СПОСОБ ВЫЧИСЛЕНИЯ ЦИФРОВЫХ ВИДЕОГОЛОГРАММ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

FIELD: physics. SUBSTANCE: data, which define an object to undergo reconstruction, are first organised in form of a certain number of virtual layers, where each layer defines sets of object data such that a set of video hologram data can be calculated from said two-dimensional sets of object data. At the first step, each two-dimensional set of object data is converted to a two-dimensional wave field distribution. That wave field distribution is calculated for the virtual window of a viewer in a reference layer at a limited distance from the video hologram layer. The calculated two-dimensional wave field distributions in the virtual window of the viewer from all two-dimensional sets of object data are then put together in order to determine the overall set of data of the window of the viewer. That overall set of data of the window of the viewer is then converted from the reference layer to a video hologram layer in order to form a set of video hologram data for a digital video hologram. EFFECT: simple process, improved method. 29 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 434 258 (13) C2 (51) МПК G03H 1/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2007127915/28, 22.12.2005 (24) Дата начала отсчета срока действия патента: 22.12.2005 (73) Патентообладатель(и): СИРИАЛ ТЕКНОЛОДЖИЗ ГМБХ (DE) R U Приоритет(ы): (30) Конвенционный приоритет: 23.12.2004 DE 102004063838.1 (72) Автор(ы): ШВЕРДТНЕР Армин (DE) (43) Дата публикации заявки: 27.01.2009 Бюл. № 3 2 4 3 4 2 5 8 (45) Опубликовано: 20.11.2011 Бюл. № 32 (56) Список документов, цитированных в отчете о поиске: US 6621605 B1, 16.09.2003. WO 2004/044659 A2, 27.05.2004. WO 03/025680 A1, 27.03.2003. RU 2130632 C1, 20.05.1999. 2 4 3 4 2 5 8 R U (86) Заявка PCT: EP 2005/013836 (22.12.2005) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 23.07.2007 (87) Публикация заявки РСТ: WO 2006/066906 (29.06.2006) ...

УСТРОЙСТВО ДЛЯ ГОЛОГРАФИЧЕСКОЙ РЕКОНСТРУКЦИИ ТРЕХМЕРНЫХ СЦЕН

FIELD: physics; image processing. SUBSTANCE: invention relates to holographic reconstruction of three-dimensional scenes. The device includes an optical focusing device which directs sufficiently coherent light from a light source to the eyes of at least one observer through a spatial optical modulator which is encoded by holographic information. The device has several illumination units for illuminating the surface of the spatial optical modulator (SOM); each unit has a focusing element (21/22/23 or 24) and a light source (LS1/LS2/LS3 or LS4), which radiates sufficiently coherent light so that each of these illumination units illuminates one separate region (R1/R2/R3 or R4) of the surface; the focusing element and the light source move such that light radiated by light sources (LS 1 -LS 4 ) converges near or on the eyes of the observer. EFFECT: possibility of encoding a large area video hologram. 19 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 383 913 (13) C2 (51) МПК G03H 1/22 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (30) Конвенционный приоритет: 06.05.2005 DE 102005022658.2 (73) Патентообладатель(и): СИРИАЛ ТЕКНОЛОДЖИЗ ГМБХ (DE) (43) Дата публикации заявки: 20.06.2009 2 3 8 3 9 1 3 (45) Опубликовано: 10.03.2010 Бюл. № 7 (56) Список документов, цитированных в отчете о поиске: WO 2004/044659 А2, 27.05.2004. WO 2004/031841 А2, 15.04.2004. GB 2350963 A, 13.12.2000. RU 2219588 C1, 20.12.2002. 2 3 8 3 9 1 3 R U (86) Заявка PCT: EP 2006/004217 (05.05.2006) C 2 C 2 (85) Дата перевода заявки PCT на национальную фазу: 06.12.2007 (87) Публикация PCT: WO 2006/119920 (16.11.2006) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, ООО "Союзпатент", пат.пов. Ю.Б.Перегудовой, рег. № 1103 (54) УСТРОЙСТВО ДЛЯ ГОЛОГРАФИЧЕСКОЙ РЕКОНСТРУКЦИИ ТРЕХМЕРНЫХ СЦЕН (57) Реферат: Изобретение относится к голографической реконструкции трехмерных сцен. Устройство включает в себя оптическое фокусирующее ...

СПОСОБ ВЫЧИСЛЕНИЯ ГОЛОГРАММЫ

FIELD: physics. SUBSTANCE: invention comprises producing wave fronts that would have been formed by actual version of object reestablished nearby eyes of spectator. Watch window define wave fronts that would have been formed by real object located at the same position as reestablished object. Then reverse conversion of said wave fronts into hologram images can be made to define how hologram image can be encoded to shape said wave fronts. Hologram image thus encoded will form, then reestablishment of 3D image that can be observed by locating eyes in watch window plane and observing reestablished image via said window. EFFECT: higher quality of reestablished scene. 22 cl, 9 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 393 518 (13) C2 (51) МПК G03H 1/22 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (30) Конвенционный приоритет: 23.12.2004 DE 102004063838.1 (73) Патентообладатель(и): СИРИАЛ ТЕКНОЛОДЖИЗ ГМБХ (DE) (43) Дата публикации заявки: 27.01.2009 2 3 9 3 5 1 8 (45) Опубликовано: 27.06.2010 Бюл. № 18 (56) Список документов, цитированных в отчете о поиске: WO 2004/044659 А2, 27.05.2004. WO 01/95016 А2, 13.12.2001. US 2004/0021917 A1, 05.02.2004. RU 2195694 C2, 27.12.2002. 2 3 9 3 5 1 8 R U (86) Заявка PCT: EP 2005/013879 (22.12.2005) C 2 C 2 (85) Дата перевода заявки PCT на национальную фазу: 23.07.2007 (87) Публикация PCT: WO 2006/066919 (29.06.2006) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, ООО "Союзпатент", пат.пов. Ю.Б.Перегудовой, рег. № 1103 (54) СПОСОБ ВЫЧИСЛЕНИЯ ГОЛОГРАММЫ (57) Реферат: Изобретение относится к измерительной технике. В изобретении предусмотрено получение волновых фронтов, которые были бы сформированы реальной версией восстанавливаемого объекта вблизи местоположения глаза наблюдателя. В окне наблюдения определяются волновые фронты, которые были бы сформированы реальным объектом, расположенным в том же положении, что и восстановленный объект. Затем можно ...

СПОСОБ И УСТРОЙСТВО ДЛЯ КОДИРОВАНИЯ И ВОССТАНОВЛЕНИЯ ВИДЕОГОЛОГРАММ, СФОРМИРОВАННЫХ КОМПЬЮТЕРОМ

Изобретение относится к голографии. Способ и устройство предназначены для восстановления голографических трехмерных объектов наблюдения с использованием пикселей с электронным управлением в голографической матрице (3), с минимальной разрешающей способностью, которые как можно лучше обеспечивают отсутствие мерцания и перекрестной помехи, в режиме реального времени и для обоих глаз одновременно, в большой зоне просмотра. В способе используются преимущества средства (2) оптического фокусирования для формирования изображения вертикально когерентного света, излучаемого линейным источником (1) света в окнах (8R, 8L) просмотра после модуляции с помощью матрицы (3) пикселя. Голографическое восстановление (11) объекта наблюдения является видимым из окон (8R, 8L) просмотра. Управляемые пиксели расположены в столбцах (15, 16) пикселей, которые кодируют отдельные голограммы одного и того же объекта для обоих глаз (R, L) наблюдателя. Средство (7) разделения изображения с разделяющими элементами открывает ...

ВИДЕОГОЛОГРАММА И УСТРОЙСТВО ДЛЯ ВОССТАНОВЛЕНИЯ ВИДЕОГОЛОГРАММ

... 1. Видеоголограмма и устройство для восстановления видеоголограмм, содержащее оптическую систему, состоящую, по меньшей мере, из одного реального или виртуального точечного и/или линейного, достаточно когерентного источника света и линзы, а также видеоголограммы из регулярно расположенных в виде матрицы или иным образом ячеек, по меньшей мере, с одним регулируемым по амплитуде и/или фазе отверстием на ячейку и плоскости рассмотрения в месте изображения источника света, отличающиеся тем, что в плоскости рассмотрения локализовано окно (5) наблюдения с определенным интервалом периодичности восстановления в виде Фурье образа видеоголограммы (3), через которое можно наблюдать трехмерную картину (6), при этом протяженность окна (5) наблюдения не превышает интервал периодичности. 2. Видеоголограмма и устройство по п.1, отличающиеся тем, что окно (5) наблюдения приблизительно ограничено глазом, межзрачковым расстоянием наблюдателя или другой подходящей областью и позиционировано. 3. Видеоголограмма ...

Security holograms

We describe methods of recording a holographic image onto holographic recording film, film bearing recorded holographic images, and apparatus for recording a holographic image onto film, in particular for security holograms. We thus describe a method of recording a holographic image onto holographic recording film (108), said holographic image comprising a 3D object (102) or a hologram of a three-dimensional (3D) object in conjunction with a multi-channel holographic image (106), the method comprising: forming a holographic recording stack by: positioning said holographic recording film (108) over a multichannel image generation device (106); positioning at least one three-dimensional (3D) object (102) under said multichannel image generation device; and providing a transparent window (106b) in said multichannel image generation device in a region above said at least one object (102); and then recording said holographic image in said holographic recording film by illuminating said stack ...

Holography 3D display

A holographic three dimensional display is provided in which no 3D cross-talk problem arises. The display comprises a display panel 10 representing a hologram image with a back light unit on the rear side of the display panel 10. First and second light path deflecting cells 30a, 30b are positioned in front of the display panel 10 for forming a first prism pattern along a first direction and which rotating by a predetermined angle from a perpendicular axes of the display 10 respectively. The cells may be formed from liquid crystal prisms.

Conjugate suppression

Head-up display

Image projection

A METHOD OF COMPUTING A HOLOGRAM

COMPUTATION TIME REDUCTION FOR THREE-DIMENSIONAL DISPLAYS

A reconfigurable, three-dimensional display (1) wherein knowledge of the viewer's (4) eyes is used to enable the effective exit pupil(s) of the display system to be optimised. The system utilises this knowledge to identify contributing regions (5) within the display (1) that contribute light to the viewer (4). Priority is given to calculating and displaying the part of the display corresponding to the contributing region (5), thereby allowing the system computation requirements to be minimised. Further computation savings are achievable by recognising that only light travelling in a limited range of angles need to be considered.

AN OPTICAL MATERIAL FOR USE IN DOCUMENTS OF VALUE

An optical material, for use in documents of value, having at least one at least dual-channel hologram for the holographic reconstruction of different images from different directions of observation. Different regions of the hologram are associated with the different channels. The regions of the hologram reconstructing the respective image under incident light have sub-regions which do not take part in the image reconstruction, to a data carrier having at least one optical material. A method for the manufacture of the optical material is also described.

ЗАЩИТНОЕ УСТРОЙСТВО

Защитное устройство, содержащее поверхностную рельефную микроструктуру, которая под действием падающего излучения воспроизводит голограмму, наблюдаемую в зоне наблюдения, причем голограмма содержит по меньшей мере первый элемент голографического изображения (50, 52) в плоскости изображения, отстоящей от поверхности микроструктуры. Устройство демонстрирует, по меньшей мере, одно дополнительное изображение (54) в плоскости, отстоящей от плоскости изображения первого голографического элемента (50, 52). Промежуток между плоскостью изображения первого голографического элемента и плоскостью дополнительного изображения таков, что при наклоне устройства первый элемент голографического изображения (50, 52) демонстрирует видимое перемещение относительно дополнительного изображения (54), причем скорость перемещения составляет по меньшей мере 6 мм на радиан наклона, в котором, будучи выражена в радианах, скорость параллактического перемещения на радиан равна промежутку между плоскостями, и произведение ...

ЗАЩИТНОЕ УСТРОЙСТВО

Защитное устройство, которое содержит поверхностную рельефную микроструктуру, которая под действием падающего излучения восстанавливает голограмму в зоне наблюдения. При этом голограмма содержит по меньшей мере первый элемент голографического изображения (50, 52) в плоскости изображения, отдаленной от поверхности микроструктуры. Устройство демонстрирует по меньшей мере одно дополнительное изображение (54) в плоскости, отдаленной от плоскости изображения первого голографического элемента (50, 52). Промежуток между плоскостью изображения первого голографического элемента и плоскостью дополнительного изображения такой, что при наклоне устройства первый элемент голографического изображения (50, 52) показывает видимое перемещение относительно дополнительного изображения (54). При этом скорость перемещения составляет как минимум на радиан наклона устройства, а произведение скорости перемещения и прилегающего угла зоны наблюдения определяет расстояние, которое составляет минимум 18 % длины видимого ...

ЗАЩИТНОЕ УСТРОЙСТВО

Защитное устройство, содержащее поверхностную рельефную микроструктуру, которая под действием падающего излучения воспроизводит голограмму, наблюдаемую в зоне наблюдения, причем голограмма содержит по меньшей мере первый элемент голографического изображения (50, 52) в плоскости изображения, отстоящей от поверхности микроструктуры. Устройство демонстрирует по меньшей мере одно дополнительное изображение (54) в плоскости, отстоящей от плоскости изображения первого голографического элемента (50, 52). Промежуток между плоскостью изображения первого голографического элемента и плоскостью дополнительного изображения таков, что при наклоне устройства первый элемент голографического изображения (50, 52) демонстрирует видимое перемещение относительно дополнительного изображения (54), причем скорость перемещения составляет по меньшей мере 6 мм на радиан наклона, в котором, будучи выражена в радианах, скорость параллактического перемещения на радиан равна промежутку между плоскостями и произведение ...

HOLOGRAPHIC VEHICLE SIGNALLING DEVICE

홀로그램 계산 방법

재구성될 물체의 실제 버전에 의해 발생되어질 개략적인 관찰자 눈 위치에서 파면을 결정함으로써 홀로그램을 계산하는 방법이 제공된다. 통상의 컴퓨터 발생된 홀로그램에서, 물체를 재구성하는 데 필요한 파면을 결정하지만, 이것은 본 발명에서 직접 행해지지 않는다. 그 대신에, 재구성된 물체의 동일 위치에 위치된 실제 물체에 의해 발생될 관찰자 창에서 파면을 결정한다. 이어서, 이들 파면을 발생하기 위해 홀로그램이 어떻게 인코딩되어야 하는지를 결정하기 위해 이들 파면을 홀로그램으로 역변환할 수 있다. 이어서, 적절히 인코딩된 홀로그램은 사람의 눈을 관찰자의 평면에 놓고 관찰자 창을 통해 봄으로써 관찰될 수 있는 3차원 장면의 재구성을 발생할 수 있다. There is provided a method of calculating a hologram by determining a wavefront at a general observer eye position to be generated by an actual version of an object to be reconstructed. In a typical computer generated hologram, the wavefront required to reconstruct the object is determined, but this is not done directly in the present invention. Instead, the wavefront is determined in the observer window to be generated by the actual object located at the same position of the reconstructed object. These wavefronts can then be inversely transformed into a hologram to determine how the hologram should be encoded to generate these wavefronts. The appropriately encoded hologram can then generate a reconstruction of a three-dimensional scene that can be observed by placing the human eye on the observer's plane and viewing through the observer window.

METHOD FOR ENCODING A COMPUTER-GENERATED HOLOGRAM

The object of the invention is to improve the quality of encoding a CGH of a three-dimensional object on a light modulator with the help of an iterative method with phase encoding and thus to improve the reconstruction quality. Based on given object data sets, a two-dimensional distribution of N complex values of a wave field in a virtual observer window (2), which is located within a transformation area (1), is calculated. Said distribution forms there a distribution of complex set-point values, which serves as a basis for comparison for an iterative calculation of the code. Following process steps are carried out: said distribution is transformed into the plane of the light modulator (5) where it is represented with the help of phase encoding, wherein k phase values represent each complex value of the transformation as initial values for iterative calculation, the iterative calculation between two planes, namely the observer plane (7) and the plane of the light modulator (5), is repeated ...

METHOD AND DEVICE FOR ENCODING AND RECONSTRUCTING COMPUTER-GENERATED VIDEO HOLOGRAMS

A method and a device for encoding and reconstructing computer-generated video holograms with the help pf a conventional LC display aims to reconstruct holographically three-dimensional scenes using electronically controllable pixel in a holographic array (3) with a minimal resolution, as free as possible from flickering and cross-talking, in real time, and for both eyes at the same time in a large viewing zone. The method takes advantage of an optically focusing means (2) in order to image vertically coherent light emitted by a line light source (1) into viewing windows (8R, 8L) after modulation by the pixel array (3). The holographic reconstruction (11) of the scene is rendered visible from viewing windows (8R, 8L) for both eyes of an observer by way of diffraction at the pixels. According to the invention, the controllable pixels are disposed in pixel columns (15, 16), which encode separate holograms of the same scene for both of the observer's eyes (R, L), where said holograms are one-dimensional ...

Kombinierte lichtmodulationsvorrichtung zur benutzernachfuhrung

Method of computing a hologram for reconstructing an object using a display device

A method of computing a hologram for reconstructing an object using a display device. The display device enables a holographic reconstruction of the object. The display device includes a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method includes the steps of: (a) computing the hologram by determining the wavefronts at an approximate observer eye position that would be generated by a real version of the object to be reconstructed; and (b) encoding the computed hologram in the hologram-bearing medium.

ホログラムを計算する方法

METHOD OF REPRODUCING IMAGES

... 1384963 Multiple image holography KONISHIROKU PHOTO INDUSTRY CO Ltd 28 April 1972 19951/72 Heading G2J Image holograms, from which three-dimensional images are to be reconstructed, are formed by (a) preparing a transparency comprising a plurality of adjacent images of a three-dimensional object in which each image represents a view of the object from a different viewpoint; (b) locating the transpiracy between a coherent light source and a lens array consisting of as many spaced lenses as there are images on the transparency whereby on illuminating the transparency through a diffusing screen each image thereon is re-imaged by a respective lens on a record medium upon which is simultaneously incident a mutually coherent reference beam thus forming on such record a composite hologram of said images. Illumination of the hologram with an incoherent reconstruction beam gives a three-dimensional image of the object. Either the reference beam used in forming the hologram or the beam employed to ...

Image projection

A diffractive structure, hologram or kinoform, 1554 arranged to spatially modulate light transformable by a viewing system into a target image is disclosed. The diffractive structure is configured to generate a plurality of discrete light patterns 1552 via distinct holographic channels. Each pattern corresponds to a different part of the target image. The shape of each discrete light pattern may substantially correspond to that of an entrance aperture of the viewing system (1505, Fig. 5), which might be an eye. The structure may spatially modulate the phase of light. A waveguide (1508, Fig. 5) may be interposed between the diffractive structure and the viewer, and can be arranged for pupil expansion. The diffractive structure and lightguide may be part of a system, which can be a holographic projector. The holographic channels may be separated (Fig. 15b) or partially separated, and may follow distinct optical paths.

DECREASE OF THE COMPUTING TIME FOR THREE-DIMENSIONAL ANNOUNCEMENTS

PROCEDURE AND DEVICE FOR THE COMPUTATION OF COMPUTER-PRODUCED VIDEO HOLOGRAMME ONES

홀로그램 계산 방법

재구성될 물체의 실제 버전에 의해 발생되어질 개략적인 관찰자 눈 위치에서 파면을 결정함으로써 홀로그램을 계산하는 방법이 제공된다. 통상의 컴퓨터 발생된 홀로그램에서, 물체를 재구성하는 데 필요한 파면을 결정하지만, 이것은 본 발명에서 직접 행해지지 않는다. 그 대신에, 재구성된 물체의 동일 위치에 위치된 실제 물체에 의해 발생될 관찰자 창에서 파면을 결정한다. 이어서, 이들 파면을 발생하기 위해 홀로그램이 어떻게 인코딩되어야 하는지를 결정하기 위해 이들 파면을 홀로그램으로 역변환할 수 있다. 이어서, 적절히 인코딩된 홀로그램은 사람의 눈을 관찰자의 평면에 놓고 관찰자 창을 통해 봄으로써 관찰될 수 있는 3차원 장면의 재구성을 발생할 수 있다. There is provided a method of calculating a hologram by determining a wavefront at a general observer eye position to be generated by an actual version of an object to be reconstructed. In a typical computer generated hologram, the wavefront required to reconstruct the object is determined, but this is not done directly in the present invention. Instead, the wavefront is determined in the observer window to be generated by the actual object located at the same position of the reconstructed object. These wavefronts can then be inversely transformed into a hologram to determine how the hologram should be encoded to generate these wavefronts. The appropriately encoded hologram can then generate a reconstruction of a three-dimensional scene that can be observed by placing the human eye on the observer's plane and viewing through the observer window.

광시야각 디스플레이들 및 사용자 인터페이스들

이미지들을 표시하며 입체 사용자 인터페이스들을 구현하기 위한 방법들 및 시스템들이 개시된다. 하나의 예시적인 실시예는, 광원, 이미지 생성 유닛-상기 이미지 생성 유닛은 상기 광원으로부터 상기 이미지 생성 유닛에 접근하는 광과의 상호작용시에 이미지를 생성함, 접안 렌즈, 및 상기 이미지로부터의 광을 상기 접안 렌즈의 표면으로 지향시키는 미러를 포함하고, 상기 표면은 평면 곡선을 회전축 주위로 적어도 180도 회전시킴으로써 형성되는 회전 입체의 형상을 갖는 시스템을 제공한다. 다른 예시적인 실시예는 공중 부양 사용자 인터페이스를 구현하기 위한 방법으로서, 제1 공중 부양 디스플레이의 표시 공간 내에 제1 이미지를 표시하는 단계, 상기 제1 공중 부양 디스플레이의 표시 공간 내에 실제 객체를 삽입하는 단계, 상기 공중 부양 디스플레이의 표시 공간 내의 실제 객체의 위치를 결정하는 단계, 상기 표시 공간 내에 상기 실제 객체를 배치하는 단계, 및 상기 위치를 상기 공중 부양 사용자 인터페이스에 입력으로서 제공하는 단계를 포함하는 방법을 제공한다. Methods and systems for displaying images and implementing stereoscopic user interfaces are disclosed. One exemplary embodiment includes a light source, an image generating unit, which generates an image upon interaction with light from the light source that approaches the image generating unit, the eyepiece, and the light from the image To a surface of the eyepiece, wherein the surface has a rotationally solid shape formed by rotating a plane curve at least 180 degrees about an axis of rotation. Another exemplary embodiment is a method for implementing a levitated user interface, comprising: displaying a first image in a display space of a first levitated display; inserting an actual object within a display space of the first levitated display; Determining a location of an actual object in the display space of the levitation display, placing the actual object in the display space, and providing the location as an input to the levitation user interface to provide.

홀로그램을 생성하기 위한 방법

... 본 발명은 2 차원 및/또는 3 차원 장면을 디스플레이하기 위한 홀로그래픽 디스플레이를 위한 공간 광 변조 장치에서 인코딩을 위한 홀로그램을 생성하기 위한 방법에 관한 것이다. 2 차원 및/또는 3 차원 장면은 오브젝트 포인트들로 분해되고, 공간 광 변조 장치에서 서브 홀로그램들로 분할되는 홀로그램으로 인코딩된다. 장면의 오브젝트 포인트들은 공간 광 변조 장치 상의 인코딩 영역에서 인코딩된다. 인코딩 영역의 크기 및/또는 형상은, 가상 가시 영역에서 보다 높은 회절 차수의 크로스토크를 감소시키는 방식으로 인코딩 영역과 관련된 서브 홀로그램의 크기 및/또는 형상과 비교하여 선택된다.

DESPECKLING A COMPUTER GENERATED HOLOGRAM

A method for despeckling the image reproduced by a Computer Generated Hologram (CGH) including reproducing a CGH, and jittering a location of an exit pupil (33,250) of an optical system through which the CGH is imaged, relative to an observer's input pupil (31,255), so as to shift at least some speckles (32,260) out of the exit pupil. A method for despeckling a Computer Generated Holographic movie including computing a first modulation for a first holographic image in a holographic movie, and computing a second modulation for a second holographic image using an initial phase distribution used for calculating the first holographic image as an initial phase distribution used for calculating the second modulation. Related apparatus and methods are also described.

Security element with diffractive structure

Ein erstes Bild, das durch eine diffraktive Struktur (13) in einer Schicht (12) einem Sicherheitselement (1,2) bereitgestellt wird, wird erst bei einem starken Verkippungswinkel der Verkippung des Sicherheitselements (1, 2) als Ganzes sichtbar, wobei der Betrachtungswinkel mehr als 50°, bevorzugt mehr als 60° und besonders bevorzugt mehr als 70° beträgt. Es kann insbesondere ein Echtfarbenbild als Bild in der Ersten Beugungsordnung verwirklicht sein. Der Effekt stellt ein effizientes Sicherheitsmerkmal dar, das wegen der dabei einzusetzenden kleinen Gitterabstände von Beugungsgittern auch nur schwer fälschbar ist.

Segmented hologram for multi-image display

A holographic display includes "segmented" images (24) configured as if positioned in separate viewing "cells" (28, 28a corresponding spatially to preselected subareas of a desired display area with invisible segmenting cell sides. Constantly viewable unsegmented holographic images recorded in the same recording medium (16') as the segmented images or on a separate recording medium can be multiplexed into the display area using a conjugate light source (50) of a different frequency or having a different polarization condition (e . g., unpolarized) from the conjugate light source (20) used to project the segmented images to be selectively displayed/blocked. ...

OPTICAL SECURITY DEVICE

СПОСОБ ВЫЧИСЛЕНИЯ ЦИФРОВЫХ ВИДЕОГОЛОГРАММ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Изобретение относится к голографии. Данные, определяющие объект, подлежащий восстановлению, вначале организуются в виде некоторого числа виртуальных слоев, при этом каждый слой определяет наборы данных объекта таким образом, что набор данных видеоголограммы может быть вычислен из этих двухмерных наборов данных объекта. На первом шаге следует преобразовать каждый двухмерный набор данных объекта в распределение двухмерного волнового поля. Это распределение волнового поля вычисляется для виртуального окна наблюдателя в опорном слое на ограниченном расстоянии от слоя видеоголограммы. Затем вычисленные распределения двухмерного волнового поля в виртуальном окне наблюдателя от всех двухмерных наборов данных объекта складываются, чтобы определить суммарный набор данных окна наблюдателя. Затем этот суммарный набор данных окна наблюдателя преобразуется из опорного слоя в слой видеоголограммы, чтобы сформировать набор данных видеоголограммы для цифровой видеоголограммы. 2 н. и 27 з.п. ф-лы, 5 ил.

VERRINGERUNG DER RECHENZEIT FÜR DREIDIMENSIONALE ANZEIGEN

Verfahren und Einrichtung zum Berechnen computer generierter Videohologramme

Ein Verfahren zum Berechnen von Computer-generierten Videohologrammen ordnet Objekte mit komplexen Amplitudenwerten einer dreidimensionalen Szene in Rasterpunkten von parallelen, virtuellen Schnittebenen zu, um zu jeder Schnittebene einen separaten Objektdatensatz mit diskreten Amplitudenwerten in Rasterpunkten zu definieren und aus den Bilddatensätzen eine holographische Kodierung für eine Lichtmodulatormatrix eines Hologrammdisplays zu berechnen. DOLLAR A Die Lösung der Aufgabe nutzt gemäß der Erfindung den Grundgedanken, computergestützt die folgenden Schritte durchzuführen: DOLLAR A È aus jedem Objektdatensatz jeder tomographischen Szeneschnittfläche wird ein Beugungsbild in From einer separaten zweidimensionalen Verteilung von Wellenfeldern für eine Referenzebene mit einem endlichen Abstand parallel zu den Schnittebenen berechnet, wobei die Wellenfelder aller Schnitte für mindestens ein gemeinsames virtuelles Fenster berechnet werden, das in der Referenzebene nahe den Augen eines Betrachters liegt und dessen Fläche gegenüber dem Videohologramm reduziert ist, DOLLAR A È die berechneten Verteilungen aller Schnittebenen werden zur Beschreibung eines gemeinsamen Wellenfeldes für das Fenster in einem Referenzdatensatz addiert und DOLLAR A È der Referenzdatensatz wird zum Erzeugen eines Hologrammdatensatzes für ein gemeinsames Computer-generiertes Hologramm der Szene in eine von der Referenzebene endlich entfernte, parallele Hologrammebene transformiert, wobei in der Hologrammebene die ... One method of computing computer-generated video holograms assigns objects having complex amplitude values of a three-dimensional scene to halftone dots of parallel, virtual cut planes to define a separate object data set with discrete amplitude values in halftone dots for each cut plane and a holographic coding for a light modulator matrix from the image data sets to calculate a hologram display. DOLLAR A The object of the invention is based on the idea of computer-aided execution ...

Optical security device

PROCEDURE AND DEVICE FOR THE CODING OF VIDEO HOLOGRAMMEN AND FOR RECONSTRUCTING A THREE-DIMENSIONAL SCENERY

MECHANISM FOR THE RECONSTRUCTION OF VIDEOHOLOGRAMMEN

DEVICE FOR THE HOLOGRAFI RECONSTRUCTION OF THREE-DIMENSIONAL SCENES

Security device

DEVICE FOR HOLOGRAPHIC RECONSTRUCTION OF THREE-DIMENSIONAL SCENES

A device for holographic reconstruction of three-dimensional scenes includes optical focusing means which directs sufficiently coherent light from light means to the eyes of at least one observer via a spatial light modulator that is encoded with holographic information. The device has a plurality of illumination units for illuminating the surface of the spatial light modulator (SLM); each unit comprises a focusing element (21/22/23 or 24), and a light means (LS1/LS2/LS3 or LS4) that emits sufficiently coherent light such that each of these illumination units illuminates one separate illuminated region (R1/R2/R3 or R4) of the surface, whereby the focusing element and the light means are arranged such that the light emitted by the light means (LS1 - LS4) coincides close to or at the observer eyes.

METHOD AND DEVICE FOR ENCODING AND RECONSTRUCTING COMPUTER-GENERATED VIDEO HOLOGRAMS

A method and a device for encoding and reconstructing computer-generated video holograms with the help pf a conventional LC display aims to reconstruct holographically three-dimensional scenes using electronically controllable pixel in a holographic array (3) with a minimal resolution, as free as possible from flickering and cross-talking, in real time, and for both eyes at the same time in a large viewing zone. The method takes advantage of an optically focusing means (2) in order to image vertically coherent light emitted by a line light source (1) into viewing windows (8R, 8L) after modulation by the pixel array (3). The holographic reconstruction (11) of the scene is rendered visible from viewing windows (8R, 8L) for both eyes of an observer by way of diffraction at the pixels. According to the invention, the controllable pixels are disposed in pixel columns (15, 16), which encode separate holograms of the same scene for both of the observer's eyes (R, L), where said holograms are one-dimensional ...

Broad viewing angle displays and user interfaces

Video hologram and a device used for reconstructing the video hologram

本发明涉及一种视频全息显示设备，其操作使得被重构的三维场景的大小是全息图承载介质的大小的函数；被重构的三维场景可以是全息图承载介质和虚拟的观察者窗口所限定的体积内的任何地方，其中被重构的三维场景必须通过虚拟的观察者窗口被观察。其与传统的全息图相比，在传统的全息图中，被重构的场景的大小被局部化到小很多的体积，并且根本不是全息图承载介质的大小的函数。

Display with observer tracking

본 발명은 정보, 바람직하게는 3차원 정보를 디스플레이하기 위한 디스플레이, 특히 오토스테레오스코픽 또는 홀로그래픽 디스플레이에 관한 것이다. 홀로그래픽적으로 인코딩된 물체의 스테레오뷰 또는 재구성은 이동 영역의 복수의 구역 내에서 미세 단계로 하나 또는 복수의 관찰자의 관련된 눈의 이동에 추적될 수 있다. 상기 구역들은 스위칭 가능한 편광 그리드의 활성화에 의해 선택된다. The present invention relates to a display, in particular an autostereoscopic or holographic display, for displaying information, preferably three-dimensional information. Stereoviews or reconstructions of holographically encoded objects can be tracked in the movement of one or more observers' related eyes in fine steps within a plurality of zones of the moving area. The zones are selected by activation of the switchable polarization grid.

A method of computing a hologram

A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.

METHOD AND DEVICE FOR COMPUTING COMPUTER-GENERATED VIDEO HOLOGRAMS

The data defining an object to be holographically reconstructed (3D-S) is first arranged into a number of virtual section layers (Lm), each layer defining a two-dimensional object data sets (OSm), such that a video hologram data set (HS) can be calculated from some or all of these two-dimensional object data sets. The first step is to transform each two-dimensional object data set to a two-dimensional wave field distribution. This wave field distribution is calculated for a virtual observer window (OW) in a reference layer (RL) at a finite distance (Dm) from the section layer (Lm). Next, the calculated two-dimensional wave field distributions for the virtual observer window, for all two-dimensional object data sets of section layers, are added to define an aggregated observer window data set. Then, the aggregated observer window data set is transformed from the reference layer (RL) to the video hologram layer (HL), to generate the video hologram data set (HS) for the computer-generated ...

METHOD FOR ENCODING A COMPUTER-GENERATED HOLOGRAM

The object of the invention is to improve the quality of encoding a CGH of a three- dimensional object on a light modulator with the help of an iterative method with phase encoding and thus to improve the reconstruction quality. Based on given object data sets, a two-dimensional distribution of N complex values of a wave field in a virtual observer window (2), which is located within a transformation area (1), is calculated. Said distribution forms there a distribution of complex set-point values, which serves as a basis for comparison for an iterative calculation of the code. Following process steps are carried out: said distribution is transformed into the plane of the light modulator (5) where it is represented with the help of phase encoding, wherein k phase values represent each complex value of the transformation as initial values for iterative calculation, the iterative calculation between two planes, namely the observer plane (7) and the plane of the light modulator (5), is repeated ...

INCREASING AN AREA FROM WHICH RECONSTRUCTION FROM A COMPUTER GENERATED HOLOGRAM MAY BE VIEWED

A method of enlarging an observation window (330) from which the reconstruction (35,305) from a Computer Generated Hologram (CGH) may be viewed, including reproducing a CGH, and shifting a location of an exit pupil or observation window (330a, 330b) of an optical system reproducing the CGH (10,15,20,25). A method of increasing a viewing angle from which the reconstruction (35,305,705) from a Computer Generated Hologram (CGH) may be seen, including producing a plurality of instances (714,715,716) of a CGH, projecting each one of the instances in a different direction so that a first exit pupil of a first instance is close to a second exit pupil of a second instance. An optical system including a plurality of exit pupils associated with a plurality of optical components, further including a light deflector for jittering a location of a first exit pupil so as to increase an overlap of the first exit pupil with a second exit pupil. Related apparatus and methods are also described.

INCREASING AN AREA FROM WHICH A COMPUTER GENERATED HOLOGRAM MAY BE VIEWED

A method of enlarging an observation window from which a Computer Generated Hologram (CGH) may be viewed, including producing a CGH, and shifting a location of an exit pupil of an optical system producing the CGH. A method of increasing a viewing angle from which a Computer Generated Hologram (CGH) may be seen, including producing a plurality of instances of a CGH, projecting each one of the instances in a different direction so that a first exit pupil of a first instance is close to a second exit pupil of a second instance. An optical system including a plurality of exit pupils associated with a plurality of optical components, further including a light deflector for jittering a location of a first exit pupil so as to increase an overlap of the first exit pupil with a second exit pupil. Related apparatus and methods are also described.

Method of making a synthetic focused image hologram

A method of making a synthetic focused image hologram consisting of: A step to diffusely illuminate plural number of component pictures having different image informations with coherent beam, a step to image by an imaging optical system the images of the plural number of component pictures having different image informations on a hologram recording medium, A step to irradiate a coherent reference beam on a hologram recording medium, and A step to have the beam from the component pictures and the reference beam interfere with each other and to record the interference fringes generated by said interference on the recording medium.

DISPLAY DEVICE, IN PARTICULAR A HEAD-MOUNTED DISPLAY, BASED ON TEMPORAL AND SPATIAL MULTIPLEXING OF HOLOGRAM TILES

The invention relates to a display device, in particular a head-mounted display or hocular, having a spatial light modulator and a controllable light-deflecting device for generating a multiple image of the spatial light modulator, which consists of segments, the multiple image being produced at least with a predefinable number of segments which determines the size of a visible area within which a 3D-scene holographically encoded in the spatial light modulator can be reconstructed for observation by an eye of an observer.

Optical feature, in particular for documents of value, and a manufacturing method for the later individualisation or data storage

The invention relates to an optical feature, in particular for documents of value, having at least one at least dual-channel hologram for the holographic reconstruction of different images from different directions of gaze, wherein different regions of the hologram are associated with the different channels and the regions of the hologram reconstructing the respective image under incident light have sub-regions which do not take part in the image reconstruction, to a data carrier having at least one optical feature of the invention and to a method for the manufacture of an optical feature, in particular for documents of value.

OPTICAL SECURITY DEVICE

HOLOGRAPHIC PROJECTION OPERATING DEVICE, HOLOGRAPHIC PROJECTION DEVICE AND HOLOGRAPHIC OPTICAL MODULE THEREOF

A holographic projection operating device, holographic projection device and holographic optical module thereof are illustrated. The holographic optical module has a first and a second prism array. The first prism array has a plurality of first prisms with first faces in contact with each other to form a first optical interface. The second prism array has a plurality of second prisms with second faces in contact with each other to form a second optical interface. Light is incident on the first optical interface at a first incident angle to undergo total internal reflection and generate a first reflected ray or at a second incident angle to undergo total internal reflection and generate a second reflected ray. The first or second reflected ray enters the second prism array and hits the second optical interface at a third incident angle to undergo total internal reflection and generate a third reflected ray.

HOLOGRAM

PURPOSE: To attract public attention by using a light transmissible film sheet having a Lippmann-Bragg reflection hologram as a light transmissible visible display. CONSTITUTION: The light transmissive film sheet containing a Lipmann-Bragg reflection hologram, having ≤5mm holography image depth at the visual angle of ≤20° in one side of selected visual line on one or another surface of image plane, is used as the light transmissible visual display. The holography image produced from a silver halide photographic material is obtained by exposing the material with laser and processing the material with a silver developer and next, with rehalogenating bleaching. As a result, the reddish golden color hologram which is particularly effective for the purpose of display is obtained. COPYRIGHT: (C)1991,JPO ...

GROSSE ZUSAMMENGESETZTE ANZEIGENHOLOGRAMME UND VERFAHREN

Holografisches Display mit verbesserter Rekonstruktionsqualität

Die Erfindung betrifft ein Display zum holographischen Rekonstruieren einer dreidimensionalen Szene erlauben. Specklemuster führen zum Verrauschen einer holographischen Rekonstruktion und verschlechtern ihre Qualität. Zur Lösung des Problems werden verschiedene Mittel vorgeschlagen, durch welche entsprechend dem Grundgedanken der Erfindung die Szene mit sich selbst inkohärent im Betrachterauge zeitlich oder räumlich überlagert wird. Durch diese Mittel werden die modulierten Wellenfronten jedes rekonstruierten Objektpunktes der Szene im Rekonstruktionsstrahlengang zu sich selbst verschoben und im Betrachterauge überlagert. Die Verschiebung kann ein- und zweidimensional erfolgen. Entsprechend der Anzahl der verschobenen Wellenfronten wird jeder Objektpunkt im Betrachterauge vervielfacht. Mit der Vervielfachung aller rekonstruierten Objektpvervielfacht, über die das Betrachterauge mittelt. In holographischen Displays werden so erfindungsgemäß Specklemuster reduziert und die Rekonstruktionsqualität ...

CHROMATICALLY CORRECTED DIRECTIONAL DIFFUSING SCREEN

A holographic diffuser provides a high degree of chromatic correction, or color balance, within a selected eyebox and the ability to generate more than one specific eyebox for multiple observer applications. The strength of these gratings can be varied to modify the diffraction efficiency for each colorso that the balance of colors can be varied within the eyebox. This balancing of colors can be used, for example, to compensate for color imbalance within the light source or image generator. Illuminating a first holographic medium produces a first real image of a diffusing screen in a define eyebox. A second hologram is recorded in the holographic medium using the real image produced by the first hologram as an object such that when the holographic medium is illuminated, it produces a second real image of a diffusing screen in the define eyebox. A third hologram is recorded in the holographic medium using the second real image as an object. The third hologram is formed by multiple exposures ...

DEVICE SIGNAL HAS IMAGE HOLOGRAPHIC FOR VEHICLE

METHOD FOR PRODUCING A HOLOGRAM TRANSFER WIDE VISUAL FIELD ON ITS ACTUAL IMAGERY ORTHOSCOPIC AND RESULTING HOLOGRAM

BROAD VIEWING ANGLE DISPLAYS AND USER INTERFACES

... 이미지들을 표시하며 입체 사용자 인터페이스들을 구현하기 위한 방법들 및 시스템들이 개시된다. 하나의 예시적인 실시예는, 광원, 이미지 생성 유닛-상기 이미지 생성 유닛은 상기 광원으로부터 상기 이미지 생성 유닛에 접근하는 광과의 상호작용시에 이미지를 생성함, 접안 렌즈, 및 상기 이미지로부터의 광을 상기 접안 렌즈의 표면으로 지향시키는 미러를 포함하고, 상기 표면은 평면 곡선을 회전축 주위로 적어도 180도 회전시킴으로써 형성되는 회전 입체의 형상을 갖는 시스템을 제공한다. 다른 예시적인 실시예는 공중 부양 사용자 인터페이스를 구현하기 위한 방법으로서, 제1 공중 부양 디스플레이의 표시 공간 내에 제1 이미지를 표시하는 단계, 상기 제1 공중 부양 디스플레이의 표시 공간 내에 실제 객체를 삽입하는 단계, 상기 공중 부양 디스플레이의 표시 공간 내의 실제 객체의 위치를 결정하는 단계, 상기 표시 공간 내에 상기 실제 객체를 배치하는 단계, 및 상기 위치를 상기 공중 부양 사용자 인터페이스에 입력으로서 제공하는 단계를 포함하는 방법을 제공한다.

Holographic display having improved reconstruction quality

The invention relates to a display for the holographic reconstruction of a three-dimensional scene using means which allow a reduction of speckle patterns. Speckle patterns result in the graining of a holographic reconstruction and worsen the quality thereof. Various means for solving the problem have been proposed, by which, in accordance with the basic idea of the invention, the 3D scene is incoherently superimposed with itself chronologically or spatially in the eye of the observer. The modulated wave fronts of each reconstructed object point of the scene are shifted relative to themselves in the reconstruction beam path and superimposed in the eye of the observer by these means. The shifting may occur one-dimensionally and two-dimensionally. Each object point is multiplied with itself in the eye of the observer in accordance with the number of the shifted wave fronts. With the multiplication of all reconstructed object points, the various speckle patterns over which the eye of the observer ...

VIDEO HOLOGRAM AND DEVICE FOR RECONSTRUCTING VIDEO HOLOGRAMS

The invention relates to video holograms and devices for reconstructing video holograms, comprising an optical system that consists of a light source (1), lens (2) and the video hologram (3) that is composed of cells arranged in a matrix or a regular pattern with at least one opening per cell, the phase or amplitude of said opening being controllable. The video holograms and devices for reconstructing the same are characterised in that holographic video representations of expanded spatial objects (6) can be achieved in a wide viewing area in real time using controllable displays, whereby the objects are either computer-generated or created by different means. The space-bandwidth product (SBP) of the hologram is thus reduced to a minimum and the periodicity interval of the Fourier spectrum is used as a viewing window (5) on the inverse transformation plane, through which the object is visible in the preceding space. The mobility of the viewer(s) is achieved by tracking the viewing window ...

HOLOGRAPHIC IMAGE GENERATED BASED ON EYE POSITION

A holographic display system includes an eye tracker configured to determine a position of a feature of an eye, a light source configured to output image light, and a digital dynamic hologram. The digital dynamic hologram is configured to receive the image light from the light source. The digital dynamic hologram is further configured to spatially modulate the image light based on a target image to form a reconstructed image in the eye. The reconstructed image includes noise that is non-uniformly distributed across the reconstructed image based on the position of the feature of the eye.

HOLOGRAM REPRODUCING AND IMAGING APPARATUS, AND HOLOGRAM REPRODUCING AND IMAGING METHOD

A hologram reproducing and imaging apparatus includes a reference light source configured to be arranged near a hologram recording material on which a hologram is recorded and has an arrangement of a plurality of light sources, a reference light source drive section configured to drive the plurality of light sources in a time-division manner, an imaging sensor configured to capture an image of a reproduction area irradiated with reference light from the reference light source and photoelectrically convert the image, and an image processing section configured to process an imaging signal from the imaging sensor. Partial captured images are obtained by enabling the imaging signal of the area irradiated when the plurality of light sources are turned on, and the partial captured images are combined to be a reproduction image by the image processing section.

Holographisches Head-up-Anzeigesystem

Die Erfindung bezieht sich auf ein Head-up-Anzeigesystem mit einer Beleuchtungseinrichtung (6, 23, 26, 27, 30, 31) und einem insbesondere wenigstens teilweise durchsichtigen Umlenkkörper (5, 5'), mittels dessen Licht zu einem Betrachtungsort gelenkt wird, wobei der Umlenkkörper (5, 5') ein Multiplexing-Hologramm oder mehrere Hologramme aufweist, durch die jeweils bei geeigneter Beleuchtung Bilder von einzelnen oder mehreren Anzeigesegmenten (9, 10, 11, 12, 13, 14, 15, 16, 32, 33) vom Betrachtungsort aus sichtbar werden. Hierdurch kann in der Anzeige für einen Betrachter durch Adressierung einzelner Hologramme durch entsprechende Auswahl der Referenzstrahlen jeweils eine bestimmte Auswahl von Segmenten als Teilhologramme angezeigt und somit ein Gesamtbild komponiert werden. The invention relates to a head-up display system having a lighting device (6, 23, 26, 27, 30, 31) and a deflecting body (5, 5 '), which is in particular at least partially transparent, by means of which light is directed to a viewing location, wherein the deflecting body (5, 5 ') has a multiplexing hologram or a plurality of holograms, through which images of individual or several display segments (9, 10, 11, 12, 13, 14, 15, 16, 32, 33 ) become visible from the viewing location. In this way, a particular selection of segments can be displayed as partial holograms in the display for a viewer by addressing individual holograms by appropriate selection of the reference beams, and thus an overall picture can be composed.

Large display composite holograms and methods

Signaling device for car in highway, has Doppler radar for determining distance between car and following car, where holographic image is generated when distance between cars is less than predetermined minimum distance

The device has a holographic signaling module intended to generate a holographic image visible by a driver of a following car (5) located to the rear of a car (4). A Doppler radar (10) determines the distance between the two cars, where the holographic image is generated when the distance between the two cars is less than a predetermined minimum distance. The holographic image is generated only when the two cars are on the same lane, where the predetermined minimum distance is calculated based on the relative speed between the cars.

METHOD AND DEVICE FOR RECONSTRUCTING A THREE-DIMENSIONAL HOLOGRAM, AND HOLOGRAM-BEARING MEDIUM

본 발명은 비디오 홀로그램과, 광학 시스템을 구비한 비디오 홀로그램 재구성 장치에 관한 것으로서, 광학 시스템은 광원(1)과, 렌즈(2)와, 매트릭스 또는 일정한 패턴으로 배열된 셀들로 구비되되 각 셀은 적어도 하나의 개구부(opening)를 가지며 상기 개구부의 위상 또는 진폭은 제어 가능한 비디오 홀로그램(3)을 구비한다. 비디오 홀로그램 및 이의 재구성 장치는, 확대된 공간 물체(6)의 홀로그래피 비디오 표현이 제어 가능한 디스플레이를 이용하여 실시간으로 넓은 관찰 영역에서 달성될 수 있으며, 그것에 의해 물체는 컴퓨터로 생성되거나 다른 수단에 의해 만들어지는 것을 특징으로 한다. 홀로그램의 공간-대역폭 곱(SBP: space-bandwidth product)은 따라서 최소값으로 감소하고 푸리에 스펙트럼의 주기성 간격은 역 변환 평면 상에서 관찰 평면(5)으로 사용되며, 그것을 통해 물체는 전술한 공간에서 눈에 보이게 된다. 관찰자(들)의 이동은 관찰 창을 추적함에 의해 달성된다. 본 발명은 다른 경제 분야 및 사회 분야에 더하여, 텔레비전, 멀티미디어, 게임 및 건설 분야에서, 군용 기술에서, 그리고 의학 기술에서 유리하게 사용될 수 있다. The present invention relates to a video hologram reconstruction apparatus having a video hologram and an optical system, the optical system comprising a light source 1, a lens 2, and cells arranged in a matrix or in a predetermined pattern, each cell having at least One opening has an opening and the phase or amplitude of the opening has a controllable video hologram 3. The video hologram and its reconstruction device can be achieved in a wide viewing area in real time using a display in which the holographic video representation of the enlarged spatial object 6 is controllable, whereby the object is computer generated or made by other means It is characterized by losing. The space-bandwidth product (SBP) of the hologram is thus reduced to a minimum and the periodicity interval of the Fourier spectrum is used as the observation plane (5) on the inverse transform plane, through which the object is visible in the aforementioned space. do. Movement of the observer (s) is accomplished by tracking the observation window. The invention can be advantageously used in the field of television, multimedia, games and construction, in military technology, and in medical technology, in addition to other economic and social fields. 홀로그램, 광원, 광학 시스템, 홀로그램 베어링 매체, 셀, 관찰 창. Hologram, light source, optical system, hologram bearing medium, cell, observation window.

관찰자 트래킹을 위한 조합된 광변조 장치

... 다양한 시야 각도에서 3D 장면을 편안하게 보기 위해 관찰자 거리가 가변적일 때 넓은 트래킹 범위를 갖는 디스플레이를 필요로 한다. 제어 가능한 광 감응 수단(500)은 관찰자 범위에서 광을 대략적(coarse) 스텝으로 편향한다. 이러한 단계 내에서 광은 다른 제어 가능한 광 감응 수단(600)에 의해 미세 등급화하여 또는 연속해서 편향된다. 광변조 장치는 홀로그래픽 또는 무안경 입체 영상 디스플레이에서 관찰자 눈(1100)을 따라 디스플레이될 이미지 정보의 가시 범위(1000)를 트래킹 하는데 적합하다.

BEAM DIVERGENCE AND VARIOUS COLLIMATORS FOR HOLOGRAPHIC OR STEREOSCOPIC DISPLAYS

INTERFEROMETRIC SPATIAL LIGHT MODULATOR FOR PRODUCTION OF DIGITAL HOLOGRAMS

Heads-up and heads-down displays employing holographic stereograms

... 055745798 Heads-up and heads-down displays employing holographic stereograms are provided. The stereograms can be oriented perpendicular to the user's line of sight (the "90 DEG case") or at angle to the line of sight (the "non-90 DEG case"). The stereograms are produced using a three-step process in which a series of two-dimensional perspective views are prepared, a H1 hologram is prepared from the two-dimensional perspective views, and a H2 hologram is prepared from the H1 hologram. For the non-90 DEG case, the two-dimensional perspective views are oriented at an angle relative to the plane of the H1 hologram during the preparation of that hologram. Similarly, during the preparation of the H2 hologram for this case, the H2 hologram is oriented at an angle relative to the H1hologram. In this way, the viewing slits generated by the holographic stereogram are located in the vicinity of the user's eyes for the non-90 DEG case as is desired. In certain embodiments, the two-dimensional perspective ...

Display with observer tracking

The invention relates to a display, in particular an autostereoscopic or holographic display, for representing preferably three-dimensional information, wherein the stereo views or the reconstructions of the holographically encoded objects can be tracked to the movements of the associated eyes of one or more observers in a finely stepped manner within a plurality of zones of the movement region. In this case, the zones are selected by the activation of switchable polarization gratings.

HOLOGRAPHIC DISPLAY

A method of displaying a Computer Generated Holographic (CGH) image by a display, including setting pixel values of a Spatial Light Modulator (SLM) included in a Head Mounted Display (HMD), producing a interference based holographic image at a first location by projecting coherent light onto the SLM, and re-imaging the holographic image from the first location to form a holographic image in front of an eye of a viewer wearing the HMD. Related apparatus and methods are also described.

Device for reconstructing video holograms

Die Erfindung betrifft Videohologramme und Einrichtungen zur Rekonstruktion von Videohologrammen mit einem optischen System, bestehend aus Lichtquelle (1), Linse (2) und dem Videohologramm (3) aus matrixförmig oder regulär angeordneten Zellen mit mindestens einer in Amplitude und/oder Phase steuerbaren Öffnung je Zelle. Die Videohologramme und Einrichtungen zur Rekonstruktion derselben zeichnen sich dadurch aus, dass holografische Videodarstellungen ausgedehnter räumlicher Objekte (6) in einem weiten Betrachterbereich mittels steuerbarer Displays in Echtzeit realisierbar sind, wobei die Objekte entweder computergeneriert oder auf andere Weise erzeugt werden. Das Space-Bandwith-Produkt (SBP) des Hologramms wird dabei auf ein Minimum reduziert, indem das Periodizitätsintervall des Fourierspektrums in der Rücktransformationsebene als Betrachterfenster (5) genutzt wird, durch welches das Objekt im davorliegenden Raum sichtbar wird. Die Beweglichkeit des/der Betrachter wird durch Nachführen ...

METHOD AND DEVICE FOR ENCODING AND RECONSTRUCTING COMPUTER-GENERATED VIDEO HOLOGRAMS

PUPIL EXPANDER

СПОСОБ И УСТРОЙСТВО ДЛЯ КОДИРОВАНИЯ И ВОССТАНОВЛЕНИЯ ВИДЕОГОЛОГРАММ, СФОРМИРОВАННЫХ КОМПЬЮТЕРОМ

... 1. Способ кодирования и восстановления видеоголограмм, в котором средство (2) оптического вертикального фокусирования формирует изображение достаточно когерентного по вертикали света, излучаемого линейным источником (1) света и модулированного пикселями с электронным управлением голографической матрицы (3), в плоскости (5) просмотра с окнами (8r, 8l) просмотра для голографического восстановления трехмерного объекта наблюдения в пределах одного порядка дифракции и для воспроизведения этого объекта наблюдения так, что он виден из окон (8r, 8l) просмотра для обоих глаз (R, L) наблюдателя, отличающийся тем, что управляемые пиксели кодируют две отдельные голограммы одного и того же объекта наблюдения в столбцах (15-16") пикселей, по одной для каждого из глаз (R, L) наблюдателя, причем указанные голограммы являются одномерными в вертикальном направлении, а пиксели расположены в отдельных группах (15-15" и 16-16") столбцов так, что эти две одномерные голограммы перемежаются в горизонтальном направлении ...

Computation time reduction for three dimensional displays

Security device

Pupil expander

Computation time reduction for three-dimensional displays

HOLOGRAPHIC IMAGE DISPLAY SYSTEM

A volumetric display system including a volumetric display for displaying a scene viewable as a three-dimensional floating-in-the-air scene in a display space, enabling a user to reach a first object into the display space, a location determination unit locating real objects in the display space, providing a location of the first object when the first object is inserted into the display space, and a computer for receiving the location of the first object, detecting when the location of the first object is at a location where an object is displayed in the three-dimensional scene, thereby determining that the first object is viewable as touching the displayed object following a detection of the first object viewable as touching the displayed object, producing a new three-dimensional scene displaying the displayed object as if manipulated by the first object. Related apparatus and methods are also described.

APPARATUS AND METHOD FOR DISPLAYING HOLOGRAM IMAGE

Provided is an apparatus and method for displaying a hologram image that may display a hologram image created by tracking a position of a pupil of a user using an acquired user image, tracking a position of a light source of a reflection hologram image that is reflected from appearance of the user, and by correcting a position of a light source of a display hologram image based on the position of the pupil of the user.

Method and system for displaying holographic images within a real object

A system for displaying a holographic image of an object behind a real object surface, including a computing unit for computing data for displaying a three-dimensional image of an object, a location measurement unit for measuring a location of a surface of a real object, a display for displaying the three dimensional image of the object, wherein the computing unit is adapted to compute data to display the three-dimensional image of the object at least partly behind the surface of the real object. Related apparatus and methods are also described.

Sicherheitsmerkmal für hohe Kippwinkel

Die Erfindung betrifft ein Sicherheitselement für Wertdokumente, wie Banknoten, Ausweiskarten oder dergleichen, mit einem ersten Sicherheitsmerkmal, das bevorzugt eine diffraktive Struktur, insbesondere eine Hologramm ist. Erfindungsgemäß ist in mindestens einem Bereich des ersten Sicherheitselementes ein zweites Sicherheitsmerkmal angeordnet, das mindestens aus einem Subwellenlängengitter, einem geblazten Gitter oder einem Sägezahngitter besteht. Das zweite Sicherheitsmerkmal besteht hierbei aus mindestens einem perspektivisch verzerrten Bild, das bei Betrachtung unter einem Betrachtungswinkel verzerrungsfrei in den korrekten Proportionen erscheint, bei dem das Subwellenlängengitter, geblazte Gitter oder Sägezahngitter optisch aktiv ist. Bei einem anderen Betrachtungswinkel tritt das zweite Sicherheitsmerkmal nicht oder gegenüber dem ersten Sicherheitsmerkmal kaum in Erscheinung.

Forgery prevention medium

A forgery prevention medium includes a volume hologram layer 2 on which an interference pattern is recorded after being exposed to an emitted laser beam; a digital watermarking information layer (22) that can be interpreted by emitting a light beam with a predetermined wavelength; and an adherend (41) that has the digital watermarking information layer and is attached to the volume hologram layer, wherein the information layer is of a different color from the volume hologram layer.

Image projector

A head-up display (HUD) system, which may be used in a vehicle, comprises a picture generating unit (Fig.4, 410), an optical system (Fig.4, 420) and an optical combiner, e.g. a windscreen (Fig.4, 430). The picture generating unit is arranged to display picture content 707 within a sub-area 605 on a screen and the optical system is arranged to relay light to the combiner which reflects the light to an eye-box to form a virtual image of the picture content. The sub-area has a shape preferably comprising at least five sides, and an optical component of the optical system is shaped to match the sub-area. A method of reducing the volume of the head-up display further includes steps to reduce the picture content to the sub-area within a quadrilateral area on the screen, and to map the sub-area, i.e. cropped picture content, onto the optical component to identify the active area of the component. The optical component is shaped to correspond with the active area. The physical size of the screen ...

Holographic image display systems

This invention relates to holographic head-up displays (HUDs), and also to three-dimensional holographic image displays, and to related methods and processor control code. A holographic head-up display (HUD) for displaying, in an eye box of said head-up display, a virtual image comprising one or more substantially two-dimensional images, the head-up display comprising: a laser light source; a spatial light modulator (SLM) to display a hologram of said one or more substantially two-dimensional images; illumination optics in an optical path between said laser light source and said SLM to illuminate said SLM; and imaging optics to image a plane of said SLM comprising said hologram into an SLM image plane in said eye box such that the lens of the eye of an observer of said head-up display performs a space-frequency transform of said hologram on said SLM to generate an image within said observer's eye corresponding to said one or more substantially two-dimensional images.

Color holographic optical element

A process for producing a color holographic optical element in a real-time interactive multi-channel auto-stereoscopic color image display system, including producing light comprising at least three different monochromatic parts of the optical spectrum from one or more lasers and illuminating a holographic plate with the light from different directions and recorded on a panchromatic light sensitive recording material coated on a suitable substrate.

WIDE FIELD OF VIEW HYBRID HOLOGRAPHIC DISPLAY

A display for displaying a wide Field of View (FoV) scene including a holographic image within the scene, including a first Spatial Light Modulator (SLM) and an optical system for producing a first holographic image at a center of a displayed scene, and a second image display for producing at least a first additional image adjacent to the first holographic image. In some embodiments an augmented reality display is used for the displaying of the first holographic image at the center of a field of view and the second image adjacent to the first holographic image. In some embodiments a virtual reality display is used for the displaying of the first holographic image near the center of a field of view and the second image adjacent to the first holographic image. Related apparatus and methods are also described. 1. A system for displaying a wide Field of View (FoV) scene including a three-dimensional image within the scene , comprising:a head mounted display (HMD) comprising:a first display for producing a first, three-dimensional (3D) portion of a scene;an optical system for imaging the first 3D image toward a center of a viewer's field-of-view (FOV);a second display for producing a different resolution second image of a second portion of the scene next to the first 3D image; andwherein the optical system is arranged to allow the viewer a real view of the real world through the optical system,thereby combining a view of the first 3D image, the second image and the real world.2. The system of claim 1 , and further comprising a viewer pupil tracking component for tracking the viewer's pupil and wherein the viewer pupil tracking component provides data for controlling the first display and the optical system for displaying the first 3D image to the center of the viewer's FOV.3. The system of claim 1 , in which the second display comprises a lower spatial resolution display than the first display.4. The system of claim 1 , in which the second display comprises a display for ...

Holographic image display system

Disclosed are methods and systems for displaying images, and for implementing volumetric user interfaces. One exemplary embodiment provides a system comprising: a light source; an image producing unit, which produces an image upon interaction with light approaching the image producing unit from the light source; an eyepiece; and a mirror, directing light from the image to a surface of the eyepiece, wherein the surface has a shape of a solid of revolution formed by revolving a planar curve at least 180° around an axis of revolution.

PROJECTION DEVICE AND METHOD FOR THE HOLOGRAPHIC RECONSTRUCTION OF SCENES

A holographic reconstruction of scenes includes a light modulator, an imaging system with at least two imaging means and an illumination device with sufficient coherent light for illumination of hologram coded in the light modulator. The at least two imaging means are arranged such that a first imaging means is provided for the magnified imaging of the light modulator on a second imaging means. The second imaging means is provided for imaging of a plane of a spatial frequency spectrum of the light modulator in a viewing plane at least one viewing window. The viewing window corresponds to a diffraction order of the spatial frequency spectrum. 1. A holographic device for the holographic reconstruction of scenes comprising:At least one light modulator,an illumination device comprising at least one light source with coherent light for illuminating a hologram which is encoded on the light modulator,an imaging system comprising at least two imaging means, the at least two imaging means are arranged in relation to each other such that one of the at least two imaging means images a plane of a spatial frequency spectrum of the light modulator into an observer plane,at least one aperture arranged in the plane of the spatial frequency spectrum of the light modulator.2. Holographic device according to claim 1 , wherein the aperture is designed as a static aperture or as a movable aperture.3. Holographic device according to claim 1 , wherein the aperture is designed as a spatial frequency filter claim 1 , the spatial frequency filter is a complex-valued modulation element modifying amplitude and/or phase of the incident light.4. Holographic device according to claim 1 , wherein the aperture is created by a controllable modulating element claim 1 , said aperture is formed by an area on the controllable modulating element that is switched to transmit the light whereas the surrounding area is switched to block the light.5. Holographic device according to claim 2 , wherein the ...

METHOD OF COMPUTING A HOLOGRAM

A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window. 1. A method of generating a holographic reconstruction of an object using a display device and a computer , the display device including a light source , an optical system and a spatial light modulator , the optical system illuminates the spatial light modulator , the optical system images the light source into an observer plane , and the holographic reconstruction of the object being visible by the observer if the observer's eyes are placed at the observer plane; the method comprising the step of:simultaneously computing hologram data for both eyes of the observer; andusing the computer to encode a hologram on the spatial light modulator.2. The method of wherein the wavefronts are reconstructed by the hologram or wherein the wavefronts are calculated for one or more observers windows.3. The method of wherein the hologram is computed by determining the wavefronts at the observer eye position that would be generated by the object to be reconstructed or wherein the hologram data is computed by a multi-channel processor.4. The method of wherein the determined wavefronts at the observer eye position are back-transformed to the spatial ...

Method and apparatus for generating computer-generated hologram

Provided is a method of generating a computer-generated hologram (CGH), the method including obtaining complex data including amplitude data of object data and phase data of the object data corresponding to a spatial light modulator (SLM) plane by propagating the object data from an image plane to the SLM plane, encoding the complex data into encoded amplitude data, and generating a CGH based on the object data including the encoded amplitude data.

METHOD AND HOLOGRAPHIC APPARATUS FOR THE THREE-DIMENSIONAL REPRESENTATION OF SCENES

An apparatus and method for the three-dimensional representation of scenes comprising an illumination device and a spatial light modulation device for modulating incident light. A hologram is encoded into the spatial light modulation device and the hologram is composed of individual sub-holograms, in which an object point of an object of the scene to be reconstructed by the hologram is encoded in each case. The spatial light modulation device is illuminated with substantially coherent light by the illumination device in at least one illumination section. An amplitude distribution and a phase distribution for representing the scene and amplitude values and phase values derived therefrom are determined for encoding the spatial light modulation device. The amplitude of the light incident on the spatial light modulation device in the respective illumination section is set based on at least one parameter at least determined from the amplitude values in this illumination section. 1. A method for the three-dimensional representation of scenes comprising an illumination device and at least one spatial light modulation device for modulating incident light , where a hologram is encoded into the at least one spatial light modulation device and the hologram is composed of individual sub-holograms , in which an object point of an object of a scene to be reconstructed by the hologram is encoded in each case , where the at least one spatial light modulation device is illuminated with substantially coherent light by the illumination device in at least one illumination section , where an amplitude distribution and a phase distribution for representing the scene and amplitude values and phase values derived therefrom are determined for encoding the at least one spatial light modulation device , and where the amplitude of the light incident on the at least one spatial light modulation device in the respective illumination section is set on the basis of at least one parameter at least ...

Head mounted display with lightguide and holographic element

A head mounted display (HMD) system employs a holographic element in the optical path of the HMD to direct light to a user's eye. The HMD includes a micro-display, a lightguide, and a holographic element coupled to the lightguide. The holographic element is coupled to a polarization film, and together the element and film reflect and transmit light of different polarities in a specified pattern to assist the lightguide in directing light to the user's eye. For example, the hologram and polarization film can be configured to pass R-polarized light and reflect L-polarized light, thereby directing light from the waveguide along a specified path.

METHOD OF COMPUTING A HOLOGRAM FOR RECONSTRUCTING AN OBJECT USING A DISPLAY DEVICE

A method of computing a hologram for reconstructing an object using a display device. The display device enables a holographic reconstruction of the object. The display device includes a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method includes the steps of: (a) computing the hologram by determining the wavefronts at an approximate observer eye position that would be generated by a real version of the object to be reconstructed; and (b) encoding the computed hologram in the hologram-bearing medium. 1. A display device for reconstructing a three dimensional scene , the display device comprising:an optical system;at least one light source; anda hologram-bearing medium;the at least one light source and the optical system are adapted to illuminate the hologram-bearing medium being encodable with a hologram, (a) encoded with information for that single point in the reconstructed three dimensional scene;', '(b) the only region in the hologram encoded with information for that single point; and', '(c) restricted in size to form a portion of the entire hologram, the size being such that multiple reconstructions of that point caused by higher diffraction orders are not visible at the defined viewing position., 'the hologram comprises a region with information needed to reconstruct a single point of the three dimensional scene, the single point being visible from a defined viewing position, the region being2. A method for reconstructing a three dimensional scene using a display device , the display device comprising:an optical system;at least one light source; anda hologram-bearing medium;the at least one light source and the optical system are adapted to illuminate the hologram-bearing medium being encodable with a hologram, (a) encoded with information for that single point in the reconstructed three dimensional scene;', '(b) the only region in the hologram encoded with information for that single point ...

A system and method for displaying and capturing holographic true 3d images

The present invention relates to a system and method for displaying and capturing holographic true 3D images. The system comprises elements which may form both a wide viewing angle holographic true 3D display and a holographic true 3D video camera. The system mainly comprises a light source, a spatial light modulator or an electro-optical capturing device in different embodiments of the invention, a curved mirror, a computer and a beam splitter and opaque mask in some embodiments of the invention.

Conjugate Suppression

A holographic projector and method of holographic projection is disclosed. A first array of light-modulating pixels displays a first hologram and a second array of light-modulating pixels displays second hologram. A first light source illuminates the first array of pixels such that a first holographic reconstruction, comprising a first zero-order replay field, is formed on a replay plane and a second light source illuminates the second array of pixels such that a second holographic reconstruction, comprising a second zero-order replay field, is formed on the replay plane. Real image content of the first holographic reconstruction is restricted to a first sub-area of the first zero-order replay field and real image content of the second holographic reconstruction is restricted to a first sub-area of the second zero-order replay field. The holographic projector is arranged such that the first zero-order replay field and the second zero-order replay field are no more than partially overlapping. The first sub-area of the first zero-order replay field and the first sub-area of the second zero-order replay field form a continuous display area of the holographic projector.

Accessory for reflecting an image from a display screen of a portable electronic device

The invention generally relates to accessories for portable electronic devices that offer a screen for displaying the contents of a display of an electronic device. The invention provides, for an electronic device, an accessory that includes a reflective screen including a material such as a beam splitter to re-display the device display. In certain aspects, the invention provides a reflective screen for use with a computing device that has a reflective material and a mechanism to hold the screen above a horizontal surface at an angle.

Method and apparatus for generating hologram with wide viewing angle

A method and apparatus for generating a hologram with a wide viewing angle is disclosed. The method includes generating a elemental complex hologram by applying oblique projection to three-dimensional (3D) information of an object based on a viewing direction, and generating a final hologram by superposing a plurality of elemental complex holograms generated based on different viewing directions.

Method of computing a hologram for reconstructing an object using a display device

A method of computing a hologram for reconstructing an object using a display device. The display device enables a holographic reconstruction of the object. The display device includes a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method includes the steps of: (a) computing the hologram by determining the wavefronts at an approximate observer eye position that would be generated by a real version of the object to be reconstructed; and (b) encoding the computed hologram in the hologram-bearing medium.

Holographic display device

The invention relates to a holographic display device for representing a two-dimensional and/or three-dimensional scene. The holographic display device comprises at least one spatial light modulator device and an optical component. The at least one spatial light modulator device is provided in order to reconstruct the scene and in order to generate at least one virtual visibility region in an observer plane. The optical component is configured with at least two regions that have a different transparency to one another, the value of the transparency respectively lying between 0 and 1. Furthermore, the optical component is arranged in the display device in such a way that it provides filtering, to be carried out at least partially, of a diffraction order spot in at least one diffraction order inside the virtual visibility region.

Dynamic hologram parameter control

Systems, methods, and computer-readable media are disclosed for controlling parameters of a holographic image. A gaze direction of a user is detected and user interaction data indicative of the gaze direction of the user is generated. A determination is then made using the user interaction data that the gaze direction of the user at least partially coincides with an object of interest. A further determination is made that the object of interest is at least partially obscured by the holographic image. One or more of the parameters of the holographic image are then adjusted to enhance visibility of the object of interest to the user.

Despeckling a computer generated hologram

A method for despeckling a Computer Generated Hologram (CGH) including producing a CGH, and jittering a location of an exit pupil of an optical system through which the CGH is imaged, relative to an observer's input pupil, so as to shift at least some speckles out of the exit pupil. A method for despeckling a Computer Generated Holographic movie including computing a first modulation of a first holographic image in a holographic movie, and computing a second modulation of a second holographic image using an initial phase distribution used for calculating the first holographic image as an initial phase distribution used for calculating the second modulation. Related apparatus and methods are also described.

INFORMATION PROCESSING APPARATUS AND NON-TRANSITORY COMPUTER READABLE MEDIUM

An information processing apparatus includes a controller that changes an outer edge of an image formed in air over time. 1. An information processing apparatus comprising:a controller that changes an outer edge of an image formed in air over time.2. The information processing apparatus according to claim 1 , wherein the outer edge becomes larger or smaller over time.3. The information processing apparatus according to claim 1 , wherein a form of a target reproduced by the image changes over time.4. The information processing apparatus according to claim 3 , wherein the form of the target grows over time.5. The information processing apparatus according to claim 3 , wherein the form of the target regresses over time.6. The information processing apparatus according to claim 1 , wherein a target reproduced by the image is switched.7. The information processing apparatus according to claim 1 , wherein a posture of a target reproduced by the image is switched.8. The information processing apparatus according to claim 1 , wherein the image changes according to a predetermined story.9. The information processing apparatus according to claim 1 , wherein a position of the outer edge moves in space while a size of the image remains unchanged.10. The information processing apparatus according to claim 1 , wherein an orientation of the outer edge changes while a size of the image remains unchanged.11. The information processing apparatus according to claim 1 , wherein details of sound or a volume of sound changes.12. A non-transitory computer readable medium storing a program causing a computer to execute a process claim 1 , the process comprising changing an outer edge of an image formed in air over time.13. An information processing apparatus comprising:control means for changing an outer edge of an image formed in air over time. This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2018-028975 filed Feb. 21, 2018.The present ...

Holographic display device and operating method thereof

Holographic display device and operation method thereof are provided. A holographic display device includes a light source device including a plurality of, light sources; and an imager including a plurality of imaging regions each corresponding to one light source. The imager includes at least one spatial light modulator configured to receive light from the plurality of light sources to form a plurality of holographic images.

COMBINED LIGHT MODULATION DEVICE FOR TRACKING USERS

For comfortable viewing of a 3-D scene at various viewing angles, a display having a large tracking range for a variable viewer distance is required. A controllable light-influencing element deflects light in coarse steps in a viewer range. Within said steps, the light is deflected by a further controllable light-influencing element continuously or with fine gradation. The light modulation device is suitable in holographic or autostereoscopic displays for guiding the visibility ranges of the image information to be displayed so as to follow the eyes of the viewers. 1. A light modulator device for a holographic or an autostereoscopic display for the representation of three-dimensional image information , the light modulator device comprising:at least one real or virtual light source;a first and a second light-affecting means;an eye position detection system; anda system controller;wherein encoded image information of an image to be represented to at least one observer eye of at least one observer is written to at least one light modulator;wherein the first and the second light-affecting means is adapted to change the optical path of the light which is emitted by the light source;wherein the eye position detection system is adapted to find and to follow at least one eye position of the at least one observer of the image information and the system controller is adapted to track at least one visibility region of the image information based on eye position information provided by the eye position detection system using the first and second light-affecting means;wherein the first light-affecting means tracks the visibility region to the eyes of the observer only in large steps within an observer range and the second light-affecting means tracks the visibility region to the eyes of the observer finely graduated or continuously at least within one such large step of the first light-affecting means; andwherein a size of the visibility region in the observer plane can be ...

METHOD OF COMPUTING A HOLOGRAM

A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window. 1. A display device for generating a holographic reconstruction of an object on the principle of a Fourier hologram , the display device including a light source , an optical system and a spatial light modulator , the optical system illuminates the spatial light modulator , the optical system images the light source into an observer plane , and the holographic reconstruction of the object being visible by the observer if the observer's eyes are placed at the observer plane;the display device is adapted to encode a hologram on the spatial light modulator, a computer calculating the hologramsuch that the holographic reconstruction of the object is visible by the observer behind the spatial light modulator when observed by the observer at the observer plane; orsuch that the holographic reconstruction of the object is visible by the observer on a side of the spatial light modulator opposite to the observer plane.2. The display device of wherein the computer calculates the hologram such that the holographic reconstruction of the object is visible by the observer in front of the spatial light modulator.3. The display device of being ...

A method of computing a hologram

A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.

Device for reconstructing video holograms

The device has an optical system with a light source(s) and lens. The video hologram has cells, e.g. in a matrix, with an opening(s) per cell of controlled amplitude/phase and an observation plane. An observation window in the observation plane at a periodicity interval of the reconstruction as a Fourier transform of the video hologram enables viewing of a three-dimensional scene. The window size is not greater than the periodicity interval. The device has an optical system consisting of at least one real or virtual point- and/or line-shaped, adequately coherent light source (1) and a lens (2) and the video hologram (3) consists of cells in a matrix or other regular arrangement with at least one opening per cell of controlled amplitude and/or phase and an observation plane at the location of the light source image. An observation window (5) is located in the observation plane at a periodicity interval of the reconstruction as a Fourier transform of the video hologram for observation of a three-dimensional scene (6). The size of the window is not greater than the periodicity interval.

Increasing an area from which reconstruction from a computer generated hologram may be viewed

Beam divergence and various collimators for holographic or stereoscopic displays

본 발명은 조명 장치, 확대 유닛(VE) 및 광 변조기(SLM)를 구비한 홀로그래픽 디스플레이에 관한 것이다. 조명 장치는 적어도 하나의 광원과 광 시준장치(LCU)를 포함하고, 광 시준장치(LCU)는 적어도 하나의 광원의 광을 시준하고 평면파의 구별가능한 각 스펙트럼을 가진 광원에 의해 방사된 광의 광 파동장을 발생하도록 설계되며, 확대 유닛(VE)은 광 전파 방향에서 볼 때 광 시준장치(LCU)의 하류에 배치되고, 확대 유닛(VE)은 광 파동장의 왜상 확장이 광 파동장과 부피 홀로그램(VH)의 투과형 상호작용에 기인하여 실현되도록 설계 및 배치되는 투과형 부피 홀로그램(VH)을 포함하고, 광 변조기(SLM)는 광 전파 방향에서 볼 때 왜상 확대 유닛(VE)의 상류 또는 하류에 배치된다. The invention relates to a holographic display comprising a lighting device, a magnifying unit (VE) and an optical modulator (SLM). The illumination device includes at least one light source and a light collimator (LCU), wherein the light collimator (LCU) collimates the light of the at least one light source and generates an optical pulse of light radiated by a light source having a distinct spectrum of plane waves (VE) is arranged downstream of the light collimator (LCU) when viewed in the light propagation direction, and the enlargement unit (VE) is designed so that the aberration expansion of the optical wave field is controlled by the optical wave field and the volume hologram VH), and the optical modulator SLM is disposed upstream or downstream of the diverging unit VE as viewed in the direction of the light propagation direction .

Method and system for displaying holographic images within a real object

A system for displaying a holographic image of an object behind a real object surface, including a computing unit for computing data for displaying a three-dimensional image of an object, a location measurement unit for measuring a location of a surface of a real object, a display for displaying the three dimensional image of the object, wherein the computing unit is adapted to compute data to display the three-dimensional image of the object at least partly behind the surface of the real object. Related apparatus and methods are also described.

Wide field of view hybrid holographic display

A display for displaying a wide Field of View (FoV) scene including a holographic image within the scene, including a first Spatial Light Modulator (SLM) and an optical system for producing a first holographic image at a center of a displayed scene, and a second image display for producing at least a first additional image adjacent to the first holographic image. In some embodiments an augmented reality display is used for the displaying of the first holographic image at the center of a field of view and the second image adjacent to the first holographic image. In some embodiments a virtual reality display is used for the displaying of the first holographic image near the center of a field of view and the second image adjacent to the first holographic image. Related apparatus and methods are also described.

Holographic wide field of view display

A head-mounted display device comprises a rendering engine configured to generate a hologram representative of a three-dimensional object. The hologram includes depth information that causes the three-dimensional object to be rendered with a focus that is determined by the depth information. The device also includes a spatial light modulator that modulates light from a light source as indicated by the hologram. A switchable hologram comprises multiple stacked switchable gratings. Each of the stacked switchable gratings is associated with one or more resulting exit pupil locations on a viewing surface. The system also comprises an eye tracker configured to map a viewing direction of a user's eye to a viewing location on the viewing surface. A processor is configured to activate a particular switchable grating within the switchable transmission hologram that is associated with an exit pupil location that aligns with the viewing location.

Light field display system based amusement park attraction

A light filed (LF) display system for displaying holographic content to viewers in an amusement park (e.g., as part of an amusement park ride). The LF display system in an amusement park includes LF display modules tiled together to form an array of LF modules. In some embodiments, the LF display system includes a tracking system and/or a viewer profiling module. The tracking system and viewer profiling module can monitor and store characteristics of viewers on the amusement park ride, a viewer profile describing a viewer, and/or responses of viewers to the holographic content during the amusement park ride. The holographic content created for display on an amusement park ride can be based on any of the monitored or stored information.

Light field display system based amusement park attraction

A light filed (LF) display system for displaying holographic content to viewers in an amusement park (e.g., as part of an amusement park ride). The LF display system in an amusement park includes LF display modules tiled together to form an array of LF modules. In some embodiments, the LF display system includes a tracking system and/or a viewer profiling module. The tracking system and viewer profiling module can monitor and store characteristics of viewers on the amusement park ride, a viewer profile describing a viewer, and/or responses of viewers to the holographic content during the amusement park ride. The holographic content created for display on an amusement park ride can be based on any of the monitored or stored information.

Holographic image generated based on eye position

A holographic display system includes an eye tracker configured to determine a position of a feature of an eye, a light source configured to output image light, and a digital dynamic hologram. The digital dynamic hologram is configured to receive the image light from the light source. The digital dynamic hologram is further configured to spatially modulate the image light based on a target image to form a reconstructed image in the eye. The reconstructed image includes noise that is non-uniformly distributed across the reconstructed image based on the position of the feature of the eye.

METHOD OF COMPUTING A HOLOGRAM

A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window. 1. A method for computing a computer-generated video hologram , where object data defining objects in a three dimensional scene is arranged into a number of virtual section layers , each layer defining a two-dimensional object data set , such that a video hologram data set can be calculated from some or all of these two-dimensional object data sets; comprising the following steps:(a) in a first transformation, each two-dimensional object data set of the virtual section layers is transformed to a two-dimensional wave field distribution,(b) the calculated two-dimensional wave field distributions, for all two-dimensional object data sets of section layers, are added to define an aggregated data set(c) wherein the first transformation comprises one of (a) applying a Fourier transformation and a first phase factor describing a spherical wave, and (b) applying a Fresnel transformation, and(d) wherein the object data sets may exhibit an appropriate phase distribution or a pseudo-random phase distribution, in order to reduce speckle noise or to enhance at least one of: brightness efficiency, diffraction efficiency and brightness definition ...

홀로그래픽 또는 입체 디스플레이를 위한 빔 확장 및 각종 콜리메이터

본 발명은 조명 장치, 확대 유닛(VE) 및 광 변조기(SLM)를 구비한 홀로그래픽 디스플레이에 관한 것이다. 조명 장치는 적어도 하나의 광원과 광 시준장치(LCU)를 포함하고, 광 시준장치(LCU)는 적어도 하나의 광원의 광을 시준하고 평면파의 구별가능한 각 스펙트럼을 가진 광원에 의해 방사된 광의 광 파동장을 발생하도록 설계되며, 확대 유닛(VE)은 광 전파 방향에서 볼 때 광 시준장치(LCU)의 하류에 배치되고, 확대 유닛(VE)은 광 파동장의 왜상 확장이 광 파동장과 부피 홀로그램(VH)의 투과형 상호작용에 기인하여 실현되도록 설계 및 배치되는 투과형 부피 홀로그램(VH)을 포함하고, 광 변조기(SLM)는 광 전파 방향에서 볼 때 왜상 확대 유닛(VE)의 상류 또는 하류에 배치된다.

Holographic display apparatus capable of steering view window

본 발명은 홀로그래픽 디스플레이 장치에 관한 것으로, 가간섭성 광을 발생시키는 광원 모듈과, 상기 광원 모듈로부터 발생된 상기 광을 적어도 두 개의 수렴점들로 상기 광을 수렴시키는 인-풋 광학계와, 상기 적어도 두 개의 인-풋 광학계에서 발생된 광을 조합하여 상기 홀로그램 영상을 제공하는 아웃-풋 광학계와, 상기 광을 변조시키는 공간 광변조 모듈을 포함할 수 있다. The present invention relates to a holographic display device, comprising: a light source module for generating incoherent light; an in-foot optical system for converging the light generated from the light source module to at least two converging points; An out-foot optical system for combining the light generated by at least two in-foot optical systems to provide the hologram image, and a spatial light modulation module for modulating the light.

Video hologram and device for restoration of video holograms

FIELD: physics. ^ SUBSTANCE: invention is related to holography. Device comprises optical system comprising at least one real or virtual point and/or linear quite coherent light source and lens, and also video hologram from cells regularly installed in the form of matrix or in any other manner. In observation plane that corresponds to plane of direct or reverse Fourier transform of video hologram, observation window is localised (5), which occupies a certain interval of restoration periodicity in the form of Fourier image of video hologram (3), through which it is possible to observe restored three-dimensional scene (6), at that length of observation window (5) does not exceed interval of periodicity in the plane of reverse Fourier image, and three-dimensional scene appears in the form of Fresnel image of video hologram. ^ EFFECT: possibility to receive topographical video images of long spatial objects of broad observation area. ^ 20 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 363 025 (13) C2 (51) МПК G03H 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007105102/28, 09.02.2007 (24) Дата начала отсчета срока действия патента: 11.11.2003 (73) Патентообладатель(и): СИРИАЛ ТЕКНОЛОДЖИЗ ГМБХ (DE) R U (30) Конвенционный приоритет: 13.11.2002 DE 10253292.3 (72) Автор(ы): ШВЕРДТНЕР Армин (DE) (43) Дата публикации заявки: 20.08.2008 2 3 6 3 0 2 5 (45) Опубликовано: 27.07.2009 Бюл. № 21 (56) Список документов, цитированных в отчете о поиске: WO 01/95016 A1, 13.12.2001. JP 2000250387 A, 14.09.2000. JP 2002218509 A, 02.08.2002. SU 930212 A, 23.05.1982. 2 3 6 3 0 2 5 R U (86) Заявка PCT: DE 03/003791 (11.11.2003) C 2 C 2 (62) Номер и дата подачи первоначальной заявки, из которой данная заявка выделена: 2005118086 11.11.2003 (87) Публикация PCT: WO 2004/044659 (27.05.2004) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, ООО "Союзпатент", пат.пов. Ю.Б.Перегудовой, рег. ...

Method and device for computing computer-generated video holograms

홀로그래픽적으로 재구성되는(3D-S) 오브젝트를 정의하는 데이터가 먼저 다수의 가상 구획층(Lm)에서 배열되고, 각각의 층은 2차원 오브젝트 데이터 집합(OSm)을 정의하며, 이로써 비디오 홀로그램 데이터 집합(HS)이 상기 2차원 오브젝트 데이터 집합의 일부 또는 전부로부터 계산될 수 있다. 제1 단계는 각각의 2차원 오브젝트 데이터 집합을 2차원 파동장 분포로 변환하는 것이다. 이 파동장 분포는 구획층(Lm)으로부터의 유한 거리(Dm)에서 기준층(RL) 내 가상 관측자 창(OW)에 대하여 계산된다. 다음에, 가상 관측자 창에 대한 계산된 2차원 파동장 분포는, 구획층의 모든 2차원 오브젝트 데이터 집합에 대해서, 집성된 관측자 창 데이터 집합을 정의하도록 부가된다. 그 다음에, 집성된 관측자 창 데이터 집합은 기준층(RL)으로부터 비디오 홀로그램층(HL)으로 변환되어 컴퓨터 생성형 비디오 홀로그램에 대한 비디오 홀로그램 데이터 집합(HS)을 생성한다. Data defining an object that is holographically reconstructed (3D-S) is first arranged in a plurality of virtual partition layers (Lm), each layer defining a two-dimensional object data set (OSm), whereby video hologram data The set HS may be calculated from some or all of the two-dimensional object data set. The first step is to transform each two-dimensional object data set into a two-dimensional wave field distribution. This wave field distribution is calculated for the virtual observer window OW in the reference layer RL at a finite distance Dm from the partition layer Lm. The calculated two-dimensional wave field distribution for the virtual observer window is then added to define the aggregated observer window data set for all two-dimensional object data sets of the partition layer. The aggregated observer window data set is then converted from the reference layer RL to the video hologram layer HL to generate a video hologram data set HS for the computer generated video hologram.

一种应用显示装置生成物体的全息再现的方法

一种应用显示装置生成物体的全息再现的方法，所述装置包括光源、光学系统和空间光调制器，光学系统用光源照明空间光调制器，其中全息图由计算机通过在近似观察者眼睛位置确定波阵面生成，该波阵面由将要再现的物体的真实形式生成，其中在空间光调制器上编码全息图。

安全装置

一种安全装置，包括响应入射辐射重放在视区可见的全息图的表面凹凸的微结构，该全息图在与微结构表面隔开的图像面中至少包括第一全息图像元素(50，52)。该装置在与第一全息元素(50，52)的所述图像面隔开的面中表现出至少一个另外的图像(54)。第一全息元素图像面与另外的图像面之间的间隔使得在倾斜装置时，第一全息图像元素(50，52)相对于另外的图像(54)表现出明显的移动，移动速率为倾斜每弧度至少6毫米，其中当以弧度表达时，每弧度的所述视差移动速率等于所述平面之间的间隔，并且移动速率和视区包括的角度的乘积定义了沿第一全息图像元素移动方向该装置尺寸的至少20％的距离。

光瞳扩展器

一种显示装置，包括图片生成单元、波导光瞳扩展器和观看者跟踪系统。图片生成单元包括第一和第二显示通道、控制器。第一和第二显示通道分别布置成输出第一和第二颜色的第一和第二空间调制光。第一和第二空间调制光分别对应于第一和第二图片。波导光瞳扩展器包括一对平行反射表面。波导光瞳扩展器限定输入端口和观看窗口。输入端口布置为接收第一和第二空间调制光。第一反射表面的反射率由渐变涂层提供。渐变涂层部分地透射第一和第二颜色的光。渐变涂层的透射率是非消色差的。观看者跟踪系统布置为确定观看窗口内的观看位置。控制器布置为基于由观看者跟踪系统确定的观看位置来将从观看位置看到的第一和第二图片的色彩平衡保持为基本恒定。

全息显示系统和全息显示方法

本发明实施例提供了一种全息显示系统和全息显示方法，利用光源模块和空间光调制器之至少一者的移动，能够在较大范围内向多个静止或移动的观察者提供全息图像。所述全息显示系统包括：光源模块，用于产生相干光束；空间光调制器，利用所述相干光束产生全息图像；位置检测装置，用于检测至少一个观察者的眼睛位置；以及致动装置，所述致动装置能够根据所述至少一个观察者的眼睛位置移动所述光源模块和空间光调制器之至少一者，从而将所述全息图像投射至所述至少一个观察者的眼睛位置。

Holograms

There is described an article which comprises on its outside a light-transparent visual display feature through which a graphic design or a solid object can be seen, the light-transparent visual display feature comprising a light-transparent film sheet which contains a Lippman-Bragg reflection hologram which has a viewing angle of not more than 20° either side of a selected viewing axis or axes and a depth of holographic image which is not more than 5mm on one side or the other of the image plane. When the article of the present invention is a package, the restricted view is advantageously prepared to be around a vertical axis relative to the observer so that as an observer passes the illuminated package laterally with the hologram on the vertical face, the hologram will suddenly come into view and just as suddenly slip from view as viewing angle is passed. When the article of the present invention is an ID card, the transparent film material bearing the hologram is laminated on to the top surface of the card which bears a graphic design relevant to the holder of the card.

Forgery-preventive hologram and forged hologram detecting method

(57)【要約】 【課題】 偽造物であることが検出可能な偽造防止ホロ グラムとそのようなホログラムの偽造検出法。 【解決手段】 平面あるいは立体の物体像が記録されて なる体積型ホログラム６であり、像Ｏ”再生面から離間 した位置であってホログラム面から離間した実空間中に 再生される視認できない微細な繰り返しパターン状の瞳 １０の像が記録されてなり、ホログラム６の観察側に離 間して視認できない微細な繰り返しパターンを有する微 細パターン板１２を配置して、モアレ縞が再生像Ｏ”に 重畳して光量ムラが生じる場合、及び、微細パターン板 １２をその面に沿って微小量移動させたときに光量変化 が起きない場合に、ホログラム６が偽造されたものであ ると判定する。

Device for restoration of holograms

Изобретение относится к голографической технике. Устройство содержит оптическую систему, состоящую из источника света, линзы и видеоголограммы из регулярно расположенных в виде матрицы или иным образом ячеек, по меньшей мере, с одним регулируемым по амплитуде и/или фазе отверстием на ячейку. В плоскости рассмотрения, соответствующей плоскости прямого или обратного преобразования Фурье видеоголограммы, локализовано окно наблюдения, обеспечивающее определенный интервал периодичности восстановления в виде образа Фурье видеоголограммы, через которое можно наблюдать восстановленную трехмерную картину, при этом протяженность окна наблюдения не превышает интервал периодичности в плоскости обратного образа Фурье и трехмерная картина возникает в виде образа Френеля видеоголограммы. Технический результат - голографические видеоизображения протяженных пространственных объектов могут быть реализованы в широком диапазоне рассмотрения в реальном времени посредством управляемых дисплеев. 9 з.п. ф-лы, 5 ил. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2 293 365 (13) C2 (51) ÌÏÊ G03H 1/00 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2005118086/28, 11.11.2003 (72) Àâòîð(û): ØÂÅÐÄÒÍÅÐ Àðìèí (DE) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 11.11.2003 (73) Ïàòåíòîîáëàäàòåëü(è): ÑÈÐÈÀË ÒÅÊÍÎËÎÄÆÈÇ ÃÌÁÕ (DE) R U (30) Êîíâåíöèîííûé ïðèîðèòåò: 13.11.2002 DE 10253292.3 (43) Äàòà ïóáëèêàöèè çà âêè: 20.01.2006 (45) Îïóáëèêîâàíî: 10.02.2007 Áþë. ¹ 4 2 2 9 3 3 6 5 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: TOMOYUKI MISHINA et al. Viewing - zone enlargement method for sampled hologram that uses high-order diffraction. Applied Optics. V.41, ¹8, ð.1489-1499. JP 2000250387 À, 14.09.2000. JP 2002218509 À, 02.08.2002. RU 2062501 C1, 20.06.1996. (86) Çà âêà PCT: DE 03/03791 (11.11.2003) C 2 C 2 (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 14.06.2005 R U 2 2 9 3 3 6 5 (87) Ïóáëèêàöè PCT: WO ...

Display device

显示装置。图像的亮度不均和颜色不均较少。本发明的显示装置具有：图像光生成装置；光学系统，从图像光生成装置射出的图像光入射至该光学系统。光学系统具有沿着图像光的光路依次配置的第1光学部、第2光学部、第3光学部以及第4光学部，第1光学部具有正屈光力，第2光学部包含具有正屈光力的第1衍射元件，第3光学部具有正屈光力，第4光学部包含具有正屈光力并形成出射光瞳的第2衍射元件。第2衍射元件由体积全息元件构成，在体积全息元件的剖视图中，干涉条纹的间距和斜率从第2衍射元件的一端朝向另一端连续地发生变化。

Thin Film Light Unit

본 발명은 초박막 라이트 유닛에 관한 것이다. 본 발명에 의한 초박막 라이트 유닛은, 고 굴절 필름, 제1 부재, 제2 부재, 제3 부재 및 광원을 포함한다. 고 굴절 필름은 일측에 구비된 경사부와, 경사부로부터 타측으로 연장되고 일정 두께를 갖는 평판부가 구비된다. 제2 부재는 경사부의 상부에서 일측에 제1 폭을 갖는다. 제1 부재는 평판부의 상부에서 타측의 중앙부에 제2 부재와 일정 거리 이격된다. 제3 부재는 평판부의 상부에서 제1 폭을 갖는다. 광원은 평판부의 측면에서 제1 부재와 인접하여 배치된다. The present invention relates to an ultra-thin light unit. An ultra-thin light unit according to the present invention includes a high refractive film, a first member, a second member, a third member, and a light source. The high refractive film is provided with an inclined portion provided on one side, and a flat portion extending from the inclined portion to the other side and having a predetermined thickness. The second member has a first width on one side of the upper portion of the inclined portion. The first member is spaced apart from the second member by a predetermined distance from the upper portion of the flat plate portion to the central portion of the other side. The third member has a first width at the top of the flat plate portion. The light source is disposed adjacent to the first member at a side surface of the flat plate portion.

VIDEO HOLOGRAM AND DEVICE FOR RESTORING VIDEO HOLOGRAMS

ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2007 105 102 (13) A (51) ÌÏÊ G03H 1/00 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÇÀßÂÊÀ ÍÀ ÈÇÎÁÐÅÒÅÍÈÅ (21), (22) Çà âêà: 2007105102/28, 09.02.2007 (71) Çà âèòåëü(è): ÑÈÐÈÀË ÒÅÊÍÎËÎÄÆÈÇ ÃÌÁÕ (DE) (30) Êîíâåíöèîííûé ïðèîðèòåò: 13.11.2002 DE 10253292 (72) Àâòîð(û): ØÂÅÐÄÒÍÅÐ Àðìèí (DE) (43) Äàòà ïóáëèêàöèè çà âêè: 20.08.2008 Áþë. ¹ 23 R U (57) Ôîðìóëà èçîáðåòåíè 1. Âèäåîãîëîãðàììà è óñòðîéñòâî äë âîññòàíîâëåíè âèäåîãîëîãðàìì, ñîäåðæàùåå îïòè÷åñêóþ ñèñòåìó, ñîñòî ùóþ, ïî ìåíüøåé ìåðå, èç îäíãî ðåàëüíîãî èëè âèðòóàëüíîãî òî÷å÷íîãî è/èëè ëèíåéíîãî, äîñòàòî÷íî êîãåðåíòíîãî èñòî÷íèêà ñâåòà è ëèíçû, à òàêæå âèäåîãîëîãðàììû èç ðàñïîëîæåííûõ â âèäå ìàòðèöû èëè èíûì ðåãóë ðíûì îáðàçîì ÷ååê, ïî ìåíüøåé ìåðå, ñ îäíèì óïðàâë åìûì ïî àìïëèòóäå è/èëè ôàçå îòâåðñòèåì íà ÷åéêó è ïëîñêîñòè íàáëþäåíè â ìåñòå èçîáðàæåíè èñòî÷íèêà ñâåòà, îòëè÷àþùèåñ òåì, ÷òî â ïëîñêîñòè íàáëþäåíè ëîêàëèçîâàíî îêíî íàáëþäåíè (5) â îäíîì èíòåðâàëå ïåðèîäè÷íîñòè âîññòàíîâëåíè â âèäå Ôóðüå îáðàçà âèäåîãîëîãðàììû (3), ÷åðåç êîòîðîå ìîæíî íàáëþäàòü òðåõìåðíóþ ñöåíó (6), è ÷òî ïðîò æåííîñòü îêíà íàáëþäåíè (5) íå ïðåâûøàåò èíòåðâàë ïåðèîäè÷íîñòè. 2. Âèäåîãîëîãðàììà è óñòðîéñòâî ïî ï.1, îòëè÷àþùèåñ òåì, ÷òî îêíî íàáëþäåíè (5) ïðèáëèçèòåëüíî îãðàíè÷åíî ãëàçîì, ìåæçðà÷êîâûì ðàññòî íèåì íàáëþäàòåë èëè äðóãîé ïîäõîä ùåé îáëàñòüþ è ïîçèöèîíèðîâàíî íà íèõ. 3. Âèäåîãîëîãðàììà è óñòðîéñòâî ïî ï.1, îòëè÷àþùèåñ òåì, ÷òî äðóãîìó ãëàçó íàáëþäàòåë ñîîòâåòñòâóåò âòîðîå îêíî íàáëþäåíè (5') çà ñ÷åò ïîäêëþ÷åíè âòîðîãî ðåàëüíîãî èëè âèðòóàëüíîãî, äîñòàòî÷íî êîãåðåíòíîãî èñòî÷íèêà ñâåòà (1') â äðóãîì ìåñòå îïòè÷åñêîé ñèñòåìû â ïàðó èñòî÷íèêîâ ñâåòà. 4. Âèäåîãîëîãðàììà è óñòðîéñòâî ïî ï.3, îòëè÷àþùèåñ òåì, ÷òî îïòè÷åñêà ñèñòåìà è âèäåîãîëîãðàììà (3) ðàñïîëîæåíû òàê, ÷òî áîëåå âûñîêèå ïîð äêè äèôðàêöèè âèäåîãîëîãðàììû (3) äë ïåðâîãî îêíà íàáëþäåíè (5) èìåþò íóëåâîå çíà÷åíèå èëè ìèíèìóì èíòåíñèâíîñòè â ìåñòå âòîðîãî îêíà íàáëþäåíè (5'). 5. ...

For tracking the combined optical modulation device of user

为了以各种视角舒适地观看三维场景，需要具有用于可变的观察者距离的较大的跟踪范围的显示器。可控的光影响元件（500）以较粗略的步幅在观察者范围中偏转光。在所述步幅内，光被进一步的可控的光影响元件（600）连续或逐步地偏转。光调制装置适于在全息或自动立体的显示中用于引导将要显示的图像信息的可见范围（1000），以便跟随观察者的眼睛（1100）。

Digital holographic table-top display apparatus and method thereof

디지털 홀로그래픽 테이블탑형 디스플레이 장치 및 그 방법이 개시된다. 본 발명의 일 실시 예에 따른 디지털 홀로그래픽 테이블탑형 디스플레이 장치는 다수의 카메라를 이용하여 테이블을 기준으로 전 방향에서 다수의 채널 영상을 획득하는 카메라 어레이와, 획득된 다수의 채널 영상에서 관찰자를 검출하고 관찰자가 검출된 적어도 하나의 채널 영상에서 관찰자의 동공 위치를 추적하는 제어부와, 추적된 동공 위치에 맞추어 3차원 공간에 디지털 홀로그래픽 영상을 재생하는 디스플레이부를 포함한다.

Holographic Optical Element, Method For Manufacturing Thereof And Apparatus For Manufacturing Thereof

본 발명은 홀로그래픽 광학소자, 그의 제조 방법 및 그의 제조 장치에 관한 것으로서, 보다 상세하게는 증강 이미지의 휘도를 향상시킬 수 있는 홀로그래픽 광학소자, 그의 제조 방법 및 그의 제조 장치에 관한 것이다.

Method for encoding a computer-generated hologram

본 발명의 목적은 위상 부호화를 이용하는 반복 방법의 도움으로 광 변조기 상에서 3차원 물체의 CGH 부호화의 품질을 개선하여, 재구성 품질을 높이는 것이다. 제공된 물체 데이터 세트에 기초하여, 변환 영역(1) 내에 위치하는 가상 관찰자 윈도우(2)에서 파동장의 N개의 복소값의 2차원 분포가 계산된다. 상기 분포는, 코드의 반복 계산에 대해 비교를 위한 기초로서의 역할을 하는 복소 설정점값의 분포를 형성한다. 이하의 프로세스 단계들이 수행된다: 상기 분포는 위상 부호화의 도움으로 표현되는 광 변조기(5)의 플레인으로 변환되고, 여기서 k개의 위상값은 반복 계산에 대한 초기값으로서 변환의 각각의 복소값을 나타내며, 두 플레인들(즉, 관찰자 플레인(7)과 광 변조기의 플레인(5)) 사이의 반복 계산은, 정의된 중단 기준에 도달할 때까지 반복 단계에서 계속된다. 상기 방법은 홀로그래픽 디스플레이 장치에 적용할 수 있다. It is an object of the present invention to improve the quality of the CGH encoding of a three-dimensional object on an optical modulator with the aid of an iterative method using phase encoding to improve the quality of reconstruction. Based on the provided object data set, the two-dimensional distribution of the N complex values of the wave field in the virtual observer window 2 located in the conversion area 1 is calculated. The distribution forms a distribution of complex set point values that serve as a basis for comparison for repeated calculations of the code. The following process steps are carried out: The distribution is transformed into a plane of the optical modulator 5 which is represented with the aid of phase encoding, where k phase values represent the respective complex values of the transform as initial values for the iterative calculation , The iterative calculation between the two planes (i.e., the observer plane 7 and the plane 5 of the optical modulator) continues at the iteration step until the defined stopping criterion is reached. The above method can be applied to a holographic display device.

Composite hologram

(57)【要約】 【課題】 体積位相型ホロクラムの再生角度外でも光回 折による像再生を可能にして再生像の見える範囲を広げ てホログラムの意匠性を向上させる。 【解決手段】 体積位相型ホログラム２が記録されてい るホログラム記録層１の少なくとも一方の表面に凹凸干 渉縞模様３で表現されるレリーフ型ホログラムが記録さ れており、凹凸干渉縞模様３の表面に反射性薄膜層４を 有する。体積位相型ホログラムの再生角度α内では体積 位相型ホログラムの再生像を見ることができ、その再生 角度外βではレリーフ型ホログラムの再生像が見えるの で、全体として見た場合のホログラムの意匠性が向上す る。

Interferometric Spatial Light Modulator For Production Of Digital Holograms

本发明公开一种数字全息设备、系统与方法。该设备包括包含基于干涉空间光调制器的显示引擎的电子显示装置以及耦合到该电子显示装置的处理器。该处理器被操作以将数字内容上传到该电子显示装置。该数字内容被显示在电子显示装置上，并且当该全息介质与电子显示装置藉由激光器产生光束而被整片曝光时，该数字内容被记录于全息图介质内。该系统附加地包括至少一个激光器，其被光学耦合到电子显示装置并且被通信地耦合到处理器。本发明同样公开一种使用数字全息系统来将数字全息记录于全息介质中的方法。

Beam divergence and various collimators for holographic or stereoscopic displays

본 발명은 조명 장치, 확대 유닛(VE) 및 광 변조기(SLM)를 구비한 홀로그래픽 디스플레이에 관한 것이다. 조명 장치는 적어도 하나의 광원과 광 시준장치(LCU)를 포함하고, 광 시준장치(LCU)는 적어도 하나의 광원의 광을 시준하고 평면파의 구별가능한 각 스펙트럼을 가진 광원에 의해 방사된 광의 광 파동장을 발생하도록 설계되며, 확대 유닛(VE)은 광 전파 방향에서 볼 때 광 시준장치(LCU)의 하류에 배치되고, 확대 유닛(VE)은 광 파동장의 왜상 확장이 광 파동장과 부피 홀로그램(VH)의 투과형 상호작용에 기인하여 실현되도록 설계 및 배치되는 투과형 부피 홀로그램(VH)을 포함하고, 광 변조기(SLM)는 광 전파 방향에서 볼 때 왜상 확대 유닛(VE)의 상류 또는 하류에 배치된다. The present invention relates to a holographic display having a lighting device, an enlargement unit (VE) and a light modulator (SLM). The illumination device comprises at least one light source and a light collimator (LCU), the light collimator (LCU) collimating the light of at least one light source and a light wave of light emitted by a light source having a distinguishable angular spectrum of a plane wave Designed to generate a field, the enlargement unit (VE) is disposed downstream of the light collimator (LCU) when viewed in the direction of light propagation, and the enlargement unit (VE) has an optical wave field and a volume hologram ( And a transmissive volume hologram (VH) designed and arranged to be realized due to the transmissive interaction of VH), wherein the light modulator (SLM) is disposed upstream or downstream of the distortion expansion unit (VE) when viewed in the direction of light propagation. .

Beam divergence and various collimators for holographic or stereoscopic displays

本发明涉及一种具有照明装置、放大单元（VE）和光调制器（SLM）的全息显示器，其中，照明装置包括至少一个光源和光准直单元（LCU），光准直单元（LCU）设计成使其准直至少一个光源的光，并产生由光源发射的具有平面波可指定角度谱的光的光波场，从光的传播方向看去，放大单元（VE）设置在光准直单元（LCU）的下游，其中，放大单元（VE）包括透射体积全息图（VH），设计并设置该透射放大体积全息图，使得由于光波场与体积全息图（VH）的透射相互作用，实现光波场的失真扩展，从光传播方向上看，光调制器（SLM）设置在失真放大单元（VE）的上游或下游。

Combined light modulation device for tracking users

다양한 시야 각도에서 3D 장면을 편안하게 보기 위해 관찰자 거리가 가변적일 때 넓은 트래킹 범위를 갖는 디스플레이를 필요로 한다. 제어 가능한 광 감응 수단(500)은 관찰자 범위에서 광을 대략적(coarse) 스텝으로 편향한다. 이러한 단계 내에서 광은 다른 제어 가능한 광 감응 수단(600)에 의해 미세 등급화하여 또는 연속해서 편향된다. 광변조 장치는 홀로그래픽 또는 무안경 입체 영상 디스플레이에서 관찰자 눈(1100)을 따라 디스플레이될 이미지 정보의 가시 범위(1000)를 트래킹 하는데 적합하다. It requires a display with a wide tracking range when the observer distance is variable to comfortably view the 3D scene at various viewing angles. The controllable optical responsive means (500) deflects the light in a coarse step in the observer range. Within this step the light is either fine graded by another controllable light sensitive means 600 or continuously deflected. The light modulation device is suitable for tracking the visible range 1000 of image information to be displayed along the observer's eye 1100 in a holographic or no-spectacle stereoscopic display.

A method of computing a hologram

재구성될 물체의 실제 버전에 의해 발생되어질 개략적인 관찰자 눈 위치에서 파면을 결정함으로써 홀로그램을 계산하는 방법이 제공된다. 통상의 컴퓨터 발생된 홀로그램에서, 물체를 재구성하는 데 필요한 파면을 결정하지만, 이것은 본 발명에서 직접 행해지지 않는다. 그 대신에, 재구성된 물체의 동일 위치에 위치된 실제 물체에 의해 발생될 관찰자 창에서 파면을 결정한다. 이어서, 이들 파면을 발생하기 위해 홀로그램이 어떻게 인코딩되어야 하는지를 결정하기 위해 이들 파면을 홀로그램으로 역변환할 수 있다. 이어서, 적절히 인코딩된 홀로그램은 사람의 눈을 관찰자의 평면에 놓고 관찰자 창을 통해 봄으로써 관찰될 수 있는 3차원 장면의 재구성을 발생할 수 있다. There is provided a method of calculating a hologram by determining a wavefront at a general observer eye position to be generated by an actual version of an object to be reconstructed. In a typical computer generated hologram, the wavefront required to reconstruct the object is determined, but this is not done directly in the present invention. Instead, the wavefront is determined in the observer window to be generated by the actual object located at the same position of the reconstructed object. These wavefronts can then be inversely transformed into a hologram to determine how the hologram should be encoded to generate these wavefronts. The appropriately encoded hologram can then generate a reconstruction of a three-dimensional scene that can be observed by placing the human eye on the observer's plane and viewing through the observer window.

Pulpil expander

본 명세서에서 화상 생성 유닛, 도파관 동공 확장기 및 관찰자 추적 시스템을 포함하는 디스플레이 장치가 개시된다. 화상 생성 유닛은 제1 디스플레이 채널, 제2 디스플레이 채널 및 컨트롤러를 포함한다. 제1 디스플레이 채널은 제1 색상인 제1 공간 변조된 광을 출력하도록 배열된다. 제1 공간 변조된 광은 제1 화상에 대응한다. 제2 디스플레이 채널은 제2 색상인 제2 공간 변조된 광을 출력하도록 배열된다. 제2 공간 변조된 광은 제2 화상에 대응한다. 제어기는 제1 디스플레이 채널 및 제2 디스플레이 채널을 구동하도록 배열된다. 도파관 동공 확장기는 한 쌍의 평행 반사 표면을 포함한다. 도파관 동공 확장기는 입력 포트와 관찰 윈도우를 형성한다. 입력 포트는 제1 공간 변조 광 및 제2 공간 변조 광을 수신하도록 배열된다. 관찰 윈도우는 관찰자가 제1 화상과 제2 화상을 관찰 할 수 있는 영역 또는 용적부이다. 한 쌍의 평행한 반사 표면은 일련의 내부 반사에 의해 입력 포트로부터 관찰 윈도우로 제1 공간 변조 광 및 제2 공간 변조 광을 안내하도록 배열된다. 한 쌍의 평행 반사 표면 중 제1 반사 표면의 반사율은 단계적 코팅에 의해 제공된다. 단계적 코팅은 제1 색상의 광과 제2 색상의 광에 대해 부분적으로 투과성이다. 단계적 코팅의 투과율은 비무채색이다. 관찰자 추적 시스템은 관찰 윈도우 내에서 관찰 위치를 결정하도록 배열된다. 제어기는 관찰자-추적 시스템에 의해 결정된 관찰 위치에 기초하여 관찰 위치로부터 관찰되는 바와 같이 제1 및 제2 화상의 색상 균형을 실질적으로 일정하게 유지하도록 배열된다. Disclosed herein is a display device including an image generating unit, a waveguide pupil dilator and an observer tracking system. The image generating unit includes a first display channel, a second display channel and a controller. The first display channel is arranged to output a first spatially modulated light of a first color. The first spatially modulated light corresponds to the first image. The second display channel is arranged to output a second spatially modulated light of a second color. The second spatially modulated light corresponds to the second image. A controller is arranged to drive the first display channel and the second display channel. A waveguide pupil dilator includes a pair of parallel reflective surfaces. A waveguide pupil dilator forms an input port and an observation window. The input port is arranged to receive the first spatially modulated light and the second spatially modulated light. The observation window is an area or volume through which an observer can observe the first image and the second image. A pair of parallel reflective surfaces are arranged to guide the first spatially modulated light and the second spatially modulated light from the input ...

Holographic display having improved reconstruction quality

본 발명은 스펙클 무늬의 감소를 가능케 하는, 3차원 장면의 홀로그래피 재구성을 위한 디스플레이에 관한 것이다. 스펙클 무늬는 홀로그래피 재구성물의 그래뉼레이션을 유발하여 그 품질을 악화시킨다. 본 문제점을 해결하기 위해, 본 발명의 기본 사상에 따라 3차원 장면을 시간 및 공간상으로 보는 사람 눈에 중첩하는 여러 수단들이 마련된다. 그러한 수단들에 의해, 장면의 재구성된 각각의 물점의 변조 파면들이 재구성 빔 경로에서 서로 시프트되어 중첩된다. 그러한 시프트는 1차원적으로 및 2차원적으로 이뤄질 수 있다. 각각의 물점은 시프트된 파면들의 수에 상응하게 보는 사람 눈에서 배가된다. 재구성된 모든 물점들의 배가에 의해, 여러 스펙클 무늬들도 배가되고, 그 배가된 스펙클 무늬에 걸쳐 보는 사람 눈을 에버리징한다. 본 발명에 따라 그와 같이 하여, 홀로그래피 디스플레이에서 스펙클 무늬가 감소하고, 재구성 품질이 향상된다.

A method of computing a hologram

재구성될 물체의 실제 버전에 의해 발생되어질 개략적인 관찰자 눈 위치에서 파면을 결정함으로써 홀로그램을 계산하는 방법이 제공된다. 통상의 컴퓨터 발생된 홀로그램에서, 물체를 재구성하는 데 필요한 파면을 결정하지만, 이것은 본 발명에서 직접 행해지지 않는다. 그 대신에, 재구성된 물체의 동일 위치에 위치된 실제 물체에 의해 발생될 관찰자 창에서 파면을 결정한다. 이어서, 이들 파면을 발생하기 위해 홀로그램이 어떻게 인코딩되어야 하는지를 결정하기 위해 이들 파면을 홀로그램으로 역변환할 수 있다. 이어서, 적절히 인코딩된 홀로그램은 사람의 눈을 관찰자의 평면에 놓고 관찰자 창을 통해 봄으로써 관찰될 수 있는 3차원 장면의 재구성을 발생할 수 있다.

Head-up display

提供了一种具有眼盒的平视显示器，该眼盒包括驾驶员监视系统、图片生成单元和光学系统。驾驶员监视系统布置成照射并监视驾驶员。驾驶员监视系统包括第一显示通道。图片生成单元布置为在回放平面上显示图片。图片生成单元包括第二显示通道。每个显示通道包括光源、空间光调制器和控制器。每个光源布置成发射光。每个空间光调制器布置成接收来自相应光源的光并根据在空间光调制器上显示的计算机生成的全息图输出空间调制光，以在回放平面上形成相应的光图案。每个控制器布置为将计算机生成的全息图输出到空间光调制器。光学系统布置成中继来自回放平面的每个光图案。光学系统包括输入、输出和至少一个镜子。输入布置成接收每个光图案的光。输出布置为输出每个光图案的光。至少一个镜子布置成沿光路将来自输入的光引导至输出。第一显示通道形成的光图案为红外光图案。每个光图案都是全息重建。

For beam divergence and the multiple collimating apparatus of holographic or three-dimensional display

本发明涉及一种具有照明装置、放大单元（VE）和光调制器（SLM）的全息显示器，其中，照明装置包括至少一个光源和光准直单元（LCU），光准直单元（LCU）设计成使其准直至少一个光源的光，并产生由光源发射的具有平面波可指定角度谱的光的光波场，从光的传播方向看去，放大单元（VE）设置在光准直单元（LCU）的下游，其中，放大单元（VE）包括透射体积全息图（VH），设计并设置该透射放大体积全息图，使得由于光波场与体积全息图（VH）的透射相互作用，实现光波场的失真扩展，从光传播方向上看，光调制器（SLM）设置在失真放大单元（VE）的上游或下游。

Projection device and method for the holographic reconstruction of scenes

A holographic reconstruction of scenes includes a light modulator, an imaging system with at least two imaging means and an illumination device with sufficient coherent light for illumination of hologram coded in the light modulator. The at least two imaging means are arranged such that a first imaging means is provided for the magnified imaging of the light modulator on a second imaging means. The second imaging means is provided for imaging of a plane of a spatial frequency spectrum of the light modulator in a viewing plane at least one viewing window. The viewing window corresponds to a diffraction order of the spatial frequency spectrum.

Viewer tracking in a projection system

A method for displaying a hologram to a variable direction including using circuitry to determine a direction from a holographic projector to a viewer for projecting a hologram to a viewer, and projecting a hologram in the determined direction, in which the projecting the hologram includes reflecting from a same mirror as the determining the direction of the viewer, and the circuitry controls the projecting the hologram to a direction corrected for a difference in direction between a projecting unit and a tracking unit relative to the mirror. Related apparatus and methods are also described.

Large display composite holograms and methods

A composite hologram comprises a plurality of hologram tiles (48, 50) arranged for display, each of said hologram tiles formed by exposing each of a plurality of different unexposed photographic plates simultaneously to light scattered by an intermediate hologram (H1) using a conjugate complex (R*1) of a first reference wave from a coherent light source and to a second reference wave (R2) from said coherent light source.

Procedure and device for projecting and observing differentiated or stereoscopic images, drawings, photographs, cinematographic films or videos

The invention relates to a procedure and a device where luminous figures are projected by a conventional projector 7 onto a specially designed and constructed holographic screen or, by a more direct procedure, with figures or photographs close to or in contact with this holographic screen. The device 3 makes it possible to orient the observation position 8 for each individual figure according to its given colour, allowing at the same time the projection of different scenes for various points of view. The procedure and the device according to the invention are particularly intended for the demonstration of visual effects.

Apparatus for generating hologram and method for generating hologram

홀로그램 생성 방법이 개시된다. 일 실시 예에 의한 홀로그램 생성 방법은, 3차원 공간 데이터 정보를 입력 받는 단계, 상기 3차원 공간 데이터 정보의 제 1 SLM(spatial light modulator) 및 제 2 SLM 각각에 대응하는 홀로그램 평면상에 투영되는 제 1 투영 위치 및 제 2 투영 위치를 결정하는 단계, 상기 제 1 투영 위치에 대응하는 제 1 FZP(Fresnel Zone Plate) 패턴을 생성하는 단계 및 상기 제 1 FZP 패턴을, 상기 제 2 투영 위치에 대응하는 FZP 패턴으로서 결정하는 단계를 포함한다. A method of generating a hologram is disclosed. The hologram generation method according to an embodiment includes the steps of receiving 3D spatial data information, a first spatial light modulator (SLM) of the 3D spatial data information, and a second SLM projected on a hologram plane corresponding to each of the second SLM. Determining a 1 projection position and a second projection position, generating a first FZP (Fresnel Zone Plate) pattern corresponding to the first projection position, and the first FZP pattern corresponding to the second projection position Determining as the FZP pattern.

Video hologram and device for reconstructing video holograms

본 발명은 비디오 홀로그램과, 광학 시스템을 구비한 비디오 홀로그램 재구성 장치에 관한 것으로서, 광학 시스템은 광원(1)과, 렌즈(2)와, 매트릭스 또는 일정한 패턴으로 배열된 셀들로 구비되되 각 셀은 적어도 하나의 개구부(opening)를 가지며 상기 개구부의 위상 또는 진폭은 제어 가능한 비디오 홀로그램(3)을 구비한다. 비디오 홀로그램 및 이의 재구성 장치는, 확대된 공간 물체(6)의 홀로그래피 비디오 표현이 제어 가능한 디스플레이를 이용하여 실시간으로 넓은 관찰 영역에서 달성될 수 있으며, 그것에 의해 물체는 컴퓨터로 생성되거나 다른 수단에 의해 만들어지는 것을 특징으로 한다. 홀로그램의 공간-대역폭 곱(SBP: space-bandwidth product)은 따라서 최소값으로 감소하고 푸리에 스펙트럼의 주기성 간격은 역 변환 평면 상에서 관찰 평면(5)으로 사용되며, 그것을 통해 물체는 전술한 공간에서 눈에 보이게 된다. 관찰자의 이동은 관찰 창을 추적함에 의해 달성된다. 본 발명은 다른 경제 분야 및 사회 분야에 더하여, 텔레비전, 멀티미디어, 게임 및 건설 분야에서, 군용 기술에서, 그리고 의학 기술에서 유리하게 사용될 수 있다.

Method and device for encoding and reconstructing computer-generated video holograms

A method and a device for encoding and reconstructing computer-generated video holograms using a conventional LC display: it provides holographic reconstruction of three-dimensional scenes using electronically controllable pixel in a holographic array ( 3 ) with a conventional resolution, and is reasonably free from flickering and cross-talk. Reconstruction is in real time, and for both eyes at the same time, over a large viewing zone. The method takes advantage of an optical focusing means ( 2 ) in order to image vertically coherent light emitted by a line light source ( 1 ) into viewing windows ( 8 R, 8 L) after modulation by the pixel array ( 3 ). The holographic reconstruction ( 11 ) of the scene is rendered visible from viewing windows ( 8 R, 8 L) for both eyes of an observer by way of diffraction at the pixels. According to the invention, the controllable pixels are disposed in vertical pixel columns ( 15, 16 ), which encode separate holograms of the same scene for each of the viewer's eyes (R, L), where said holograms are one-dimensional in the vertical direction and horizontally interleaved. An image separation means ( 7 ) with separating elements arranged parallel to the pixel columns reveals the respective pixel columns ( 15, 15′ or 16, 16′ ) for one eye and covers them for the other eye.

Combined light modulation device for tracking users

다양한 시야 각도에서 3D 장면을 편안하게 보기 위해 관찰자 거리가 가변적일 때 넓은 트래킹 범위를 갖는 디스플레이를 필요로 한다. 제어 가능한 광 감응 수단(500)은 관찰자 범위에서 광을 대략적(coarse) 스텝으로 편향한다. 이러한 단계 내에서 광은 다른 제어 가능한 광 감응 수단(600)에 의해 미세 등급화하여 또는 연속해서 편향된다. 광변조 장치는 홀로그래픽 또는 무안경 입체 영상 디스플레이에서 관찰자 눈(1100)을 따라 디스플레이될 이미지 정보의 가시 범위(1000)를 트래킹 하는데 적합하다. It requires a display with a wide tracking range when the observer distance is variable to comfortably view the 3D scene at various viewing angles. The controllable optical responsive means (500) deflects the light in a coarse step in the observer range. Within this step the light is either fine graded by another controllable light sensitive means 600 or continuously deflected. The light modulation device is suitable for tracking the visible range 1000 of image information to be displayed along the observer's eye 1100 in a holographic or no-spectacle stereoscopic display.

Optical security device

Head-up display system including hologram copier

本发明涉及包括全息图复制器的平视显示器系统。具体公开了一种平视显示器（HUD）系统，其包括：一个或多个光源和一个或多个相位调制器，其被构造成生成并输出全息图；以及复制器，其被构造成接收全息图、从全息图生成全息图的N个复制品、以及输出全息图的N个复制品，其中N是大于或等于2的整数。

Method and device for computing computer-generated video holograms

A method of computing a hologram by determining the wavefronts at the approximate observer eye (OE) position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window (OW) that would be generated by a real object located at the same position of the reconstructed object (3D-S). One can then back-transform these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram (HA) can then generate a reconstruction of the three-dimensional scene (3D-S) that can be observed by placing one's eyes at the plane (OP) of the observer window (OW) and looking through the observer window (OW).

Video hologram and device for reconstructing video holograms

The invention relates to video holograms and devices for reconstructing video holograms, comprising an optical system that consists of a light source, lens and the video hologram that is composed of cells arranged in a matrix or a regular pattern with at least one opening per cell, the phase or amplitude of said opening being controllable. The video holograms and devices for reconstructing the same are characterised in that holographic video representations of expanded spatial objects can be achieved in a wide viewing area in real time using controllable displays, whereby the objects are either computer-generated or created by different means. The space-bandwidth product (SBP) of the hologram is thus reduced to a minimum and the periodicity interval of the Fourier spectrum is used as a viewing window on the inverse transformation plane, through which the object is visible in the preceding space. The mobility of the viewer(s) is achieved by tracking the viewing window. The invention can be advantageously used in the television, multimedia, games and construction fields, in military and medical technology, in addition to other economic and social areas.

Light field display system based amusement park attraction

A light filed (LF) display system for displaying holographic content to viewers in an amusement park (e.g., as part of an amusement park ride). The LF display system in an amusement park includes LF display modules tiled together to form an array of LF modules. In some embodiments, the LF display system includes a tracking system and/or a viewer profiling module. The tracking system and viewer profiling module can monitor and store characteristics of viewers on the amusement park ride, a viewer profile describing a viewer, and/or responses of viewers to the holographic content during the amusement park ride. The holographic content created for display on an amusement park ride can be based on any of the monitored or stored information.

Device for reconstructing video holograms

The device has an optical system with a light source(s) and lens. The video hologram has cells, e.g. in a matrix, with an opening(s) per cell of controlled amplitude/phase and an observation plane. An observation window in the observation plane at a periodicity interval of the reconstruction as a Fourier transform of the video hologram enables viewing of a three-dimensional scene. The window size is not greater than the periodicity interval. The device has an optical system consisting of at least one real or virtual point- and/or line-shaped, adequately coherent light source (1) and a lens (2) and the video hologram (3) consists of cells in a matrix or other regular arrangement with at least one opening per cell of controlled amplitude and/or phase and an observation plane at the location of the light source image. An observation window (5) is located in the observation plane at a periodicity interval of the reconstruction as a Fourier transform of the video hologram for observation of a three-dimensional scene (6). The size of the window is not greater than the periodicity interval.

Optical security device

A holographic effect generating structure (HEGS), either stand alone or integrated with a security diffractive image, generates a holographic optically varying image by a process of diffraction of light, this image under white light illumination generates a smoothly and continuously variable structureless optically variable apparent motion effect which moves along a pre-determined track within pre-determined limits, the device characterized that it generates 3 planes of images under white light illumination—an image plane image located at or near the image plane corresponding to the real plane of the device which defines the predetermined movement track of the apparent motion effect and its bounds, a second virtual image plane situated away from the image plane of the device forming a virtual viewing zone corresponding at which an observer would be positioned to observe the visual effect and a third image plane, which defines a region where all the light rays from the image plane artwork to the viewing zone pass through or appear to originate from which defines the defines the viewing track of the apparent motion effect.

Hologram Calculation

Systems and methods of determining a hologram of an image for a system comprising a display device and viewing system are disclosed. Some embodiments implement a multi-stage procedure comprising (i) determining a first complex light field at an entrance pupil of the viewing system, (ii) determining a second complex light field at a sensor plane of a sensor of the viewing system, (iii) determining a third complex light field at the entrance pupil, and (iv) determining a fourth complex light field at the display plane. Some embodiments include extracting a hologram from a data set corresponding to the fourth complex light field.

Combined light modulation device for tracking users

For comfortable viewing of a 3-D scene at various viewing angles, a display having a large tracking range for a variable viewer distance is required. A controllable light-influencing element deflects light in coarse steps in a viewer range. Within said steps, the light is deflected by a further controllable light-influencing element continuously or with fine gradation. The light modulation device is suitable in holographic or autostereoscopic displays for guiding the visibility ranges of the image information to be displayed so as to follow the eyes of the viewers.

Video hologram and video hologram reproducing apparatus

Image projector

Image projector

Method and device for computing computer-generated video holograms

Optical security device

Holographic display method and holographic display device

Disclosed are a holographic display method and a holographic display device. The holographic display method includes: acquiring an area of Nth diffraction order corresponding to an eye position; according to the area of Nth diffraction order, calculating a holographic complex amplitude distribution corresponding to a window of Nth diffraction order to obtain window hologram information, a function of the holographic complex amplitude distribution being expressed by C(m,n)=A(m,n)*exp[−iφ(m,n)/N]; encoding the window hologram information; and according to the encoded window hologram information, loading the encoded window hologram information in the area of Nth diffraction order to display a hologram.

Image projector

Device for displaying a hologram

Vorrichtung zum Anzeigen von Hologrammbildern, mit:einer Hologrammanzeigetafel (10) zum Wiedergeben von Licht, das die Hologrammbilder aufweist, an einen Beobachter;einer Erfassungskamera (90) zum Erfassen einer Position des Beobachters;einem Deflektor (30) zum Ausbilden eines Prismenmusters, um das Licht entsprechend einem Neigungswinkel basierend auf der erfassten Position des Betrachters zu brechen; undeinem Deflektortreiber (60) zum Liefern einer Treiberspannung entsprechend dem Neigungswinkel zum Ausbilden des Prismenmusters,wobei der Deflektor (30) umfasst:eine Vielzahl von ersten Elektroden (33), die entlang einer ersten Richtung verlaufen und die in N Elektrodengruppen unterteilt sind, wobei jede Elektrodengruppe K erste Elektroden (33) aufweist;eine Vielzahl von K Verbindungselektroden (331), die entlang einer zweiten Richtung verlaufen, die die erste Richtung schneidet, wobei jeweils eine der K Verbindungselektroden (331) mit einem Ende der gleich nummerierten ersten Elektrode (33) von jeder der N Elektrodengruppen verbunden ist, wobei ein Ende von jeder der Verbindungselektroden (331) einen Kontaktfleckbereich (PAD) ausbildet;eine Vielzahl von Verbindungsleitungen (333), wobei jeweils eine der Verbindungsleitungen (333) mit dem anderen Ende der gleich nummerierten ersten Elektrode (33) von jeder der N Elektrodengruppen verbunden ist; undeine zweite Elektrode (34), die der Vielzahl der ersten Elektroden (33) mit einer Flüssigkristallzelle zwischen ihnen gegenüberliegt,wobei der Deflektortreiber (60) eingerichtet ist, um die Treiberspannung an jede der K Verbindungselektroden (331) monoton ansteigend oder monoton absteigend mit der Nummer der Verbindungselektroden (331) anzulegen, um das Prismenmuster auszubilden, um das Licht zu brechen, oder um null anzulegen, um das Licht ohne Brechung zu übertragen. An apparatus for displaying hologram images, comprising: a hologram display panel (10) for displaying light having the hologram images to an observer; a ...