Data protection system

The present invention provides systems and methods for logically organizing data for storage and recovery on a data storage medium using a multi-level format. The present invention also provides systems and methods for protecting data stored on data storage medium so that the data may be recovered without errors.

Optical information recording and reproducing method and device

Disclosed is an optical information recording and reproducing device capable of recording an interference fringe pattern as a hologram in an optical information recording medium, the interference fringe pattern being formed by a signal beam superimposed with signal information and a reference beam, and also capable of reproducing the signal information from the optical information recording medium, the device having a light source unit to emit light, a light splitting unit to split the light into the reference beam and the signal beam, a spatial light modulation unit to superimpose the signal information on the signal light, and a light detection unit to detect an image reproduced by the reference beam, wherein information about defects on the spatial light modulation unit is recorded in the optical information recording medium.

DATA PROTECTION SYSTEM

Systems and methods for logically organizing data for storage and recovery on a data storage medium using a multi-level format are described. Embodiments include systems and methods for protecting data stored on a data storage medium so that the data may be recovered without errors. 1. A method of storing data comprising:creating a first partition in a data storage medium, the first partition comprising a first contiguous subdivision of the data storage medium within which all data is written in one format and at one density;receiving a first logical block from a host, the first logical block including first data;writing the first data to the data storage medium within the first partition;creating a first structure that describes a host defined logical block address of the first data and a physical address of the first data in the data storage medium;creating a second partition in the data storage medium, the second partition comprising a second contiguous subdivision of the data storage medium within which all data is written in one format and at one density;writing the first structure to the storage medium within the second partition.writing within the first partition, an error correction code for the first data; and writing within the second partition, an error correction code for the first structure, wherein error correction within the first partition differs from error correction within the second partition in either or both of (i) type of error correction code, and (ii) amount of data redundancy.2. The method of claim 1 , further comprising:creating a second structure that describes the host defined logical block address of the first data; andwriting the second structure to the storage medium within the first partition.3. The method of claim 2 , further comprising:creating a third partition in the data storage medium, the third partition comprising a third contiguous subdivision of the data storage medium within which all data is written in one format and at ...

Optical-information recording/reproducing apparatus and optical-information recording/reproducing method

An optical-information recording/reproducing apparatus of the present invention is capable of carrying out position detection of a reproduction image even if reproduction image data with incomplete alignment marks (markers) is obtained. A relative correlation value is calculated from a first correlation value retained by a first correlation-value retaining unit and a second correlation value retained by a second correlation-value retaining unit, and pass/fail of a position detection result of the marker is judged according to the relative correlation value. The pass/fail of the position detection result is judged by mutually comparing the detection positions of the markers judged as passes by the relative correlation-value judgement, the positions of the markers judged as fail by the relative correlation-value judgement or the mutual position judgement is complemented, and the position of two-dimensional data is detected based on the pass-judged markers and the complemented markers.

Optical information reproducing device

An optical information reproducing device, takes advantage of holography and can precisely detect a well-known pattern disposed at a prescribed location within a page and is used for correcting position deviation, rotation deviation, and magnification deviation. The optical fiber reproducing device includes a detection unit that detects the position information of a marker as a well-known pattern from a page as a 2-dimensional reproduction signal from a hologram, a detection error position estimating unit that estimates presence/absence of detection error in the position information of the marker and estimates the position where the detection error occurs if there is detection error, a position correcting unit that corrects the marker position information of the detection error position specified by the detection error position estimating unit, and a signal detection unit that detects each signal from within the page based on the corrected marker position information.

METHOD FOR DETERMINING WORKING GAP, AND RECORDING DEVICE

A method for determining a working gap includes a first recording step for ejecting ink from a recording head onto a first recording medium to record a test pattern, a first imaging step for capturing the test pattern recorded on the first recording medium in each of a state where a distance between the recording head and the first recording medium is a first distance, and a state where a distance between the recording head and the first recording medium is a second distance, a function calculating step, a second recording step for recording the test pattern on a second recording medium, a second imaging step for capturing the test pattern recorded on the second recording medium, and a working gap determining step for determining, based on the number of pixels of the captured test pattern and a function, a distance between the recording head and the second recording medium. 1. A method for determining a working gap , comprising:a first recording step for ejecting ink from a recording head onto a first recording medium having a known medium thickness to record a test pattern;a first imaging step for capturing the test pattern recorded on the first recording medium in each of a state where a distance between the recording head and the first recording medium is a first distance, and a state where a distance between the recording head and the first recording medium is a second distance;a function calculating step for calculating, based on the number of pixels of the test pattern captured at the first distance and the number of pixels of the test pattern captured at the second distance, a function to determine the distance from the number of pixels of the captured test pattern;a second recording step for recording the test pattern on a second recording medium;a second imaging step for capturing the test pattern recorded on the second recording medium; anda working gap determining step for determining, based on the number of pixels of the captured test pattern and the ...

HOLOGRAM RECORDING AND PLAYBACK DEVICE AND PLAYBACK POSITION DEVIATION DETECTION METHOD

A hologram recording and playback device and a playback position deviation detection method to detect the relative position deviation between the hologram and reference light during playback with high sensitivity. The hologram recording and playback device records as a servo page, signal light added with two-dimensional pattern data having a cycle induced by the spatial modulator in a least a portion of the data. During playback, reference light is emitted onto the servo page, and an optical detector mounted on the periphery of a light transmittance unit of a spatial filter detects the playback light, and detects the position deviation versus the servo page. By utilizing a check pattern for example as the two-dimensional pattern, a diffraction peak can be generated on the periphery of the light transmittance unit and position deviation can be detected with high sensitivity. 1. A hologram recording and playback device that makes reference light and signal light interfere , records the obtained interference fringe as a hologram on an optical information recording medium , and plays back the recorded hologram by emitting reference light onto an optical information record medium , the hologram recording and playback device comprising:a light source that emits the light beam;a branching element that branches the light beam into the reference light and the signal light;a spatial light modulator that adds data for recording to the signal light;a spatial filter that includes a light transmittance unit to transmit the signal light attached with data;an objective lens that emits the signal light that passes through the spatial filter onto the optical information recording medium;a relay lens that is mounted between the spatial light modulator and the objective lens and converges the signal light onto the position of the spatial filter;a reference beam optical system for reproducing that emits the reference light onto the optical information recording medium;an imaging element ...

RECORDING/REPRODUCING APPARATUS AND RECORDING MEDIUM

This recording/reproducing apparatus that records or reproduces information by radiating light to a recording medium is provided with: a medium rotating unit that rotates the recording medium; a moving unit having a movable unit that is capable of moving within a predetermined plane; a rotation angle detecting unit that detects a rotating angle of the recording medium using an angle detection mark that is provided on the recording medium; a position detecting unit that detects a position of the recording medium using an eccentricity detection mark that is provided on the recording medium; and a member for fixing the rotation angle detecting unit and the position detecting unit. With respect to the member, the movable unit relatively moves within a plane substantially parallel to the recording surface of the recording medium, and the medium rotating unit is fixed to the movable unit. 2. The recording/reproducing apparatus according to claim 1 , whereinthe angle-detection-dedicated mark has a concentric pattern capable of detecting the rotational angle,the eccentricity-detection-dedicated mark has a concentric pattern provided at a radial section different from the radial section of the angle-detection-dedicated mark.3. The recording/reproducing apparatus according to claim 1 , whereinthe angle-detection-dedicated mark and the eccentricity-detection-dedicated mark are identical to each other,the identical mark has a concentric pattern, the concentric pattern being capable of detecting the rotational angle.4. The recording/reproducing apparatus according to claim 1 , further comprising:a medium-rotation control unit for performing the positioning of the recording medium at a predetermined rotational angle by controlling the medium rotation unit on the basis of the output signal from the rotational-angle detection unit; andan eccentricity compensation unit for controlling the displacement unit on the basis of the output signal from the position detection unit, and ...

Data recording device and data recording method

Data storage device and method

Holographic recording medium and pickup for this medium, holographic storage system, and method for recording data on this medium and reading data from this medium

본 발명은 기록된 홀로그램을 위한 추가 정보를 저장하기 위해 적응된 홀로그래픽 기록 매체(9) 및 이 홀로그래픽 기록 매체(9)와 함께 사용을 위한 홀로그래픽 스토리지 시스템을 위한 홀로그래픽 픽업(1)에 대한 것이다. 본 발명에 따라, 홀로그래픽성 기록 매체(9)는, 홀로그램을 저장하는 홀로그래픽 레이어(94)와, 상기 홀로그래픽 기록 매체에 대한 홀로그램의 기록 및/또는 판독을 위한 광빔을 포지셔닝하는 서보 레이어(92)를 구비하며, 여기서, 서보 레이어(92)는 기록가능한 또는 재기록가능하다. 이러한 홀로그래픽 기록 매체(9)와의 함께 사용을 위한 홀로그래픽 픽업(1)은 홀로그래픽 기록 매체(9)의 서보 레이어(92)에 추가 데이터를 기록하기 위한 광원(13)을 포함한다. The invention relates to a holographic recording medium 9 adapted for storing additional information for recorded holograms and to a holographic pickup 1 for a holographic storage system for use with the holographic recording medium 9. It is about. According to the invention, the holographic recording medium 9 comprises a holographic layer 94 for storing holograms and a servo layer for positioning a light beam for recording and / or reading of holograms on the holographic recording medium. 92, wherein the servo layer 92 is recordable or rewritable. The holographic pickup 1 for use with this holographic recording medium 9 comprises a light source 13 for recording additional data on the servo layer 92 of the holographic recording medium 9. 홀로그래픽, 스토리지, 픽업, 홀로그램 Holographic, storage, pickup, hologram

Optical information reading apparatus and method using low density parity check code

본 발명은 저밀도 패리티 체크 부호의 맵핑 방법 및 이를 이용한 광정보 재생장치에 관한 것으로, 광원; 상기 광원에서 방출되는 광을 기준광과 신호광으로 분리하는 광분할기; 상기 신호광에 데이터를 적재하는 공간 광변조기; 상기 기준광에 의해 기록매체에서 재생되는 재생광을 검출하는 검출기;를 구비하며, 상기 데이터를 상기 LDPC 코드로 부호화하고, 상기 기록매체에 저장되는 광정보 데이터페이지의 데이터블록에 맵핑시켜 상기 공간변조기로 제공하는 데이터 인코딩부 및 상기 검출기에서 검출되는 광정보의 데이터페이지를 디맵핑시키고, 디맵핑된 상기 데이터페이지의 상기 데이터블록을 상기 LDPC 코드로 복호화하는 데이터 디코딩부를 구비하며, 이에 따라 어느 한 LDPC 코드블록 내에 부정확한 확률정보가 뭉치는 것을 분산시키고, 적절한 마크의 배치를 통해 정확한 확률정보를 구할 수 있도록 함으로써, 특정 LDPC 코드에 해당하는 픽셀의 평균적인 정확도를 향상시켜 디코딩 실패율을 최소화하여 디코딩 성능을 향상시킬 수 있는 효과가 있다. The present invention relates to a method for mapping a low density parity check code and an optical information reproducing apparatus using the same, including: a light source; A light splitter separating the light emitted from the light source into a reference light and a signal light; A spatial light modulator for loading data into the signal light; And a detector for detecting reproduction light reproduced on the recording medium by the reference light, and encoding the data into the LDPC code and mapping the data to a data block of an optical information data page stored in the recording medium to the spatial modulator. And a data decoding unit to demap the data page of the optical information detected by the detector, and to decode the data block of the demapped data page into the LDPC code. By distributing the aggregated inaccurate probability information in the block and obtaining accurate probability information by arranging appropriate marks, it improves the average accuracy of pixels corresponding to a specific LDPC code and minimizes the decoding failure rate to improve decoding performance. There is an effect that can be improved.

Recording / reproducing method, recording medium, and recording / reproducing apparatus

Method for detecting optical information location, optical information detector and optical information format

An optical information location detecting method, an optical information detector, and an optical information format are provided to classify images obtained from a mark detection area into plural pixel groups according to pixel matching, and to detect marks according to optical distributions of the pixel groups, thus reliable location detection of optical information is available. Images of a mark detection area for detecting marks of a data page stored in an optical information storage medium are obtained through predetermined pixel matching(S1). The obtained images of the mark detection area are classified into plural pixel groups by considering the pixel matching(S2). It is decided whether the marks are detected by using optical distributions of the classified pixel groups(S3-S5).

Optical unit, control method, and optical information recording / reproducing apparatus

光学ユニットは、記録層と焦点制御用基準面とを有する光記録媒体にレーザ光を照射する光学系を有し、該光学系が、第一の光源から出射する記録再生用ビームを前記記録層内に集光し、第二の光源から出射する焦点制御用ビームを前記焦点制御用基準面上に集光する対物レンズと、前記記録再生用ビームの光路中に設けられ、前記記録再生用ビームの集光位置を前記記録層の厚さ方向に離散的に変化させることが可能な第一のレンズ系と、前記記録再生用ビーム及び前記焦点制御用ビームに共通の光路中に設けられ、前記記録再生用ビーム及び前記焦点制御用ビームの集光位置を前記記録層の厚さ方向に連続的に変化させることが可能な第二のレンズ系とを有する。 The optical unit has an optical system for irradiating an optical recording medium having a recording layer and a reference surface for focus control with a laser beam, and the optical system emits a recording / reproducing beam emitted from a first light source. An objective lens that condenses the light for focusing on the light source and is focused on the reference surface for focus control, and the recording / reproducing beam. Is provided in a common optical path for the recording / reproducing beam and the focus control beam, the first lens system capable of discretely changing the light collection position in the thickness direction of the recording layer, And a second lens system capable of continuously changing the focusing positions of the recording / reproducing beam and the focus control beam in the thickness direction of the recording layer.

Holographic digital data system and method for compensating recording image's unmatching therefor

본 발명은 홀로그래픽 디지털 데이터 시스템 및 이의 재생된 이미지의 비매칭 보정 방법에 관한 것으로, 특히 본 발명의 시스템은 광원에서 신호광과 기준광을 분리하는 광 분리기와, 광 분리기에서 분리된 신호광에 홀로그래픽 디지털 데이터 패턴과 서로 다른 인텐시티를 갖는 다수의 픽셀로 구성된 얼라인 마크를 함께 입력하여 변조하는 공간 광 변조기와, 광 분리기에서 분리된 기준광을 소정의 각도로 반사하는 회전 미러와, 회전 미러의 기준광만이 저장 매체에 입사되어 저장 매체로부터 홀로그래픽 디지털 데이터 패턴과 함께 기록된 얼라인 마크를 재생한 이미지를 촬영하는 CCD 어레이와, CCD 어레이로부터 출력된 신호중에서 얼라인 마크를 검출하여 얼라인 마크의 픽셀과 CCD 픽셀 사이의 미스 얼라인에 따른 비매칭 여부를 판단하고 이를 보정하는 수단을 포함한다. 그러므로 본 발명은 공간 광 변조기를 이용하여 저장 매체에 얼라인 마크를 삽입한 홀로그래픽 디지털 데이터를 기록하고, 이를 재생한 이미지에서 얼라인 마크를 검출한 후에 얼라인 마크의 픽셀과 CCD 픽셀간의 미스 얼라인을 검출함으로써 재생 이미지와 CCD 픽셀의 비매칭을 보다 정확하게 측정할 수 있다. The present invention relates to a holographic digital data system and a method of mismatching correction of a reproduced image thereof. In particular, the system of the present invention includes an optical splitter for separating signal light and reference light from a light source, and a holographic digital to signal light separated from the optical splitter. Only a spatial light modulator for inputting and modulating an alignment mark composed of a plurality of pixels having different intensities with a data pattern, a rotation mirror for reflecting the reference light separated from the optical splitter at a predetermined angle, and a reference light of the rotation mirror A CCD array that captures an image of an alignment mark incident on the storage medium and recorded with a holographic digital data pattern from the storage medium, and an alignment mark is detected from signals output from the CCD array, Determine mismatches due to misalignment between CCD pixels and correct them Means for doing so. Therefore, the present invention records holographic digital data in which an alignment mark is inserted into a storage medium using a spatial light modulator, and detects an alignment mark in the reproduced image, and then misaligns the pixel between the alignment mark pixel and the CCD pixel. By detecting phosphor, mismatching of the reproduced image and CCD pixels can be measured ...

Signal recording method, phase difference detection circuit and information device

정보기록매체에 적응된 신호기록방법 및 기록재생신호와 재생신호 사이의 위상차를 검출하는 검출회로 및 매체상의 데이타의 다음의 기록을 위한 조건을 결정하도록 위상차를 사용한 정보장치에 관한 것으로서, 상변화 광디스크의 최적기록파워레벨을 결정하는 데 적합한 시험 라이트방식을 제공하기 위해, 단일패턴 또는 랜덤패턴을 기록하여 재생신호에서 클럭과 데이타에지 사이의 차를 검출하고 기록의 임계값파워를 구하고 이것을 정수배해서 기록파워의 최적화를 실행할 수 있도록 구성하였다. 이와 같은 구성으로 하는 것에 의해, 상변화 광디스크특성에 적합한 시험 라이트를 가능하게 하여 최적기록조건을 신속정확하고 용이하게 구할 수 있는 방법 및 장치를 제공하여 안정하고 고밀도인 정보기록/재생동작을 실현할 수 있다는 효과가 얻어진다.

Optical information recording/reproducing device and method

本发明提供光信息记录再现装置和方法、光信息记录介质，在利用全息术的光信息记录再现装置中，能够对装置间的参考光角度的零点和单位量的误差进行修正，进行装置间兼容性高的记录再现。其技术方案在于，检测适合再现记录在光信息记录介质内的角度修正用数据的参考光角度，基于该检测角度信息对记录或再现时的参考光角度的零点和单位量进行修正。

Hologram recording / reproducing apparatus, hologram reproducing apparatus and method, and computer program

Recording medium, recording and reproducing method and device

记录介质、记录和再现方法以及记录和再现装置。一种记录介质，具有能够使用光照射进行信息的记录和再现并由基底承载的记录层。该记录介质包括引导层，该引导层具有多个引导轨道，从物镜聚焦的光束光斑通过该记录层沿各个引导轨道移动，以第一间距设置该多个引导轨道。该记录介质包括引导轨道转换区域，其设置在所述引导层上，并且在比所述引导轨道短的范围内具有至少一条轨道，该至少一条轨道沿所述引导轨道的延伸方向平行地设置在所述多个引导轨道之间，所述多个引导轨道沿垂直于所述引导轨道的方向彼此相邻。

Hologram recording / reproducing apparatus and hologram recording / reproducing method

Optical recording media, method and apparatus for recording/reproducing for the same

신호광과 참조광의 상호 간섭을 통해 형성되는 간섭 패턴으로 데이터를 기록하는 광 기록 매체, 그 기록/재생 방법 및 장치가 개시된다. 본 발명에 따른 광 기록 매체는 소정의 데이터가 기록되는 적어도 하나의 기록층 중 일부 영역의 두께를 다른 영역에 비하여 작게 형성하고, 상대적으로 두께가 큰 영역에는 기록 데이터를 저장하게 하며, 상대적으로 두께가 작은 영역에는 기록 및/또는 재생 조건을 구비하는 부가 정보를 저장하게 하는 것을 특징으로 한다. An optical recording medium for recording data in an interference pattern formed through mutual interference of signal light and reference light, and a recording / reproducing method and apparatus thereof. The optical recording medium according to the present invention forms the thickness of a portion of the at least one recording layer in which predetermined data is recorded smaller than that of other regions, and stores the recording data in a region having a relatively large thickness. It is characterized by storing additional information having recording and / or reproducing conditions in a small area. 홀로그래피 기록 매체, 선택도(selectivity) Holographic recording medium, selectivity

Optical disc apparatus and focus position control method

Optical information processing apparatus and method for controlling tilting using the same

본 실시예에 따른 광정보 처리장치는 광원, 상기 광원에서 제공되는 광을 설정된 각도로 반사시키는 회전미러, 상기 회전미러에서 반사되어 저장매체로 진행하는 상기 광을 굴절시켜 틸트 제어가 수행되도록 하는 보정용 프리즘, 상기 보정용 프리즘을 회전시키는 구동기를 구비한 것으로, 본 실시예에 따른 광정보 처리장치는 홀로그램이 기록된 저장매체에 입사되는 기준광의 틸팅 제어가 가능하도록 하고, 더욱이 서로 직각인 틸트 방향에 대해서도 틸팅 제어가 가능하도록 하여 홀로그래픽 광정보 처리장치에 기록된 재생광을 재생시키는 효율을 향상시키는 효과가 있다. The optical information processing apparatus according to the present embodiment includes a light source, a rotating mirror that reflects light provided from the light source at a predetermined angle, and a compensation unit that corrects tilt control by refracting the light reflected on the rotating mirror, A prism and a driver for rotating the correction prism. The optical information processing apparatus according to the present embodiment can control the tilting of the reference light incident on the storage medium on which the hologram is recorded, and furthermore, The tilting control can be performed to improve the efficiency of reproducing the reproduction light recorded in the holographic optical information processing apparatus.

Apparatus and method for recording optical information, apparatus and method for reproducing optical information, and apparatus and method for recording/reproducing optical information

Hologram recording medium and apparatus for and method of recording data on the recording medium

Devices and methods for data storage

FIELD: information technologies. SUBSTANCE: storage device comprises a plastic substrate, having multiple volumes arranged in the form of paths along multiple vertically packaged layers. The substrate demonstrates a non-linear optically sensitive functional characteristic, which is a threshold functional characteristic. The device comprises multiple micro-holograms, every of which is contained in the appropriate one of the volumes. Availability or absence of a microhologram in each of volumes characterises a stored data area. EFFECT: expansion of allowance to misalignment of recoding optics. 36 cl, 40 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 459 284 (13) C2 (51) МПК G11B G02B 7/0065 (2006.01) 5/32 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2007138218/28, 15.03.2006 (24) Дата начала отсчета срока действия патента: 15.03.2006 (56) Список документов, цитированных в отчете о поиске: US 6288804 B1, 11.09.2001. US 6020985 A, 01.02.2000. US 2004096776 A1, 20.05.2004. SU 1833012 A1, 27.07.1996. 2 4 5 9 2 8 4 R U (86) Заявка PCT: US 2006/009249 (15.03.2006) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 16.10.2007 (87) Публикация заявки РСТ: WO 2006/101873 (28.09.2006) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Ю.Д.Кузнецову, рег.№ 595 (54) УСТРОЙСТВА И СПОСОБЫ ХРАНЕНИЯ ДАННЫХ (57) Реферат: Предложены устройства хранения данных и способы хранения и удаления данных. Устройство хранения включает в себя пластиковую подложку, имеющую множество объемов, расположенных в форме дорожек вдоль множества вертикально упакованных слоев. Подложка проявляет нелинейную оптически чувствительную функциональную характеристику, которая является пороговой функциональной характеристикой. Устройство содержит множество микроголограмм, каждая из которых содержится в соответствующем одном из объемов. Наличие или отсутствие ...

Optical recording method, optical recorder, optical recording medium and optical recording/reproducing method

Excellent optical recording method, optical recorder and an optical recording medium in which efficiency of recording/reproduction is high when recording/reproduction or focus/tracking control is performed using a laser beam, shift of the optical axis of a plurality of laser beams due to error of an optical recorder/reproducer has no effect, and layer structure of the optical recording medium itself is simplified. The optical recording method comprises a pattern position detecting step for irradiating an optical recording medium including a layer for recording information by utilizing holography and a pattern having at least track information and address information with any one of information light and reference light and detecting the pattern position from reflected light, and an interference image recording step for shifting the position of the optical axis of information light and reference light to a position other than the pattern position based on the detected pattern position information, forming an interference image by irradiating the recording layer with the information light and reference light and recording the interference image on the recording layer.

Apparatus and method for optical disk reproduction

An apparatus of the present invention is an optical disk apparatus for irradiating with a laser beam an optical disk on which address marks (100) are recorded at intervals based on a pulse width modulation method and for reproducing data from a reproduced signal based on reflected light. The apparatus includes: a pulse signal reproduction section for producing a reproduced pulse signal (ADR) from the reproduced signal based on a threshold value (VTH); a threshold value production section for producing the threshold value based on the reproduced pulse signal; and a gate signal production section for producing an address gate signal (ADRG) at a timing when the address mark is reproduced.

System for recording and reproducing holographic storage which has tracking servo projection

Optical information recording method and apparatus using the same

An optical information recording method includes the following steps. A converting step is converting a light beam into an information beam carrying information by using a spatial beam modulator. A focusing step is focusing the information beam on an optical information recording medium including an information recording layer. An irradiating step is irradiating the optical information recording medium with a reference beam and the information beam so that the reference beam and the information beam intersect with each other on the information recording layer by using an optical component. A rotating step is rotating the optical information recording medium or the optical component by using a drive unit for performing angle-multiplex recording. A management information recording step is recording management information at two or more relative angles having an angle interval smaller than twice at least a first null angle.

Method of and apparatus for recording/reproducing data on/from holographic storage medium

A method of and apparatus for recording/reproducing data on/from a holographic storage medium. The method of recording data on a holographic storage medium in which holograms containing data by interference between a signal light and a reference light are recorded in pages includes modulating additional information including information about a page so as to keep the rate of 0s or 1s in binarized data of the additional information constant and recording the page having the modulated additional information added thereto on the holographic storage medium.

Servosystem for many hot spots registration of holographic replication system

本发明涉及用于全息复制系统的多光斑配准的伺服系统。本技术提供用于控制使用多个反向传播光束将显微全息图记录在全息光盘的多个数据光道之上的方法和系统。在记录过程期间全息光盘的缺陷或者光盘的移动可使信号光束偏离目标数据光道。在一些实施例中，将跟踪光束导向光盘的参考层。参考光束与参考层的目标凹槽的偏离可指示跟踪误差。检测器可检测跟踪光束的反射，并且响应所检测跟踪误差而生成误差信号。伺服机械装置可致动(例如径向、切向或轴向平移、旋转和/或倾斜)一个或多个光学组件以补偿跟踪误差，通过这些光学组件发射反向传播光束。

Hologram recording carrier

一种通过光照射进行信息的记录或再生的全息记录载体，其由以下部分构成：全息记录层，其在内部作为衍射光栅保存可干涉性的参照光和信号光的成分所产生的光学干涉图案；反射层，其被层叠于全息记录层的光入射侧的相反侧，而且具有按照与衍射光栅的记录间隔相等的间隔配置的非反射部。

Optical information recording medium, information recording method and information recording system

An optical information recording medium is provided with a substrate having a pregroove formed on one main plane; a reflecting layer arranged on the one main plane of the substrate and reflecting an access controlling laser beam; a selective reflecting layer arranged on the reflecting layer, transmitting the access controlling laser beam and reflecting a recording laser beam; a recording layer arranged on the selective reflecting layer for having information recorded thereon by the recording laser beam; and a reflection preventing layer arranged on the recoding layer. On the substrate, a dummy groove having a shape similar to that of the pregroove is formed on forming regions adjacent to an effective access region on the one main plane.

Hologram recording medium and apparatus for and method of recording data on the recording medium

A hologram recording medium and apparatus for and method of recording data on the recording medium. The recording medium is a card shaped hologram recording medium having an auxiliary recording area at a periphery of a main or user data recording area. Address information is recorded along one or two sides of the main or user data recording area. The recording medium may also be divided into a plurality of user data areas each having associated address data on the one or two sides. A recording location is determined by reference to the address information.

Disc structure for bit-wise holographic storage

An optical disc for micro-holographic data storage, including: optically-enabled material configured to store holographic data; guide grooves; a first coating disposed on the guide grooves and configured to reflect a tracking beam and to transmit a read or record beam; and a second coating disposed to cover the guide grooves and disposed on the first coating.

Optical recording medium, method of manufacturing optical recording medium, recording method and reproducing method

本发明涉及光学记录介质、制造光学记录介质的方法、记录方法及再现方法。该光学记录介质包括记录层及中间层。记录层包括具有预定光栅间距的衍射光栅，通过将透明且折射率略微不同的的第一层与第二层交替层叠来获得该衍射光栅。中间层透明且具有比记录层更大的厚度。在该光学记录介质中，记录层与中间层被交替层叠。

Method for detecting in holographic digital data storage system

본 발명은 행 방향으로 n픽셀(예로, 8픽셀) 단위 묶음으로 세기의 합을 계산한 최대 위치와, 기준 패턴 벡터와 리트라이브된(retrieved) 패턴 벡터와의 차이의 절대값을 계산한 최소 위치를 기반으로 이미지 데이터의 시작 열과 시작 행인 시작 위치를 추정하기 위한 것으로, 이를 위한 본 발명은 마크 패턴의 행 방향으로 임의의 픽셀 단위 묶음으로 세기의 합을 계산하는 제1단계와, 마크 패턴의 기준 패턴 벡터와 리트라이브된(retrieved) 패턴 벡터와의 차이의 절대값을 계산하는 제2단계와, 제1단계에 의해 계산된 세기의 합에 해당되는 최대 위치와, 제2단계에 의해 계산된 절대값에 해당되는 최소 위치를 기반으로 정보 영역인 이미지 데이터의 시작 열과 시작 행에 대한 위치를 추정하는 단계를 포함한다. 따라서, 재생 이미지의 정보 영역의 위치가 바뀔 때 고속으로 전송되는 이미지 데이터로부터 기존 메모리 버퍼 없이 선형 계산만으로 정보 영역의 위치를 찾을 수 있는 효과를 갖고 있다. According to the present invention, the maximum position at which the sum of the intensity is calculated in a unit of n pixels (for example, 8 pixels) in the row direction, and the minimum position at which the absolute value of the difference between the reference pattern vector and the retrived pattern vector is calculated According to the present invention, a first step of calculating the sum of intensities in an arbitrary pixel unit bundle in the row direction of a mark pattern, and the reference of the mark pattern A second step of calculating an absolute value of the difference between the pattern vector and the retrived pattern vector, a maximum position corresponding to the sum of the intensity calculated by the first step, and an absolute value calculated by the second step Estimating a position of a start column and a start row of image data, which are information regions, based on a minimum position corresponding to the value. Therefore, when the position of the information region of the reproduced image is changed, the position of the information region can be found by linear calculation without an existing memory buffer from image data transmitted at high speed.

Optical recording medium, optical recording apparatus, optical recording method, and optical reproducing method

The present invention aims to provide an optical recording medium that is provided with a recording layer for recording information by holography, has an uncomplicated laminate structure, is capable of performing recording and reproducing control such as tracking control and is capable of high-density multiple recording, as well as an optical recording method, an optical recording apparatus and an optical reproducing method. To this end, the present invention provides an optical recording medium which is a transmission medium for recording information based on a holographic principle using an information beam and a reference beam and performing tracking control using a servo beam, the medium including at least a first substrate, a recording layer, a filter layer that selectively reflects the servo beam, and a second substrate being disposed in this order as viewed from the light irradiation side of the information beam and the reference beam.

Optical recording method, optical recording apparatus, optical recording medium, and optical recording / reproducing method

Information recording apparatus, information reproducing apparatus and recording media

An apparatus for recording information in an optical-information recording media by holography includes a signal-light irradiation unit, a reference-light irradiation unit, a reference light angle adjustment unit, and a positioning unit for positioning irradiation positions of the signal light and the reference light. The optical-information recording media is divided into N (N≧2) recording regions, M multiplexed information can be recorded in the respective recording regions by the reference light angle adjustment unit which changes the angle of the reference light at M angles (θ 1 , θ 2 , . . . , and θ M ) corresponding to a multiplexing number (M≧2), management information for the M multiplexed information is multiplexed and recorded in the same recording region as a-th information (1≦a≦M) with a reference light angle θa, and the management information on all the N recording regions are recorded at a common reference light angle.

Hologram recording medium, and recording apparatus and reproducing apparatus for the same

A hologram recording medium, a recording apparatus and a recording method for the same, and a reproducing apparatus and a reproducing method for the same. The hologram recording medium is formed of a data recording region and a servo information recording region to allow a laser beam to be precisely irradiated for recording data on the hologram recording medium. Accordingly, data may be precisely recorded and reproduced from the hologram recording medium.

Method for reproducing holographic information from an optical information recording medium

An XY array of sync bits and information bits is recorded in a recording medium through the use of holography. The sync bits are in parallel Y-direction-extending groups having an X-direction minimum inversion interval of 2 or more. The information bits are placed between the parallel Y-direction-extending groups of the sync bits. One of the parallel Y-direction-extending groups of the sync bits and ones of the information bits neighboring said one of the parallel Y-direction-extending groups of the sync bits are scanned to reproduce a Y-direction sync bit sequence and at least one Y-direction information bit sequence. The reproduced Y-direction sync bit sequence is re-sampled through the use of a digital phase locked loop to obtain corrected Y-direction sync bit frequency and phase. The Y-direction information bit sequence is re-sampled in response to the corrected Y-direction sync bit frequency and phase. The Y direction is vertical, horizontal, or halfway therebetween.

Hologram reproducing apparatus

A hologram reproducing apparatus includes a reference-light spatial-light modulating section that displays a reference light pattern for generating reference light, an image sensor that has pixels arrayed two-dimensionally that receive diffractive light generated by irradiating the reference light on a hologram recording medium, and a control unit that processes an electric signal from the image sensor and reproduces recording data. The control unit detects a predetermined area electric signal, detects a hologram electric signal, subtracts the predetermined area electric signal from the hologram electric signal to obtain a reproduced signal after noise reduction, and reproduces the recording data from the reproduced signal after noise reduction.

Information playback device

Hologram recording apparatus and method, computer program, and hologram recording medium

A hologram recording apparatus ( 300 ) records record information into a hologram recording medium ( 100 ) on which a hologram recording layer ( 11 ) and a position information recording layer ( 13 ). The hologram recording apparatus is provided with: a first recording device ( 101 ) for recording the record information into the hologram recording layer; and a second recording device ( 121 ) for setting an area portion of the position information recording layer in a recorded state, the area portion of the position information recording layer corresponding to an area portion of the hologram recording layer in which the record information is recorded.

Optical information recording apparatus and method, optical information reproducing apparatus and method, and optical information recording and reproducing apparatus and method

Data recording medium, recording method, playback method and playback apparatus

본 발명의 목적은 가라오케 시스템 전체를 보다 소형으로 구축하는 것이다. CD 크기의 디스크에는 주영상(604)으로서 가라오케 장면 동화상 정보가 디지탈 기록되고, 복수의 음성 스트림(603)에는 다른 복수의 가라오케 연주 정보가 디지탈 기록되며, 복수의 부영상 채널(602)에는 각 가라오케 연주 정보에 대응하는 가사 및 제목 정보가 디지탈 기록되어 있다. It is an object of the present invention to build a smaller karaoke system as a whole. Karaoke scene moving image information is digitally recorded as a main image 604 on a CD-size disc, and plural karaoke performance information is digitally recorded on a plurality of audio streams 603, and each karaoke is recorded on a plurality of sub-picture channels 602. Lyrics and title information corresponding to the performance information are digitally recorded.

Optical recording medium and method of manufacturing the same

An optical recording medium including: a first substrate having a groove on the side of an outer peripheral portion thereof; a second substrate in contact with the first substrate in the outer peripheral portion; and a recording layer being disposed in a gap between the first substrate and the second substrate and forming a void in cooperation with the first substrate at the portion of the groove.

Two-dimensional coding method

A two-dimensional coding method includes: using a two-dimensional image containing plural reference pixels each having a different brightness and data pixels representing data in accordance with brightness; and coding a binary sequence of plural bits to be recorded as a hologram by matching the brightness level of the data pixel based on the brightnesses of the plural reference pixels.

Method for accurately detecting and controlling position of optical head of optical disk, optical disk and device

本发明涉及一种光盘光头位置的精确检测及控制方法，属于光全息存储技术领域。本发明利用球面参考光束移位复用技术具有的窄移位选择性，在存储介质中设有一个包括x方向位置控制单元和y方向位置控制单元的与数据区域相分离的控制区域。与数据区域一样，将特殊图案的全息图记录在控制区域中，在读取数据时先将控制区域内的信息读取出来，根据由控制区域内全息图所读取的信息，光头相对于数据区域内全息图的位置便可以分别在x方向和y方向被检测出来，从而将参考光控制到该地址所示的正确位置上。

Hologram recording medium, hologram recording apparatus and method, and computer program

A hologram recording apparatus ( 300 ) is provided with: a recording device ( 100 ) for recording record information into a hologram recording medium ( 1 ); a measuring device ( 325 ) for measuring a time elapsed from when the recording of the record information is stopped to when the recording of the record information is restarted; a first controlling device ( 354 ) for controlling the recording device to multiplex-record the record information, if the measured elapsed time is shorter than a time length in which the record information can be multiplex-recorded; and a second controlling device ( 354 ) for controlling the recording device not to multiplex-record the record information, if the measured elapsed time is longer than the time length in which the record information can be multiplex-recorded.

Method of placing data signals onto a carrier; method and apparatus for the holographic recording and read-out of data

The invention concerns a method for the holographic recording and readout of data, in which an image of a two-dimensional data source (44) is recorded in a hologram on an optical medium (3), where the hologram is resulting from an interference in a Fourier-plane (50) associated to the image of the data source (44). In the method, a further Fourier-plane (51) is established in the imaging setup beside the Fourier-plane (50) of the hologram, and spatial filtering is performed in the further Fourier-plane (51) with an aperture. The recorded hologram is detected with a two-dimensional detector during the readout. The further Fourier-plane (51) is established in an object beam between the data source (44) and the hologram, and the size of the hologram and thereby the data density is adjusted with the size of the aperture positioned in the further Fourier plane (51). There is also disclosed an apparatus having a two-dimensional data source (44), and an optical system for imaging the data source through an object beam and reference beam onto an optical medium. The optical medium is positioned in the Fourier plane associated with the image of the data source (44). Beside the Fourier plane of the hologram, the optical system comprises a further Fourier plane (51) between the data source (44) and the hologram (9), and there is spatial filtering means in the further Fourier plane.

Hologram memory medium, apparatus and method of recording and/or reproducing information with respect to the hologram memory medium

A method of recording/reproducing information on/from a card-shaped hologram memory medium is provided in which an information recording/reproducing optical system can be conveniently controlled to increase a recording capacity of the card-shaped hologram memory medium. In the method, pieces of information are sequentially recorded in a data recording/reproducing area of the card shaped hologram memory medium along a predetermined route, while maintaining a predetermined distance between pieces of information.

Optical track format for holographic storage disk and encoding method thereof

본 발명은 홀로그래픽 저장 디스크의 트랙 포맷 및 이의 코딩 방법을 제공한다. 홀로그래픽 저장 디스크의 트랙 영역은 리드인 영역, 데이터 영역 및 리드아웃 영역을 포함하고, 데이터 영역 트랙 상에는 데이터 홀로그래픽 비트 마크 및 시작 마크가 설정되며; 데이터 홀로그래픽 비트 마크는 트랙에서 홀로그램의 판독 및 기록 위치를 표시하는 데 사용되고; 시작 마크는 트랙에서 데이터 기록 시작 위치를 표시하는 데 사용되며, 시작 마크는 주소 코딩 정보를 더 포함할 수 있다. 트랙 코딩 방법은 두 가지가 있는 바, (1) 2개의 연속적인 균열 사이의 트랙 길이를 이용하여 이진 코딩을 수행하고, "0"을 2개의 균열 상승단 사이의 거리가 T인 트랙으로 코딩하며, "1"을 2개의 균열 상승단 사이의 거리가 nT인 트랙으로 코딩하고; (2) 레벨 신호의 강도를 이용하여 이진 코딩을 수행하며, "1"을 균열에 대응되는 하이 레벨로 코딩하고, "0"을 다른 위치에 대응되는 로우 레벨로 코딩한다.

Hologram recording / reproducing system

可干渉性光から参照光と信号光とを生成する光生成手段と、参照光及び信号光のいずれか一方を光軸上に光軸を含む光束として、参照光及び信号光を互いに光軸上の異なる焦点に集光させ干渉させる干渉手段と、異なる焦点のうち対物レンズ光学系に近い焦点側に位置するホログラム記録層及び遠い焦点側に位置する反射層を有し、ホログラム記録層よりも対物レンズに近い位置又は反射層よりも対物レンズ光学系から遠い位置に位置するサーボガイド層を備えるホログラム記録担体と、ホログラム記録層から戻る光を受光する像検出手段と、光軸を含む光束と共軸にかつその有効径内にて可干渉性光とは異なる波長のビームサーボガイド層へ集光して、サーボガイド層から対物レンズ光学系を介して戻る光を受光して光電変換を行い、光電変換信号に応じて対物レンズ光学系を駆動するサーボ制御系とを有するホログラム記録再生システム。 Light generating means for generating reference light and signal light from coherent light, and one of the reference light and signal light as a light beam including the optical axis on the optical axis, and the reference light and the signal light on each other on the optical axis An interference means for condensing and interfering with different focal points, a hologram recording layer located on the focal side near the objective lens optical system and a reflecting layer located on the far focal side among the different focal points, and having an objective more than the hologram recording layer. A hologram record carrier having a servo guide layer positioned closer to the lens or farther from the objective lens optical system than the reflecting layer, an image detecting means for receiving light returning from the hologram recording layer, and a light beam including the optical axis. Condensed to the beam servo guide layer with a wavelength different from that of the coherent light within the effective diameter within the axis, receiving light returning from the servo guide layer through the objective lens optical system, and performing photoelectric conversion, Photoelectric Hologram recording and reproducing system having a servo control system for driving the objective lens optical system in accordance with the signal.

Light irradiation method, optical recording medium

Optical information recording and reproducing apparatus and method of optically recording and reproducing information

An optical recording and reproducing apparatus according to the present invention utilizes an angle multiplexing interfering method to record multiple pieces of recording data on an optical recording medium. Recording conditions for the multiple recording and management information such as addresses are recorded in the same book according to a coaxial interfering method. In a reproduction mode, the management information is read from a hologram formed according to the coaxial interfering method. The management information is utilized to quickly read the recording data from a hologram formed according to the angle multiplexing interfering method.

Method for determining working gap, and recording device

Hologram Recording/Reproducing Apparatus, Hologram Reproducing Apparatus and Method, and Computer Program

A hologram recording/reproduction device reproduces recording information from a holographic recording medium where interference fringes formed by a reference light and an object light corresponding to the recording information are recorded. The hologram recording/reproduction device includes: irradiation means for irradiating the reference light to a holographic recording medium; data generation means for generating detection information data (Ddet) according to the detection light generated by irradiation of the reference light; setting means for setting a target irradiation position of the reference light on the surface of the holographic recording medium according to the detection information data; and movement means for moving the irradiation means with respect to the holographic recording medium along its surface so that the reference light is irradiated to the target irradiation position.

Method and equipment for processing optical recording medium, and optical recorder/reproducer

Hologram recording apparatus and method, computer program, and hologram recording medium

A hologram recording apparatus ( 300 ) records record information into a hologram recording medium ( 100 ) on which a hologram recording layer ( 11 ) and a position information recording layer ( 13 ). The hologram recording apparatus is provided with: a first recording device ( 101 ) for recording the record information into the hologram recording layer; and a second recording device ( 121 ) for setting an area portion of the position information recording layer in a recorded state, the area portion of the position information recording layer corresponding to an area portion of the hologram recording layer in which the record information is recorded.

Apparatus and method for recording optical information, apparatus and method for reproducing optical information, and apparatus and method for recording/reproducing optical information

In a servo operation, position-controlling light, which is red light, is projected onto a recording medium so as to converge to a minimum diameter on a reflecting surface of the recording medium. In a recording operation, information light and recording-specific reference light, each of which is green light, are projected coaxially onto one side of an information recording layer of the recording medium so as to converge to a minimum diameter at an identical position located off the reflecting surface. Information is recorded in the information recording layer in the form of an interference pattern resulting from interference between the information light yet to impinge on the reflecting surface and the recording-specific reference light reflected by the reflecting surface and an interference pattern resulting from interference between the recording-specific reference light yet to impinge on the reflecting surface and the information light reflected by the reflecting surface.

Method for recording and reproducing holographic data and an apparatus therefor

A holographic recording and reproducing method for recording data in a holographic recording medium comprising a recording layer in which data are to be recorded as phase information of light by projecting a signal beam and a reference beam thereonto and a servo layer disposed on the opposite side of the recording layer as viewed in the direction of signal beam incidence on the holographic recording medium and having regions in which servo projections are formed by projecting the signal beam and the reference beam onto the holographic recording medium and reproducing holographic data from the holographic recording medium by projecting the reference beam onto the holographic recording medium, the holographic recording and reproducing method includes steps of setting an optical path of the signal beam so that the signal beam is projected onto other regions of the servo layer than the regions formed with the servo projections, setting an optical path of a servo beam different from that of the signal beam so that the servo beam is projected onto one of the regions of the servo layer in which the servo projections are formed after passing through an objective lens through which the signal beam passes and projecting the servo beam onto the servo layer along the thus set optical path of the servo beam.

Hologram recording medium, and recording apparatus and reproducing apparatus for the same

提供一种全息记录介质、用于该全息记录介质的记录设备和记录方法、以及用于该全息记录介质的再现设备和再现方法。所述全息记录介质由数据记录区和伺服信息记录区形成，以使激光束精确地照射从而将数据记录在全息记录介质上。因此，可将数据精确地记录在全息记录介质上并从该全息记录介质精确地再现数据。

Recording apparatus

A recording apparatus includes: a light-emitting/receiving unit which emits a recording beam, an ATS beam, and a position control beam toward an optical disc recording medium via a common object lens; a tracking mechanism which drives the object lens in a tracking direction parallel to a radial direction of the optical disc recording medium; a reference plane-side tracking error signal generation unit which generates a reference plane-side tracking error signal; a reference plane-side tracking servo signal generation unit which generates a reference plane-side tracking servo signal to cancel out a tracking error; a tracking driving unit which drives the tracking mechanism; an ATS-side tracking error signal generation unit which generates an ATS-side tracking error signal; an ATS control signal generation unit which generates an ATS control signal to cancel out a tracking error; and a signal providing unit which provides the ATS control signal to a tracking servo loop.

Optical recording composition and holographic recording medium

The present invention provides an optical recording composition comprising at least one compound denoted by general formula (I) and a holographic recording medium comprising a recording layer, wherein the recording layer comprises at least one compound denoted by general formula (I). In general formula (I), each of A 1 and A 2 independently denotes —CR 4 R 5 —, —O—, —NR 6 —, —S—, or —C(═O)—, each of R 4 , R 5 , and R 6 independently denotes a hydrogen atom or a substituent, R 1 denotes a substituent, n denotes an integer ranging from 0 to 4, each of R 2 and R 3 independently denotes a substituent having a Hammett substituent constant, σp value, of greater than 0, R 2 and R 3 do not form a ring structure by bonding together, and at least one from among R 1 , R 2 , R 3 , A 1 , and A 2 comprises at least one polymerizable group.

Recording and/or reproduction apparatus

A recording and/or reproduction apparatus, for an information medium including a substrate having concave and convex portions and a plurality of recording layers, includes a light source for emitting a light beam; an optical system for diffracting the light beam emitted by the light source so as to output a first diffracted light beam and a plurality of second diffracted light beams; and a driving section for driving the optical system. The optical system outputs the first diffracted light beam and the second diffracted light beams, such that when one of the second diffracted light beams is converged to and reflected by one of the concave and convex portions, the first diffracted light beam is converged to one of the recording layers. The driving section drives the optical system, such that the one of the second diffracted light beams is converged to the one of the concave and convex portions.

Hologram recording medium

Provided is a hologram recording medium of precisely performing a location determination control of a beam spot by using a simple structure and performing a shift multi-recording while performing a two-dimensional location determination control in a tangential direction and a radial direction of the recording medium. The provided hologram recording medium has a recording/reproducing layer and a reflection layer between two substrates, and continuous or intermittent convex units or concave units for performing an optical location determination control are installed on a substrate adjacent to the reflection layer, the substrate having a flat surface facing the reflection layer. Accordingly, the provided hologram recording medium precisely performs a location determination control of a beam spot for recording data and performs a shift multi-recording while performing a two dimensional location determination control in a tangential direction and a radial direction of the recording medium.

Method for recording and reproducing holographic data and holographic recording medium

Method and device for positioning hologram in disc type holographic storage medium and disc type holographic storage medium

本发明公开了一种盘式全息存储介质中全息图的定位方法和装置及盘式存储介质，实现交叉移位复用时的光束位置定位标记方法，属于光全息存储技术领域。所述方法在盘式存储介质上预先刻画导槽，并在导槽上刻绘定位标记，标记中包好了索引信息、位置信息和交叉角度信息。定位激光束和记录/再现激光束的位置作用于相同的介质位置，当光头高速访问记录/读取位置时，以标记位置开始执行移位复用记录/读取，通过伺服系统控制激光光束沿导槽移动，并保证聚焦光束聚焦于介质。利用本发明提供的方法和装置可以在实行交叉移位复用记录/读取的过程中，对位置、角度信息进行快速定位，提高系统的记录/读取速度，实现随机存取。

Holographic data storage medium and apparatus and method for recording/reproducing holographic data to/from the same

A holographic data storage medium and an apparatus and method for recording/reproducing holographic data using the same. The holographic data storage medium includes a substrate; a holographic recording layer disposed on the substrate; and a cover layer covering the holographic recording layer. The holographic recording layer includes a data recording region including a plurality of data layers to which data is recorded, the data recording region in which interference fringes due to first and second beams are formed in different data layers in a depthwise direction; and a layer discrimination region for providing discrimination between the data layers.

Processing data pixels in a holographic data storage system

A method for processing data pixels in a holographic data storage system is disclosed. The method includes assigning predetermined reserved blocks throughout each data page, where each reserved block comprises known pixel patterns, determining position errors of the data page by computing the best match between regions of the data page and the predetermined reserved blocks, and compensating the data pixels at the detector in accordance with the corresponding position errors of the data page.

Optical information recording / reproducing apparatus and optical information reproducing apparatus

Optical recording composition and holographic recording medium

The present invention provides an optical recording composition comprising a compound denoted by general formula (I) and a holographic recording medium comprising a recording layer, wherein the recording layer comprises a cyclic allyl sulfide compound denoted by general formula (I). In general formula (I), R 1 denotes a hydrogen atom or an alkyl group, and Z 1 denotes an atom group, the atom group forming a ring structure with a sulfur atom and a carbon atom which are adjacent to the atom group, and a carbon atom bonded to the sulfur atom.

Apparatus and method for recording and reproducing optical information

Optical information is stored in an optical information recording medium having an information recording layer utilizing holography with an optical information recording apparatus which includes security features. An input device is used to input individual information which is unique to an individual. An information light carries information to be recorded on the optical information recording medium. A phase modulation pattern is generated based on the individual information. A recording reference light is generated including a phase modulator for spatially modulating a phase of the reference light, for generating reference light for recording having a phase spatially modulated based on the phase modulation pattern information. A recording optical system illuminates the information recording layer on the same side with both the information light and the reference light.

Devices for recording or reading a coded hologram

Vorrichtung zum Aufzeichnen eines kodierten Hologrammes mit einer Strahlungsquelle, mit der kohärente Ausgangsstrahlung erzeugbar ist, mit einem mit der Ausgangsstrahlung beaufschlagbaren Objekt, das in einem Hologramm eine zu kodierende Datenstruktur aufweist, mit einem mit der Ausgangsstrahlung der Strahlungsquelle beaufschlagbaren Modulator, mit dem der den Modulator beaufschlagenden Ausgangsstrahlung ein Modulationsmuster aufprägbar ist, und mit einem Hologrammträger, dem unter Überlagerung von von der Datenstruktur modulierter Ausgangsstrahlung und von dem Modulationsmuster modulierter Ausgangsstrahlung ein der Datenstruktur zugeordnetes Datenhologramm einschreibbar ist, wobei Mittel zum relativen Versetzen des Modulationsmusters und des Hologrammträgers vorhanden sind, dadurch gekennzeichnet, dass der Hologrammträger (12) ein Positionierhologramm (37) aufweist, das einer gegenüber der Datenstruktur (41) strukturell einfachen Positionierstruktur (44) entspricht, und dass das Positionierhologramm (37) in einem Abstand von dem Datenhologramm (36) angeordnet ist. contraption for recording a coded hologram with a radiation source, with the coherent Output radiation can be generated, with one with the output radiation actable object that in a hologram one to be coded Data structure, with a with the output radiation of the Radiation source acted on modulator, with which the modulator impinging output radiation a modulation pattern can be imposed, and with a hologram carrier, under overlay of output data modulated by the data structure and of the modulation pattern modulated output radiation of the data structure assigned data hologram is written, wherein means for relative displacement of the modulation pattern and the hologram carrier present are characterized in that the hologram carrier (12) a positioning hologram (37) facing one of Data structure (41) structurally simple positioning structure (44) corresponds, and that the positioning hologram (37) at a distance ...

Optical recording medium and process for producing the same

An optical recording medium comprising at least an underside substrate with servo pit pattern; a recording layer for recording of information with the use of holography, superimposed on the underside substrate; and an upside substrate superimposed on the recording layer, wherein a transparent resin layer is interposed between the upside substrate and the recording layer. For example, in a preferred mode, the transparent resin layer contains either a thermosetting resin or an ultraviolet slow-acting hardening resin.

Optical recording medium and its use

本发明提供了一种光记录介质，包括：全息记录层，通过全息技术在该全息记录层上记录信息；固定到全息记录层的至少一个主表面的遮光组件；用于控制遮光组件的透光状态的控制电极，其中，遮光组件具有通过在记录单元区域基础上划分遮光组件而获得的多个像素，并且透光状态可被逐个像素地控制。

Data protection system

The present invention provides systems and methods for logically organizing data for storage and recovery on a data storage medium using a multi-level format. The present invention also provides systems and methods for protecting data stored on data storage medium so that the data may be recovered without errors.

Method and apparatus for the holographic recording and readout of data

本发明涉及用于在媒体上分布数据标记的方法。数据源(44)的图像被记录在光学媒体(2)上。借助于检测图像上的标识标记来读出数据。要记录的数据用禁止具有相同状态的数据的紧密相连超过预定次数的编码方法来编码。在数据源的矩阵中，定义具有预定大小和位置的阵列，所述阵列包含标识数据标记和用户数据标记。还公开了具有二维数据源(44)和用于把数据源通过物体光束(35)和参考光束(36)在光学媒体(2)上成像的光学系统的装置。所述光学媒体位于与数据源(44)的图像相关的傅里叶平面内。除全息图的傅里叶平面之外，所述光学系统还包括在数据源(44)和全息图(9)之间的另一个傅里叶平面(51)，并且在另一傅里叶平面中设有空间滤波装置。

Optical information recording medium

An optical information recording medium includes: a recording area on which an interfering beam formed where a first beam and a second beam whose converging angle is smaller than that of the first beam overlap each other is recorded as a hologram, the first and second beams being emitted from the same light source with the first beam directed to one surface and the second beam directed to the other surface; a first base area that covers the recording area's one surface to which the first beam is emitted, and allows the first beam to pass therethrough; and a second base area that is made thicker than the first base area, covers the recording area's other surface to which the second beam is emitted, and allows the second beam to pass therethrough.

Hologram recording device and method, computer program and hologram recording medium

A hologram recording device (300) records recording information in a hologram recording medium (1) wherein a hologram recording layer (11) to have the recording information recorded therein and a position information recording layer (13) are stacked. The hologram recording device is provided with a first recoding means (101) for recording the recording information in the hologram recording layer, and a second recording means (121) for converting an area of the position information recording layer corresponding to the area of the hologram recording layer where the recording information has been recorded, into a recorded state.

Optical recording media and recording/reproducing methods and apparatuses for the same

An optical recording medium in which interference patterns formed from interference between signal light and reference light are recorded as data and a recording/reproducing method and apparatus for the optical recording medium. The optical recording medium including at least a recording layer in which predetermined data is recorded, wherein a thickness of a portion of the recording layer is larger than a thickness of another portion of the recording layer, wherein data is recorded in the thicker region, and the additional information of a recording condition and/or a reproducing condition is recorded in the thinner region.

Method and apparatus foe recording and reproducing optical information (variants)

1. An optical information recording apparatus for recording information in an optical information recording medium having an information recording layer in which information is recorded utilizing holography, the apparatus comprising: information light generation means for generating information light carrying information; recording reference light generation means including phase modulation means for spatially modulating the phase of light, for generating reference light for recording having a phase spatially modulated by the phase modulation means; and a recording optical system for illuminating the information recording layer on the same side thereof with the information light generated by the information light generation means and the reference light for recording generated by the recording reference light generation means such that the information is recorded in the information recording layer in the form of an interference pattern as a result of interference between the information light and the reference light for recording, wherein the optical information recording medium has a positioning region for recording information for positioning the information light and the reference light for recording, the apparatus further comprising position control means for controlling the positions of the information light and the reference light for recording relative to the optical information recording medium using the information recorded in the positioning region. 2. An optical information recording apparatus according to claim 1, wherein the recording optical system projects the information light and the reference light for recording such that the optical axis of the information light and the optical axis of the reference light for recording are located on the same line. 3. An optical information recording method for recording information in an optical information recording medium having an information recording layer in which information is recorded utilizing ...

Method and storage medium for calibrating a holographic storage system

Method for calibrating a holographic storage system The present invention relates to a method for calibrating a holographic storage system, and to an apparatus for reading from and/or writing to holographic storage media and a holographic storage medium suitable for such method. According to the invention, the method has the steps of: sending a set of test data pages through at least part of the holographic storage system; receiving a set of transmitted test data pages with a detector; comparing the set of transmitted test data pages with the set of sent test data pages; and correcting parameter variations of the holographic storage system based on the results of the comparing step.

Optical recording device and optical recording method

An optical recording device includes a light source, a light-converging optical system, a moving unit, detection unit, and an acquisition unit. In the optical recording device, interference fringes from a recording light are shift multi-recorded as a plurality of pages of holograms within each of a plurality of planes corresponding to a plurality of convergence positions based on light exposure amount of each page, acquired by the acquisition unit, for each of the convergence positions.

Holographic recording medium and pickup for this medium

The present invention relates to a holographic recording medium (9) adapted to store additional information for the recorded holograms, and to a holographic pickup (1) for a holographic storage system for use with the holographic recording medium (9) . According to the invention, the holographic recording medium (9) has a holographic layer (94) for storing holograms and a servo layer (92) for positioning a light beam for reading and/or recording of a hologram relative to the holographic recording medium, wherein the servo layer (92) is recordable or rewritable. A holographic pickup (1) for use with such a holographic recording medium (9) includes a light source (13) for recording additional data in the servo layer (92) of the holographic recording medium (9) .

System and method for recording and reproducing holographic interferogram with optical servo

A system and method for recording and reproducing holographic interferogram with servos. A servo process is provided by the system and method to continuously record a holographic interferogram in a holographic recording medium with servo trace layers. Also, by the servo process, the intensity distribution of a reference beam is monitored, which is reflected by a reflecting mirror disposed on the other side of the holographic recording medium. By analyzing the distribution, one can adjust the distance and the incidence angle between the reflection mirror and the reference beam. Moreover, a plurality of servo tracks on different layers are provided for recording the holographic interferogram on different layers of holographic recording medium.

Volume holographic data recording media

Apparatus for recording/reproducing holographic data and method of adjusting position of recording layer

An apparatus for recording/reproducing holographic data and a method of adjusting a position of a recording layer. While an objective lens focusing first and second lights having different wavelengths on a holographic data storage medium including first and second reflective layers reciprocatingly moves in a direction of an optical axis, a focus movement unit, which moves a focus of the second light in the direction of the optical axis until a time difference between a first detection signal generated when the first light is reflected from the first reflective layer and a second detection signal generated when the second light is reflected from the second reflective layer becomes a value corresponding to a position of a desired recording layer, is controlled to move a focal position of the second light so that the focal position of the second light can be adjusted to the position of a desired recording layer.

Optical information reproducing device

Provided are an optical information reproducing device, which takes advantage of holography and can precisely detect a well-known pattern disposed at a prescribed location within a page and used for correcting position deviation, rotation deviation, and magnification deviation, and the method thereof. The optical fiber reproducing device that takes advantage of holography to reproduce information from an optical information recording medium is characterized by comprising a detection unit that detects the position information of a marker as a well-known pattern from a page as a 2-dimensional reproduction signal from a hologram, a detection error position estimating unit that estimates presence/absence of detection error in the position information of the marker detected by the detection unit and estimates the position where the detection error occurs if there is detection error, a position correcting unit that corrects the marker position information of the detection error position specified by the detection error position estimating unit, and a signal detection unit that detects each signal from within the page based on the marker position information corrected by the position correcting unit.

Volume holographic data recording media

There is provided volume holographic data recording media having a recording layer which is capable of recording interference fringes generated by interference of light having excellent coherence as fringes having different refractive indexes and undergoes holographic data recording by an amount of spatial shift distance of not more than 3 μm which is smaller than that of conventional media.

Information record media, its record method, its regeneration method and regenerator

本发明是更小地构筑卡拉OK系统整体的发明。在CD尺寸的盘上，数字记录着作为主图象(604)的卡拉OK场景动态图象信息，在多个音流中数字记录着不相同的多个卡拉OK演奏信息，在多个副图象通道(602)中数字记录着对应于各卡拉OK演奏信息的歌词及标题信息。

Two-dimensional coding method

A two-dimensional coding method includes: using a two-dimensional image containing plural reference pixels each having a different brightness and data pixels representing data in accordance with brightness; and coding a binary sequence of plural bits to be recorded as a hologram by matching the brightness level of the data pixel based on the brightnesses of the plural reference pixels.

Volume holographic data recording media

There is provided volume holographic data recording media having a recording layer which is capable of recording interference fringes generated by interference of light having excellent coherence as fringes having different refractive indexes and undergoes holographic data recording by an amount of spatial shift distance of not more than 3 μm which is smaller than that of conventional media.

Optical information recording medium, optical information recording apparatus, and optical information recording method

Method and apparatus for the holographic recording and readout of data

本发明涉及用于在媒体上分布数据标记的方法。数据源(44)的图像被记录在光学媒体(2)上。借助于检测图像上的标识标记来读出数据。要记录的数据用禁止具有相同状态的数据的紧密相连超过预定次数的编码方法来编码。在数据源的矩阵中，定义具有预定大小和位置的阵列，所述阵列包含标识数据标记和用户数据标记。还公开了具有二维数据源(44)和用于把数据源通过物体光束(35)和参考光束(36)在光学媒体(2)上成像的光学系统的装置。所述光学媒体位于与数据源(44)的图像相关的傅里叶平面内。除全息图的傅里叶平面之外，所述光学系统还包括在数据源(44)和全息图(9)之间的另一个傅里叶平面(51)，并且在另一傅里叶平面中设有空间滤波装置。

Light irradiation device and control method

A light irradiation device includes: a focus servo control unit including a light source, a spatial light modulating unit, and a light irradiating unit, for focus servo control so that the ideal focal position of light via an objective lens is such that distance between an ideal focal position and a hologram recording medium surface is smaller than distance from the surface to the lower layer side face of the recording layer, and the focal position of light via the objective lens is constant at the ideal focal position; an objective-lens/relay-lens distance adjusting unit to adjust distance between the objective lens and a relay lens close to the objective lens; a light reception unit to receive marker light; and a constant distance control unit to control the objective-lens/relay-lens distance adjusting unit based on error between the ideal position of the marker light, and the actual position of the marker light.