Optical disk

An optical disk of a land-and-groove recording system capable of reducing a track pitch while suppressing the drop of an S/N ratio of reproduction signals is provided. The optical disk includes guide groove portions and space portions between the groove portions and is loaded to an optical disk recording/reproduction apparatus having a mechanism for removing or reducing leakage signals from adjacent tracks by using three or more light beam spots and signals are recorded to the groove portions and the space portions between the groove portions, wherein a wavelength λ of reproduction light irradiated from the optical disk recording/reproduction apparatus and a refractive index n of a cover layer on an incidence side of reproduction light or a substrate are from λ/12n to λ/6n.

Imaging sensor and imaging device

An imaging sensor includes a color filter, and DBPF that has a transmission characteristic in a visible-light band, a blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and a transmission characteristic in a second wavelength band that is a part of the first wavelength band. A transmission characteristic of DBPF and a transmission characteristic of each filter part of the color filter are set in such a manner that the second wavelength band of DBPF is included in a third wavelength band that is a wavelength band in which transmittance of the filter parts in colors is approximate to each other on a long-wavelength side of the visible-light band and a fourth wavelength band that is a wavelength band in which a filter part for infrared light has a transmission characteristic.

Information-recording medium

An information-recording medium includes first and second recording layers each of which is formed of a phase-change material containing Bi, Ge, and Te, wherein the first recording layer is arranged nearer to a light-incident side of the laser beam than the second recording layer; a composition of Bi, Ge, and Te contained in the second recording layer is within a composition range surrounded by composition points B2, C2, D2, D6, C6, and B6 on a triangular composition diagram of Bi, Ge, and Te; and a difference (α−δ) between a composition α of Bi in the first recording layer and a composition δ of Bi in the second recording layer is −1.0 to 3.0 at. %. Thus, there is provided a two-layered information-recording medium with high recording-data reliability and excellent repeated-data recording durability.

Recording and reproducing apparatus having a magneto-optical head with an objective lens and laser-beam-permeable member

A compact recording and reproducing apparatus includes a floating-type head movable in a fan shape in parallel with the surface of a disk recording medium in order to make faster access to the tracks and to record information at a higher density. A slider and a head are secured to the tip of a swing arm capable of fan-shaped swing movement, and a solid immersion lens is used for the head, so that the light beam can be passed along the arm from the fulcrum at the rotating pivot of the swing arm member.

Optical recording medium and method of manufacturing the same

An optical recording medium includes a plane ring-shaped substrate in which a center hole is opened at the center thereof, a recording-retrieving function layer and a cover layer each having an outer diameter approximately equal to that of the substrate and an inner diameter larger than an outer diameter of the center hole, are stacked on the substrate, and as a separate entity from the cover layer, a clamp portion which is for holding and fixing the substrate and which has an outer diameter smaller than inner diameters of the recording-retrieving function layer and the cover layer, is provided around the center hole in a region where the cover layer is not formed.

Imaging processing device and imaging processing method

An imaging processing device and an imaging processing method that can solve a problem generated in visible light photographing in a case where DBPF is used instead of an infrared cut filter. An imaging sensor includes a color filter, and DBPH that has a transmission characteristic in a visible-light band, blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and transmission characteristic in a second wavelength band that is a part of the first wavelength band. A signal processing unit subtracts an infrared signal, which is output from an infrared pixel, from each color signal output from a pixel in each color of visible light in the imaging sensor. Here, in a case where each color signal reaches a pixel saturation level, control of performing correction in such a manner that an infrared signal subtracted from each color signal is lowered is performed.

Magnetooptic recording medium and reproducing method therefor

A magneto-optical recording medium comprises a recording layer 5, an intermediate layer 4, and a reproducing layer 3. The reproducing layer 3 is formed of a rare earth transition metal alloy in which rare earth metal is dominant, and each of the intermediate layer 4 and the recording layer 5 is formed of a rare earth transition metal alloy in which transition metal is dominant. The intermediate layer 4 exhibits in-plane magnetization at a temperature of not less than 140° C. Therefore, the intermediate layer 4 cuts off the exchange coupling force between the recording layer 5 and the reproducing layer 3 during the reproduction. A magnetic domain 3A, which is transferred to the reproducing layer 3, is expanded to a size of a minimum magnetic domain diameter by the magnetostatic repulsive force exerted between the magnetic domain in the intermediate layer 4 and the magnetic domain in the reproducing layer. It is possible to obtain a reproduced signal having an amplified intensity without ...

Optical disk recording and reproducing method and optical disk

An optical disk recording and reproducing method. In a system for reproducing unique information which specifies a medium vendor and prohibits use by a third party in a control information area of an optical disk, this method reproduces the control information during a start-up period for recording or reproduction after the optical disk is loaded into a drive unit and displays the unique information on a display unit which is connected to the drive unit.

Disk cartridge

There is provided a disk cartridge adaptable to an enlarged head by exposing an information recording disk extensively out of a cartridge case. In the disk cartridge, a cartridge case is divided on its plane into at least a first case portion and a second case portion, and the second case portion is arranged to be slidable relative to the first case portion. When the disk cartridge is not in use, the information recording disk is enabled to be covered by the first case portion and the second case portion by keeping the first case portion and the second case portion in a parallel state, and a disk freeing portion is so formed that, when the disk cartridge is in use, exposes parts of both inside face and outside face of the information recording disk are exposed from the cartridge case by moving the second case portion relative to the first case portion and overlapping the first case portion and the second case portion.

Imaging apparatus and imaging system

Provided is an imaging system capable of stereo-photographing with both of visible and infrared images, and improving color reproducibility in visible-light-photographing. The imaging system includes two imaging sensors, and two DBPFs that have transmittance characteristics in a visible light band and a second wavelength band, are respectively provided correspondingly to the two imaging sensors, and serve as optical filters. The imaging system has: at least four kinds of filters, which have mutual different spectral transmission characteristics corresponding to wavelengths in the visible light band and whose transmissions in a second wavelength band approximate each other; and two color filters provided so as respectively correspond to the two imaging sensors. The imaging system measures a distance to a target based on two visible or infrared image signals.

Optical recording medium, optical head and optical recording device

A magneto-optical recording medium comprises, on a substrate, a reflective layer, a first dielectric layer, a recording layer, and a second dielectric layer successively in this order, for being irradiated with a recording or reproducing light beam coming from a side of the second dielectric layer. A diamond-like carbon layer as a self-lubricating layer is formed on the second dielectric layer. An optical head comprises a floating type slider installed with a solid immersion lens. A protective film having a self-lubricating property may be also formed on a bottom surface of the slider opposing to the optical recording medium. Even when the floating position of the optical head is varied, and the optical head contacts with the surface of the optical recording medium, then the sliding scratch scarcely occurs, because the optical head smoothly glides on the recording medium surface. A lubricating layer may be further formed on the self-lubricating layer.

Recording and reproducing apparatus of thin optical disc

In an apparatus for recording and reproducing a thin optical disc by using the same optical system as that of a CD, a DVD or the like, the invention provides a technique which can stably rotate the thin optical disc at a high speed. The structure can be made such that a turbulence of an airflow is not generated even if the thin optical disc on a turn table is rotated at a high speed, by employing a transparent turn table and arranging a recording and reproducing head or the like in an opposite side to a thin optical disc mounting surface of the turn table.

Recording disk and producing method therefor

A recording disk comprises a substrate including a plastic material, and an overlay arranged over the substrate and including a recording substance for recording therein an information, and a radially-outer periphery of the overlay is received within a radially-outer periphery of the substrate as seen in an axial direction of the recording disk.

Optical recording medium

An optical recording medium having two information sections (L0 and L1 layers) is provided by holding relationships: R1≧R3+r R2≦R4−r wherein R1, R2, R3, and R4 represent distances from the center of the medium at radial positions: R of an innermost circumferential track of a test area disposed on an inner circumferential side of the L1 layer; R of an outermost circumferential track of a test area disposed on an outer circumferential side of the L1 layer; R of an innermost circumferential guide groove of an information-recording area of the L0 layer; and R of an outermost circumferential guide groove of the information-recording area of the L0 layer respectively, and r represents a radius of a light beam on the L0 layer when the light beam is collected on the L1 layer.

Optical recording medium

An optical recording medium includes a plane ring-shaped substrate in which a center hole is opened at the center thereof, a recording-retrieving function layer and a cover layer each having an outer diameter approximately equal to that of the substrate and an inner diameter larger than an outer diameter of the center hole, are stacked on the substrate, and as a separate entity from the cover layer, a clamp portion which is for holding and fixing the substrate and which has an outer diameter smaller than inner diameters of the recording-retrieving function layer and the cover layer, is provided around the center hole in a region where the cover layer is not formed.

Imaging apparatus and imaging system

Provided is an imaging system capable of stereo-photographing with both of visible and infrared images, and improving color reproducibility in visible-light-photographing. The imaging system includes two imaging sensors 1, and two DBPFs 5 that have transmittance characteristics in a visible light band and a second wavelength band, are respectively provided correspondingly to the two imaging sensors, and serve as optical filters. The imaging system has: at least four kinds of filters, which have mutual different spectral transmission characteristics corresponding to wavelengths in the visible light band and whose transmissions in a second wavelength band approximate each other; and two color filters provided so as respectively correspond to the two imaging sensors. The imaging system measures a distance to a target based on two visible or infrared image signals.

Magneto-optical head having heat sink layer

A magneto-optical recording head comprises a magnetic coil formed on a lower surface of a transparent substrate opposed to a magneto-optical disk. A heat sink layer is provided at the outside of the magnetic coil on the lower surface. An objective lens is supported on an upper surface of the transparent substrate. The heat, which is generated by the magnetic coil, is released via the heat sink layer to the space between the magneto-optical disk and the substrate. The release of the heat is facilitated by the air stream which is generated by the rotation of the magneto-optical disk. The heat can be effectively released from the magnetic coil without inhibiting optical characteristics of the objective lens.

Magneto-optical head having heat sink layer

A magneto-optical recording head comprises a magnetic coil formed on a lower surface of a transparent substrate opposed to a magneto-optical disk. A heat sink layer is provided at the outside of the magnetic coil on the lower surface. An objective lens is supported on an upper surface of the transparent substrate. The heat, which is generated by the magnetic coil, is released via the heat sink layer to the space between the magneto-optical disk and the substrate. The release of the heat is facilitated by the air stream which is generated by the rotation of the magneto-optical disk. The heat can be effectively released from the magnetic coil without inhibiting optical characteristics of the objective lens.

Substrate for information recording disk, mold and stamper for injection molding substrate, and method for making stamper, and information recording disk

A cavity surface-forming plate of a mold for injection-molding a plastic substrate is coarsely polished, and then a surface for defining a cavity is applied with electroless Ni-P plating. The surface of the plating is polished with abrasive grains to obtain surface roughness of Ra<=2.0 nm and Rmax<=22 nm. The plastic substrate molded with the mold has smoothness equivalent to the polished plating surface. A concave-convex pattern for forming pits may be formed on the cavity surface. A magnetic disk or an optical disk provided with the substrate makes it possible to realize the near contact system for a magnetic or magneto-optical head. Thus, it is possible to realize high density recording.

Information recording medium and error detecting method

An information recording medium has such error detecting codes that the distance between the codes of adjacent tracks of the medium is always 1. The bits E1-Em of the detecting codes, which are included by pre-format information, are generated as data trains of parity check bits constructed by dividing the bits S1-Sm of the sector numbers and the bits T1-T2 of the track numbers. If the generated detecting codes are compared between adjacent, tracks, the distance between the codes is always 1. Consequently, when the detecting codes of a desired track are read out, substantially no cross talk occurs from the detecting codes of the adjacent tracks. Therefore, even if the recording medium has a narrow track pitch, it is possible to reliably and accurately detect the errors of address data of the medium.

Optical recording medium, optical head, and optical recording device

A magneto-optical recording medium comprises, on a substrate, a reflective layer, a first dielectric layer, a recording layer, and a second dielectric layer successively in this order, for being irradiated with a recording or reproducing light beam coming from a side of the second dielectric layer. A diamond-like carbon layer as a self-lubricating layer is formed on the second dielectric layer. An optical head comprises a floating type slider installed with a solid immersion lens. A protective film having a self-lubricating property may be also formed on a bottom surface of the slider opposing to the optical recording medium. Even when the floating position of the optical head is varied, and the optical head contacts with the surface of the optical recording medium, then the sliding scratch scarcely occurs, because the optical head smoothly glides on the recording medium surface. A lubricating layer may be further formed on the self-lubricating layer.

Magneto-optical recording medium capable of recording multiple value signals

On a surface of a transparent substrate 1 having a preformat pattern 2 formed thereon are laminated a first recording layer 4 in which a recording state exists in one different magnetic field region of an applied external magnetic field and a second recording layer 6 in which two recording states exist in magnetic field regions different from that for the first recording layer. As required, dielectric layers 3, 5 and 7 , a reflecting layer 8 and a protection layer 9 can be laminated. The 4-valued recording of information becomes possible by assigning information signals “1”, “0”, “3”, and “2” to H 0 , H 1 , H 2 and H 3 , respectively.

Imaging sensor and imaging device

An imaging sensor includes a color filter, and DBPF that has a transmission characteristic in a visible-light band, a blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and a transmission characteristic in a second wavelength band that is a part of the first wavelength band. A transmission characteristic of DBPF and a transmission characteristic of each filter part of the color filter are set in such a manner that the second wavelength band of DBPF is included in a third wavelength band that is a wavelength band in which transmittance of the filter parts in colors is approximate to each other on a long-wavelength side of the visible-light band and a fourth wavelength band that is a wavelength band in which a filter part for infrared light has a transmission characteristic.

Recording and reproducing apparatus of thin optical disc

In an apparatus for recording and reproducing a thin optical disc by using the same optical system as that of a CD, a DVD or the like, the invention provides a technique which can stably rotate the thin optical disc at a high speed. The structure can be made such that a turbulence of an airflow is not generated even if the thin optical disc on a turn table is rotated at a high speed, by employing a transparent turn table and arranging a recording and reproducing head or the like in an opposite side to a thin optical disc mounting surface of the turn table.

Disk cartridge

There is provided a disk cartridge adaptable to an enlarged head by exposing an information recording disk extensively out of a cartridge case. In the disk cartridge, a cartridge case is divided on its plane into at least a first case portion and a second case portion, and the second case portion is arranged to be slidable relative to the first case portion. When the disk cartridge is not in use, the information recording disk is enabled to be covered by the first case portion and the second case portion by keeping the first case portion and the second case portion in a parallel state, and a disk freeing portion is so formed that, when the disk cartridge is in use, exposes parts of both inside face and outside face of the information recording disk are exposed from the cartridge case by moving the second case portion relative to the first case portion and overlapping the first case portion and the second case portion.

Imaging processing device and imaging processing method

An imaging processing device and an imaging processing method that can solve a problem generated in visible light photographing in a case where DBPF is used instead of an infrared cut filter. An imaging sensor includes a color filter, and DBPH that has a transmission characteristic in a visible-light band, blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and transmission characteristic in a second wavelength band that is a part of the first wavelength band. A signal processing unit subtracts an infrared signal, which is output from an infrared pixel, from each color signal output from a pixel in each color of visible light in the imaging sensor. Here, in a case where each color signal reaches a pixel saturation level, control of performing correction in such a manner that an infrared signal subtracted from each color signal is lowered is performed.

Magneto-optical head and magneto-optical recording apparatus including same

A magneto-optical recording head comprises a magnetic coil formed on a lower surface of a transparent substrate opposed to a magneto-optical disk. A heat sink layer is provided at the outside of the magnetic coil on the lower surface. An objective lens is supported on an upper surface of the transparent substrate. The heat, which is generated by the magnetic coil, is released via the heat sink layer to the space between the magneto-optical disk and the substrate. The release of the heat is facilitated by the air stream which is generated by the rotation of the magneto-optical disk. The heat can be effectively released from the magnetic coil without inhibiting optical characteristics of the objective lens.

Imaging apparatus and imaging system

Provided is an imaging system capable of stereo-photographing with both of visible and infrared images, and improving color reproducibility in visible-light-photographing. The imaging system includes two imaging sensors, and two DBPFs that have transmittance characteristics in a visible light band and a second wavelength band, are respectively provided correspondingly to the two imaging sensors, and serve as optical filters. The imaging system has: at least four kinds of filters, which have mutual different spectral transmission characteristics corresponding to wavelengths in the visible light band and whose transmissions in a second wavelength band approximate each other; and two color filters provided so as respectively correspond to the two imaging sensors. The imaging system measures a distance to a target based on two visible or infrared image signals.

IMAGING PROCESSING DEVICE AND IMAGING PROCESSING METHOD

An imaging processing device and an imaging processing method that can solve a problem generated in visible light photographing in a case where DBPF is used instead of an infrared cut filter. An imaging sensor includes a color filter, and DBPH that has a transmission characteristic in a visible-light band, blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and transmission characteristic in a second wavelength band that is a part of the first wavelength band. A signal processing unit subtracts an infrared signal, which is output from an infrared pixel, from each color signal output from a pixel in each color of visible light in the imaging sensor. Here, in a case where each color signal reaches a pixel saturation level, control of performing correction in such a manner that an infrared signal subtracted from each color signal is lowered is performed. 1. An imaging processing device comprising:an imaging sensor in which a light-receiving element is arranged in each pixel;a filter transmitting both of at least a part of visible light and at least a part of infrared light, in which a plurality of kinds of filter regions is arranged in a predetermined array in a manner corresponding to an arrangement of the pixel of the imaging sensor and has different transmission characteristics corresponding to wavelengths in a visible-light band, each kind of the filter regions having an infrared-light transmission wavelength band to transmit light on a long-wavelength side of the visible-light band and a light-blocking wavelength band to block light between the visible-light band and the infrared-light transmission wavelength band in a manner substantially similar to each other;an optical system including a lens that forms an image on the imaging sensor; anda signal processing device that is capable of processing a signal output from the imaging sensor and that is capable of outputting a visible image signal and an ...

IMAGING SENSOR AND IMAGING DEVICE

An imaging sensor includes a color filter, and DBPF that has a transmission characteristic in a visible-light band, a blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and a transmission characteristic in a second wavelength band that is a part of the first wavelength band. A transmission characteristic of DBPF and a transmission characteristic of each filter part of the color filter are set in such a manner that the second wavelength band of DBPF is included in a third wavelength band that is a wavelength band in which transmittance of the filter parts in colors is approximate to each other on a long-wavelength side of the visible-light band and a fourth wavelength band that is a wavelength band in which a filter part for infrared light has a transmission characteristic. 1. An imaging sensor comprising:an imaging sensor main body in which a light-receiving element is arranged in each pixel; anda filter provided on the imaging sensor main body,wherein on the filter, a plurality of kinds of filter regions with different spectral transmission characteristics is arranged in a predetermined array in a manner corresponding to an arrangement of the pixel of the imaging sensor main body,the plurality of kinds of filter regions has different spectral transmission characteristics each of which corresponds to a wavelength in a visible-light band, andeach of the plurality of kinds of filter regions has an infrared-light transmission wavelength band, which passes light, on a long-wavelength side of the visible-light band and has a light-blocking wavelength band, which blocks light, between the visible-light band and the infrared-light transmission wavelength band in a mutually similar manner.2. The imaging sensor according to claim 1 , wherein the filter includesan optical filter that transmits light in the visible-light band having a first wavelength band that blocks light in a manner adjacent to the long- ...

IMAGING SENSOR AND IMAGING DEVICE

An imaging sensor includes a color filter, and DBPF that has a transmission characteristic in a visible-light band, a blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and a transmission characteristic in a second wavelength band that is a part of the first wavelength band. A transmission characteristic of DBPF and a transmission characteristic of each filter part of the color filter are set in such a manner that the second wavelength band of DBPF is included in a third wavelength band that is a wavelength band in which transmittance of the filter parts in colors is approximate to each other on a long-wavelength side of the visible-light band and a fourth wavelength band that is a wavelength band in which a filter part for infrared light has a transmission characteristic. 1. An imaging sensor comprising:an imaging sensor main body in which a light-receiving element is arranged in each pixel; and a color filter in which a plurality kinds of filter parts are arranged in a predetermined array in a manner corresponding to an array of pixels of the imaging sensor body, the plurality of kinds of filter parts having different spectral transmission characteristics in response to wavelengths in a visible-light band; and', i) a transmission characteristic in the visible-light band; and', 'ii) a light blocking characteristic in a first wavelength band adjacent to a longer wavelength side of the visible-light band, except for a second wavelength band for light transmission, the second wavelength band being a predetermined range having a lower limit and an upper limit within the first wavelength band; wherein:, 'an optical filter which has, 'the color filter has a third wavelength band, in which transmittances of the plurality of kinds of filter parts are approximate to one another, on a longer wavelength side than the visible-light band; and', 'the spectral transmission characteristics of the optical filter and the ...

IMAGING APPARATUS AND IMAGING SYSTEM

Provided is an imaging system capable of stereo-photographing with both of visible and infrared images, and improving color reproducibility in visible-light-photographing. The imaging system includes two imaging sensors , and two DBPFs that have transmittance characteristics in a visible light band and a second wavelength band, are respectively provided correspondingly to the two imaging sensors, and serve as optical filters. The imaging system has: at least four kinds of filters, which have mutual different spectral transmission characteristics corresponding to wavelengths in the visible light band and whose transmissions in a second wavelength band approximate each other; and two color filters provided so as respectively correspond to the two imaging sensors. The imaging system measures a distance to a target based on two visible or infrared image signals. 1. A imaging apparatus comprising:a imaging element;a filter configured to have at least a characteristic of transmitting a visible light wavelength range and an infrared light wavelength range, and filter a signal from the imaging element based on the characteristic;a signal processor configured to process the signal filtered by the filter to output a visible light signal and an infrared light signal;a moving-object region extractor configured to generate, from the infrared signal outputted from the signal processor, information on a moving object in an image photographed by the imaging element; anda signal output controller configured to add a second data to a first data or multiple the first data by the second data to transmit the added or multiplied first and second data outside, the first data being based on the visible light signal outputted from the signal processor, the second data being based on information on the moving object generated by the moving-object region extractor.2. The imaging apparatus according to claim 1 , further comprising:a face area detector configured to detect a person's face area ...

IMAGING PROCESSING DEVICE AND IMAGING PROCESSING METHOD

An imaging processing device and an imaging processing method that can solve a problem generated in visible light photographing in a case where DBPF is used instead of an infrared cut filter. An imaging sensor includes a color filter, and DBPH that has a transmission characteristic in a visible-light band, blocking characteristic in a first wavelength band adjacent to a long-wavelength side of the visible-light band, and transmission characteristic in a second wavelength band that is a part of the first wavelength band. A signal processing unit subtracts an infrared signal, which is output from an infrared pixel, from each color signal output from a pixel in each color of visible light in the imaging sensor. Here, in a case where each color signal reaches a pixel saturation level, control of performing correction in such a manner that an infrared signal subtracted from each color signal is lowered is performed. 1. An imaging processing device comprising:an imaging sensor in which a plurality light-receiving elements are arranged;a filter for transmitting at least a part of a visible light and at least a part of an infrared light, in which: i) a plurality of kinds of filter regions are arranged in a predetermined array corresponding to an arrangement of the plurality of light receiving elements of the imaging sensor and have different transmission characteristics corresponding to wavelengths in a visible-light band; ii) at least some of the plurality of kinds of filter regions each having an infrared-light transmission wavelength band to transmit a light on a longer wavelength side than the visible-light band, in a manner substantially similar to each other; and iii) a light-blocking wavelength band for blocking a light is provided between the visible-light band and the infrared-light transmission wavelength band;an optical system including a lens that forms an image on the imaging sensor; anda signal processing device comprising a processor which performs a signal ...

Magnetic recording medium

The present invention provides a magnetic recording medium with distinguished SNR and mechanical characteristics, which comprises an underlayer, a ferromagnetic thin film metallic layer and a protective film layer successively and continuously laminated on a non-magnetic resin substrate, where (A) at least one layer selected from the group consisting of an Si layer, an Si w N x C y O z layer and an Al w N x C y O z layer and (B) at least one layer selected from the group consisting of silicides, nitrides, oxides or their mixtures of Ti, Ta, Mo, V, Zr and their alloys are laminated on the non-magnetic resin substrate in the order of (A) and (B) or (i) a layer composed of at least one material selected from the group consisting of Ti, Ta, Mo, V, Zr, Nb and their alloys, (ii) at least one layer selected from the group consisting of an Si layer, an Si w N x C y O z layer and an Al w N x C y O z layer (where w+x+y+z=100 at. %, w≧30 at. %, 0 ≦z≦50 at. % and x+y≧20 at. %), and (iii) a layer composed of at least one material selected from the group consisting of Ti, Ta, Mo, V, Zr and their alloys are laminated on the non-magnetic resin substrate in the order of (i), (ii) and (iii), between the non-magnetic resin substrate and the underlayer.

Magneto-optical disk

(57)【要約】 【課題】 優れた耐摺動特性及び帯電防止機能を持つ表 面保護層を有する膜面入射型の光磁気ディスクを提供す る。 【解決手段】 光磁気ディスク100の表面保護層を透明 樹脂層、ハードコート層及び帯電防止コート層の3層と し、表面保護層の電気抵抗率が1.5×10 11 Ω/cm 2 以下か つ鉛筆硬度がF以上であり、表面保護層の膜厚が2.5μm 〜25μmとした。これにより、ディスク表面に帯電防止 効果を持たせることで集塵効果を抑制することが可能と なり、且つ、記録再生時、浮上ヘッドの摺動などに対す るディスク表面の耐久性を向上することができた。

Lens unit and camera module

【課題】サイズの大型化を招くことなく、融雪機能を備えたレンズユニットを提供する。【解決手段】レンズユニット１００は、円筒状の鏡筒１０と、鏡筒１０の内周側に、鏡筒１０の軸方向に沿って並べて配置された複数のレンズ１～４とを備え、鏡筒１０の最も物体側に配置されるレンズ１のフランジ部（平坦部）１ｂと、レンズ１に隣接するレンズ２のフランジ部（平坦部）２ｂと間に、通電により発熱するヒータ部４０が設けられている。【選択図】図１

Magnetooptical recording medium, and method and apparatus for recording/reproduction

Optical recording medium

Recording method for information recording medium, and information recorder

【課題】 レーザードライバーの高速化の限界を超えて高速記録を行なう場合に、信頼性の高い記録マークを形成する情報記録媒体の記録方法を提供すること。 【解決手段】 変調符合に従って情報記録媒体に記録マークを記録する記録方法であって、発光パルスの立ち上がり時間（Ｔｓ）及び立ち下がり時間（Ｔｅ）がそれぞれ２ｎｓｅｃ以下であるレーザードライバーを使用し、立ち上がり時間（Ｔｓ）及び立ち下がり時間（Ｔｅ）の合計（Ｔｓ＋Ｔｅ）と発光パルスの全照射時間（Ｔｍ）との比（Ｒ＝（Ｔｓ＋Ｔｅ）／Ｔｍ）が０．５以上となるような、謂わば、レーザードライバーの高速化の限界を超えた条件で高速記録マークを記録する場合、総ての記録符号長ｎＴの記録マークを１個のパルスにより記録し、パルスは、照射開始時の記録パワーが指数関数的に減衰する形状を有するように制御される。 【選択図】 図１１

レンズユニットおよびカメラモジュール

【課題】レンズを加熱することなく、物体側の面に付着した雪等の融雪を可能とするレンズユニットおよびカメラモジュールを提供する。【解決手段】レンズユニット１００は、円筒状に形成された鏡筒１０と、鏡筒の内側に、鏡筒の軸方向に沿って並べて配置された複数のレンズ１～５と、鏡筒の物体側の端部に形成された縮径部に配置されたシール部材３０と、シール部材３０の物体側に配置され、像側の面にヒータ部６０が形成されたカバーガラス５０と、カバーガラスの外周部を保持した状態で、鏡筒の物体側の端部に取り付けられる蓋部材４０とを備え、ヒータ部６０は、透明導電膜６１と、透明導電膜の上に形成された一対の電極部２６とを有している。【選択図】図２

情報記録ディスク

(57)【要約】 【課題】 射出成形基板を用いた情報記録ディスクにお いて出力変動の少なく、高密度記録が可能な磁気ディス クおよび光ディスクおよびそれらの製造方法を提供す る。 【解決手段】 浮上ヘッドを用いて記録再生する情報記 録ディスクに於いて、ディスク最外周を基準とし、最外 周から内周側に向かい0.1ｍｍ〜１ｍｍの範囲に樹脂保 護層を設ける。

光ディスク記録媒体及びその駆動装置

【課題】浮上型光ヘッドの光射出側面の異物の形成を防止できる光ディスク記録媒体及びその駆動装置を提供する。 【解決手段】光磁気ディスク４００は、記録再生領域２１０の内周側にクリーニング領域２０２を備える。クリーニング領域２０２は、浮上型光ヘッドの浮上量を低下させるような形状で形成される。浮上型光ヘッドをクリーニング領域に位置付けるとクリーニング領域上を浮上する浮上型光ヘッドの光射出側の面とクリーニング領域表面とが接触する。これにより、浮上型光ヘッドの光射出側の面の汚れが取り除かれ、長時間記録再生を行なっても浮上型光ヘッドの光射出側の面に異物等の形成を防止できる。よって、浮上型光ヘッドを用いて常に良好な記録再生を行なうことができる。 【選択図】 図４

情報記録ディスク及びディスク駆動装置

(57)【要約】 【課題】 トラックオフセットのないサンプルサーボ方 式の情報記録ディスクを提供する。また、当該ディスク に好適な記録再生装置を提供する。 【解決手段】 サーボピット列を構成する２個を１組と するプリピット１２，１３を、サーボ領域１５の中心を 介してその上流側及び下流側に等分に配列する。前記サ ーボピット列を構成する各プリピットは、これをサーボ 領域の両端部に分散して配列し、これら２個のプリピッ トの間に位相ピット列を配列することもできるし、これ をサーボ領域の中心部に隣接して配列し、その両側に位 相ピット列を構成する各位相ピットを分散して配列する こともできる。

Data recording medium

光磁気記録媒体

(57)【要約】 【課題】 外部磁界を用いて面内磁界を印加することな く、磁区拡大再生における再生特性を改善する。 【解決手段】 光磁気記録媒体は、情報が記録される記 録層５と、情報を読み出すための再生層３とを備え、記 録層５と再生層３の間に、室温では垂直磁化で、高温と なると面内磁化となる補助層４を備える。補助層４にお ける面内方向の磁化が、再生層３における磁区拡大を誘 発する。磁区拡大が誘発されると、記録層６からの漏洩 磁界と外部磁界を加えた磁界によって再生層３の磁区拡 大が進み、飽和振幅に近い再生信号振幅を得ることが可 能となる。

Imaging apparatus and imaging system

Provided is an imaging system capable of stereo-photographing with both of visible and infrared images, and improving color reproducibility in visible-light-photographing. The imaging system includes two imaging sensors, and two DBPFs that have transmittance characteristics in a visible light band and a second wavelength band, are respectively provided correspondingly to the two imaging sensors, and serve as optical filters. The imaging system has: at least four kinds of filters, which have mutual different spectral transmission characteristics corresponding to wavelengths in the visible light band and whose transmissions in a second wavelength band approximate each other; and two color filters provided so as respectively correspond to the two imaging sensors. The imaging system measures a distance to a target based on two visible or infrared image signals.

情報記録媒体

【課題】 書き換え耐久性に優れた相変化記録型の光情報記録媒体を提供する。 【解決手段】 基板上に設けられる相変化材料からなる記録層と、記録層の光が入射する側の面に接して設けられる第１界面層と、記録層の光が入射する側と反対側の面に接して設けられる第２界面層と、を備え、記録層は、Ｂｉ、Ｇｅ、Ｔｅを頂点とする三角組成図上の座標により示される下記４点（Ａ１、Ａ２、Ｂ１、Ｂ２）に囲まれた範囲内の組成比を有する相変化材料からなり、第１界面層と第２界面層の少なくとも１層は、Ｚｒ、Ｃｒ、Ｏを含有する情報記録媒体が提供される。 Ａ１（Ｂｉ２、Ｇｅ４７．８、Ｔｅ５０．２） Ａ２（Ｂｉ８、Ｇｅ４１．２、Ｔｅ５０．８） Ｂ１（Ｂｉ８、Ｇｅ４６、Ｔｅ４６） Ｂ２（Ｂｉ４、Ｇｅ４８、Ｔｅ４８） （但し、三角組成図上の座標は原子％である。） 【選択図】なし

磁気ディスク

(57)【要約】 【課題】 高記録密度において低エラーレートを達成す る熱可塑性樹脂を用いて成形した基板から成る磁気ディ スクを提供する。 【解決手段】 熱可塑性樹脂を用いて成形する基板に、 少なくとも磁性層が形成される磁気ディスクのデータ記 録領域の最外径部における基板の厚さがデータ記録領域 の最内径部における基板の厚さよりも厚くする。

光記録媒体

【課題】 逆積層構造の記録層から良好な反射信号及びプッシュ−プル信号振幅が得られる光記録媒体を提供すること。 【解決手段】 所定の溝深さ（Ｄ）（ｎｍ）のプリグルーブが形成された基板上に反射層と色素記録層とが積層された逆積層構造のディスク基板を有する光記録媒体において、色素記録層の膜厚を、レベリング係数Ｃ Ｌ が、 【数１】 で示される範囲内になるように調製することにより、色素記録層から所定の反射信号及びプッシュ−プル信号振幅が得られる光記録媒体。 （但し、レベリング係数Ｃ Ｌ は、下記式（１）で定義される。 【数２】 式（１）中、ｄ Ｌ は、色素記録層におけるランドの部分の膜厚（ｎｍ）である。ｄ Ｇ は、色素記録層におけるグルーブの部分の膜厚（ｎｍ）である。） 【選択図】 図１

光磁気記録用コイルおよびその製造方法ならびに光磁気記録装置

(57)【要約】 【課題】 光磁気記録媒体に印加する記録磁界を高速に スイッチングできる光磁気記録用コイルを提供する。 【解決手段】 光磁気記録媒体２０の光磁気記録層２３ と対向するように配置される透明な磁界変調用コイル基 板３と、その磁界変調用コイル基板３上に形成され途中 が途切れて光ビーム透過部９を形成した軟磁性膜１３ と、その軟磁性膜１３上に施された薄膜コイル４とを有 していることを特徴とする。

ディスクの偏心量測定方法及び偏心量測定装置

【課題】高価な計測機器を必要とせず、さらに、いかなるディスクに対してもディスク偏心量を容易に測定することができる方法及び装置を提供する。 【解決手段】本発明における情報記録ディスクの偏心量測定方法では、ディスク上のミラー部とフォーマット領域との境界部を横断するように光ビームを移動させながら照射し、その戻り光の光量変化を検出することにより、ディスクの偏心量を測定する。ディスクのミラー部とフォーマット領域における照射面形状の違いによる戻り光の光量変化を、ディスクの回転時の角度座標毎に求める。上記戻り光が所定の光量に達したときの各回転座標毎の光ビームの移動量を求め、その最大移動量と最小移動量の差を求めることでディスクの偏心量を求めることができる。 【選択図】　　　　図２

光記録媒体

【課題】記録再生光として青色レーザを用いて、２層の色素記録層を有する光記録媒体の記録感度を向上させる。 【解決手段】光透過性の第１基板１０１側から照射されるレーザ光１２０（青色レーザ）により情報が記録される第１記録層１０２と、第１記録層１０２を透過した青色レーザにより第１記録層１０２と略同程度の記録感度で情報が記録される第２記録層１０６とを有し、第１記録層１０２に形成される記録マークの反射率（Ｒ ０１ ）が、記録マークが形成されない部分の反射率（Ｒ ００ ）より低く（Ｒ ００ ＞Ｒ ０１ ）なり、第２記録層１０６に形成される記録マークの反射率（Ｒ １１ ）が、記録マークが形成されない部分の反射率（Ｒ １０ ）より高く（Ｒ １０ ＜Ｒ １１ ）なる光記録媒体１００。 【選択図】図１

情報記録再生装置

【課題】 基板が薄く可撓性を有する情報記録ディスクの回転ブレをより小さくするとともに、より簡易で小型化が可能な情報記録再生装置を提供する。 【解決手段】 可撓性を有する情報記録ディスクに情報を記録及び再生する第１ヘッドと、情報記録ディスクを回転させるスピンドルと、情報記録ディスクの回転時に情報記録ディスクの姿勢を安定化させるための第１姿勢安定化部材とを備え、第１姿勢安定化部材が情報の記録または再生時に第１ヘッドが情報記録ディスクの径方向に移動する通路を有することを特徴とすること情報記録再生装置を提供する。 【選択図】 図１

光磁気記録媒体及びその再生方法

(57)【要約】 【課題】 ゴースト信号の発生を防止し、再生磁界を印 加することなく磁区拡大再生することが可能な光磁気記 録媒体及びその記録再生装置を提供する。 【解決手段】 光磁気記録媒体は、記録層５、中間層４ 及び再生層３を備える。再生層３は希土類金属優位の希 土類遷移金属合金から形成され、中間層４及び記録層５ は遷移金属優位の希土類遷移金属合金から形成される。 中間層４は１４０℃以上で面内磁化を示すので再生時に 記録層５と再生層３の交換結合力を遮断する。中間層４ と再生層の静磁的反発力により、再生層３に転写された 磁区３Ａは最小磁区径の大きさに拡大する。ゴースト信 号の発生を防止することができる。

光磁気記録媒体及びその再生方法

【課題】ゴースト信号の発生を防止し、再生磁界を印加することなく磁区拡大再生することが可能な光磁気記録媒体及びその記録再生装置を提供する。 【解決手段】光磁気記録媒体は、記録層５、中間層４及び再生層３を備える。再生層３は希土類金属優位の希土類遷移金属合金から形成され、中間層４及び記録層５は遷移金属優位の希土類遷移金属合金から形成される。中間層４は１４０℃以上で面内磁化を示すので再生時に記録層５と再生層３の交換結合力を遮断する。中間層４と再生層の静磁的反発力により、再生層３に転写された磁区３Ａは最小磁区径の大きさに拡大する。ゴースト信号の発生を防止することができる。 【選択図】　図８

光磁気記録媒体

【課題】ゴースト信号の発生を防止し、再生磁界を印加することなく磁区拡大再生することが可能な光磁気記録媒体及びその記録再生装置を提供する。 【解決手段】光磁気記録媒体は、記録層５、中間層４及び再生層３を備える。再生層３は希土類金属優位の希土類遷移金属合金から形成され、中間層４及び記録層５は遷移金属優位の希土類遷移金属合金から形成される。中間層４は１４０℃以上で面内磁化を示すので再生時に記録層５と再生層３の交換結合力を遮断する。中間層４と再生層の静磁的反発力により、再生層３に転写された磁区３Ａは最小磁区径の大きさに拡大する。ゴースト信号の発生を防止することができる。 【選択図】　図８

光ディスク及び光ディスクの製造方法

(57)【要約】 【課題】 膜厚均一性に優れた透明樹脂層を有する光デ ィスク及びその製造方法提供する。 【解決手段】 光磁気記録ディスク100の透明樹脂層は 透明樹脂層形成フィルムを用いて積層される。この方法 を用いることで膜厚均一性に優れた透明樹脂層を有する 光磁気記録ディスクを製造することが可能となる。

レンズユニットおよびカメラモジュール

【課題】レンズを暖めるヒータの熱によってレンズ表面上の反射防止膜が悪影響を受けないようにするレンズユニットおよびカメラモジュールを提供する。【解決手段】本発明のレンズユニット１１は、レンズ群Ｌを構成する最も物体側に位置されるガラス製の第１のレンズ１３と隣接する樹脂製の第２のレンズ１４の表面に反射防止膜３０Ａが設けられるとともに、第１のレンズ１３の像側に面する表面１３ｂと第２のレンズ１４の物体側に面する表面１４ａとの間にヒータ４０が介挿される。反射防止膜３０Ａは、ヒータ４０の熱に伴う第２のレンズ１４の熱膨張によって成膜状態が外観上変化しない耐熱性を有する。【選択図】図１

情報記録媒体、情報記録媒体の製造方法、情報記録媒体製造装置及び情報記録媒体記録再生装置

【課題】 青色レーザを用いて記録再生する場合に、トラッキング特性に優れ、且つ、高速回転に耐え得る機械的強度を有し、さらに、耐環境性が高められた情報記録媒体を提供すること。 【解決手段】 ディスク基板１１０と、記録層１２０と、保護層１３０と、内孔１４０と、内孔１４０と同軸に配置された磁性板１５０と、ディスク基板１１０の基板の内周孔１４１の端面に形成され、低透湿度の特性を有する内孔形成部１６０とから構成された単板型の光情報記録媒体１００は、ディスク基板１１０を回転させながら、顕微鏡を用いてトラックサーボ用のグルーブ又はプリピットを観察し、１回転毎に生じる偏心を低減させるようにディスク基板１１０を移動させ、トラック中心とディスク基板１１０の回転中心との偏心量が１５μｍ以下になるように調整されている。ディスク基板１１０の移動は、ディスク基板１１０のエッジに取り付けたＸ−Ｙステージによって行われる。 【選択図】 １

光学記録媒体および光学記録媒体の製造方法

【課題】高速回転における面振れが低減し、情報信号の記録および／または再生の信頼性が高い光学記録媒体を提供すること。 【解決手段】 中心にセンターホール２が空けられた平面円環形状の基板１と、この基板１上に、基板１と略同一の外径とセンターホール２の外径より大きい内径とを有する記録再生機能層５及びカバー層３が積層され、カバー層３とは別体として、記録再生機能層５及びカバー層３の内径より小さい外径を有し、基板１を保持固定するためのクランプ部４が、カバー層３が形成されない領域であるセンターホール２の周囲に設けられた光学記録媒体１０。 【選択図】 図１

磁気デイスク

(57)【要約】 【課題】 耐久性および耐食性にすぐれるとともに、材 料コストも安価であり、作りやすい磁気デイスクを提供 する。 【解決手段】 合成樹脂製基板１のプリフオ―マツトパ タ―ン形成面に磁性層３を設けた表側および裏側用の２ 枚のデイスク母体ＭＡ，ＭＢを、両基板１，１の裏面同 志を接着し一体化させて、磁気デイスクを構成する。

Information-recording medium

光磁気記録媒体及びその再生方法

【課題】ゴースト信号の発生を防止し、再生磁界を印加することなく磁区拡大再生することが可能な光磁気記録媒体及びその記録再生装置を提供する。 【解決手段】光磁気記録媒体は、記録層５、中間層４及び再生層３を備える。再生層３は希土類金属優位の希土類遷移金属合金から形成され、中間層４及び記録層５は遷移金属優位の希土類遷移金属合金から形成される。中間層４は１４０℃以上で面内磁化を示すので再生時に記録層５と再生層３の交換結合力を遮断する。中間層４と再生層の静磁的反発力により、再生層３に転写された磁区３Ａは最小磁区径の大きさに拡大する。ゴースト信号の発生を防止することができる。 【選択図】　図８

情報記録ディスクの表面欠陥検査方法及びその装置

【課題】リファレンスデータの記録に大容量のメモリを必要としない、欠陥検査方法及びその欠陥検査装置、並びに、ＩＤ部を含むディスクの全域にわたって欠陥部を発見することができる欠陥検査方法及び欠陥検査装置を提供する。 【解決手段】本欠陥検査装置の光照射部から照射された光はディスクのプリピットが形成されているフォーマット領域に照射され、光検出部で検出したディスクからの戻り光の光量が測定される。同時に、ディスクを回転させ、ディスクの回転角度位置を測定する。次いで、ディスクの異なる半径位置で取得した回転角度毎の戻り光の光量の平均値を求め、この平均値をリファレンス光量とする。このリファレンス光量と測定した戻り光の光量との差分をディスクの回転角度毎に算出し、その値が所定の値以上であった場合にディスク表面上に何らかの異常があると判断する。 【選択図】　　　　図２