Victor Company of Japan, Limited

Hiromitsu Takenaka

Shigeo Shimizu

Toshio Konno

Nozomu Ohkouchi

Masanobu Shigeta

Tadayuki Shimada

Tetsuhiro Yamazaki

Dai Imanishi

Hiroyuki Natsuhori

Kazushige Ohtawara

Yuichi Kuromizu

A spacial light modulation device is composed of a photoconductive layer, a pixel electrode layer, a dielectric reflection layer, and a liquid crystal layer all laminated in sequence between first and second drive electrode layers. The pixel electrode layer includes a plurality of pixel electrodes partitioned by an insulating substance layer and arranged at predetermined intervals. In particular, to obtain higher contrast and higher resolution of the modulated and reflected light by the device, the surface area of each of the pixel electrodes formed on the photoconductive layer side is determined smaller than that formed on the dielectric reflection layer side. That is, in the pixel electrode layer, a plurality of square-shaped pixel electrodes are arranged into a matrix pattern at predetermined intervals. Each of the square-shaped pixel electrode is composed of a Schottky contact portion in contact with the photoconductive layer and a pixel composing portion in contact with the dielectric reflection layer. The contact area of the Schottky contact portion with the photoconductive layer is determined smaller than the contact area of the pixel composing portion with the dielectric reflection layer. It is also preferable that a dielectric planarized layer is further formed between the pixel electrode layer and the dielectric reflection layer to planarize the surface of the dielectric reflection layer.

Spacial light modulation device including a pixel electode layer and a

A spatial light modulator capable of displaying a good contrast and high resolution moving pictures without an after-image effect is disclosed. The modulator comprises a pair of transparent electrodes for generating an electric field therebetween and at least a photoconductive member and a photo modulation member being laminated and interposed between the transparent electrodes, the photoconductive member is a film having a thickness ranged from 10 .mu.m to 30 .mu.m and is made of hydrogenated amorphous silicon doped with boron such that an amount of the boron with respect to silicon in the hydrogenated amorphous silicon in atomic percent is, 0.1 to 1.0 ppm. To enhance the modulator performance, a thickness of the photoconductive member is so selected to have light absorptance ranged 70% to 95% at a wavelength of a writing light which writes information in the modulator.

Spatial light modulator with photoconductor of hydrogenated amorphous

A spatial light modulator capable of providing high contrast ratio and resolution moving pictures without an after-image effect is disclosed. The spatial light modulator comprises a pair of transparent electrodes for forming a driving electric field therebetween, and at least one photo-modulation member and a photoconductive member laminated between the pair of transparent electrodes, where the photoconductive member comprises a hydrogenated amorphous silicon film having thickness of 10 .mu.m to 30 .mu.m, and is doped with boron as such that an amount of the boron in the hydrogenated amorphous silicon film in atomic ratio with respect to silicon therein is 0.1 ppm to 1 ppm.

There is provided an optical image processor for forming a charge image according to a first optical image by photoelectric effect when illuminated with an electro-magnetic radiation beam for writing carrying the first optical image and forming, in accordance with the charge image, a second optical image correlating with the first optical image by light-modulation when illuminated with an electro-magnetic radiation beam for reading, in the presence of an electric field. The processor comprises a plurality of photoconductive segments two-dimensionally arranged with a space among the photoconductive segments for forming the charge image when illuminated with the electro-magnetic radiation beam for writing and a high resistive member provided in the space for preventing transfer of electric charges of the formed charge image among the photoconductive segments.

Optical image processor

A spatial light modulator providing an improved contrast, has a laminated structure of multiple layers including typically a photoconductive layer, an optical modulation layer, and a pair of electrode layers interposing the photoconductive and optical modulation layers. The thickness of at least one of the electrode layers having a predetermined relationship with a wavelength of light incident to the one of the electrode layers for writing or reading-out information into or from the spatial light modulator. The electrode layer may further comprise an electrode member and an intermediate layer disposed between the electrode member and an adjacent layer laminated adjacent to the one of the electrode layers, the electrode member having a first refractive index, the adjacent layer having a second refractive index, and the intermediate layer having a third refractive index determined to be in between the first and second indices, the thickness of the intermediate layer having an another predetermined relationship with the wavelength of the light incident to the one of the electrode layers for writing or reading-out information into or from the spatial light modulator. The intermediate layer may be a single layer-member or multiple layer-members having different refractive indices each other.

Spatial light modulator

A spatial-light modulator provided with a first electrode formed by a transparent member that receives irradiation of write light corresponding to an optical image in order to form a charge image; a second electrode formed by a transparent member to receive read light irradiated in order to read a formed charge image and to discharge output light equivalent to a read charge image; an optical modulation layer provided to the first electrode side of the second electrode and formed by polymer dispersed liquid crystal material in order to change the intensity distribution of the read light irradiated via the second electrode in accordance with an electrical field intensity distribution due to the charge image; a photoconductive member provided between the first electrode and the optical modulation layer, formed with two different materials of at least amorphous silicon carbide and amorphous silicon as the primary components, and formed in a plural number of layers and having a laminated structure having an optical sensitivity that differs between the first electrode side and the second electrode side; and a dielectric mirror provided between the optical modulation layer and the photoconductive member, that reflects the read light modulated by the optical modulator in the direction of irradiation, and performs the reading of the charge image.

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Yokosuka, Japan

Hiromitsu Takenaka