Abstract: There is reproduced a three-dimensional image in which there is no dimness or no cross talk and which is light and high in resolution, by a three-dimensional information reproducing apparatus comprising a liquid crystal panel for displaying a discrete Fourier transform image, a light source array which is disposed to the rear of the liquid crystal panel and which emits parallel light, and a synchronous control device for switching, with time division, the discrete Fourier transform image that is displayed in the liquid crystal panel and also an angle of the parallel light that is emitted from the source light array.

Abstract: A three-dimensional display unit has a liquid crystal panel for simultaneously displaying a plurality of different parallax images and an optical characteristic variable lens attached to the liquid crystal panel. The optical characteristic variable lens is formed by an array of cylindrical lenses such that a transparent substance having high flexibility is supported by transparent electrodes from both substance sides and optical characteristics of each of the cylindrical lenses can be changed by applying a voltage to the transparent substance to change at least one surface shape of the transparent substance.

Abstract: There is provided an image input device-integrated type display device concurrently having an image display function, a document image input function, and a pen input function. A common electrode of the image input device-integrated type display unit is formed on a glass plate. A segment electrode is formed on a micro lens of a glass plate. An island electrode located at each pixel is connected to the segment electrode via a photoconductor. Liquid crystals are interposed between the common electrode and the island electrode. In an image input mode, light reflected on a document is applied to the photoconductor to control a voltage applied to the liquid crystals. In a pen input mode, light from an input pen is applied to the photoconductor to control a voltage applied to the liquid crystals. In an image display mode, a voltage applied to the liquid crystals is controlled according to image data of each pixel.

Abstract: An image processing apparatus comprises a liquid modulator having a photoconductive material including an image-writing plane, a liquid crystal layer laminated on the photoconductive material, a pair of electrodes sandwiching the photoconductive material and the liquid crystal layer, and a spacer inserted between the photoconductive material and one of the electrodes. Also provided are an analog writing system for analogously writing an original image in the light modulator; a digital reading system for digitally reading the image written in the light modulator; a processing section for image-processing the read image data; a digital writing system for digitally writing processed image data in the light modulator; and, an analog reading system for analogously reading an image written in the light modulator. The liquid crystal layer is either a phase-transition type liquid crystal, a p-type smectic A liquid crystal providing a storage function, or a ferroelectric liquid crystal providing a storage function.

Abstract: An image processing apparatus is provided to have a spatial light modulator onto and from which an image data is written and read, a digital reading system for digitally reading an image data written on the spatial light modulator, a processing unit for processing the read image data, and a digital writing system for digitally writing the processed data on the spatial light modulator. The digital reading or writing system serves to two-dimensionally move a laser beam on the spatial light modulator for reading or writing an image data from or onto the spatial light modulator. The digital reading or writing system provides a hologram disk having hologram lenses located in a concentric or spiral manner. The hologram disk is arranged to deflect the laser beam vertically and horizontally for scanning the spatial modulating element.

Abstract: An image processing apparatus includes a light modulator, an analog writing system for analogously writing an image of an original in the light modulator, a digital reading system for digitally reading the written image out of the light modulator, a processing section for processing the read image data, a digital writing system for digitally writing the processed image in the light modulator, and an analog reading system for analogously reading the image written on the light modulator. The light modulator includes a photoconductive material, a liquid crystal layer laminated on the photoconductive material, and a pair of electrodes sandwiching the photoconductive material and the liquid crystal layer. The liquid crystal layer can provide a storage function so as to enable the reading and writing of the image from the same direction.

Abstract: A fingerprint input apparatus is constructed to have simple construction. It serves to provide an excellen S/N ratio and reliably input a fingerprint pattern. The fingerprint input apparatus includes a light source for emitting a ray of light, a lightguide plate having a predetermined location at which a finger can be contact with the lightguide plate, a unit for directing the ray of light into at least one surfaces of the lightguide plate in a manner to keep such an angle of incidence as allowing the ray of light to be totally reflected within the lightguide plate, the lightguide plate being constructed to direct the ray of light into the predetermined location, and an image pickup unit located near the predetermined location of the lightside plate and outside of an opposite surface to a surface having the predetermined location, the image pickup unit being constructed to pick up a right irregularly reflected on a fingerprint surface of the finger contacted with the predetermined location.

Abstract: A variable interferometric device comprising a Fabry-Perot interferometer composed of a pair of reflecting substances facing each other with a space therebetween formed by spacers and a means for deforming at least one of the reflecting substances constituting said Fabry-Perot interferometer to thereby change the interferometric characteristics of said Fabry-Perot interferometer.

Abstract: A photoelastic element having reduced internal stress comprising a photoelastic material member; pedestal means; and a pair of supporting members integrally formed with the pedestal means for supporting the photoelastic material member, one of said pair of supporting members being adhered or bound to the photoelastic material member, and the other of said pair of supporting members being in contact with the photoelastic material member without being bound thereto.

Abstract: An expandable ceramic fiber felt to be used as a insulating material comprising ceramic refractory fibrous material, about 2 to 20 weight percent of expandable graphite flakes, and an organic binder. The graphite flakes expand upon heating thereby causing the ceramic fiber felt to expand to fill the gap of an expansion joint or seal of a furnace wall.