Abstract: A hologram recorder includes a light source for emitting a laser beam, a polarizing beam splitter for splitting the laser beam into a recording beam and a reference beam in accordance with a state of polarization, and a rotary polarizer located between the light source and the polarizing beam splitter. The rotary polarizer has the function of optical rotation, whereby a polarization component to be the recording beam is increased from the central portion toward the peripheral portion of the laser beam, and a polarization component to be the reference beam is decreased from the central portion toward the peripheral portion of the laser beam.

Abstract: A hologram recorder is provided, in which coherent light from a light source is split into a signal beam and a reference beam, and the signal beam is modulated by a spatial light modulator to be directed to a hologram recording medium, while the reference beam is directed to the hologram recording medium to overlap with the signal beam for recording a hologram on the hologram recording medium. The hologram recorder includes a beam phase modulator provided with a plurality of optical devices (20p, 20p?) each configured to assume one of two modes such as ON mode and OFF mode, the ON mode for causing the reference beam to be passed or reflected in a predetermined direction toward the hologram recording medium, the OFF mode for causing the reference beam to be blocked or directed in another direction other than the predetermined direction. Each optical device (20p, 20p?) provides a phase difference 0 or ?.

Abstract: A hologram recorder (A2) includes: a light source (10) for emitting a coherent beam; a spatial light modulator (20) provided with unit areas having a plurality of beam reflection elements (21) to reflect the beam from the light source (10) in a main direction as a signal beam or a cut-off direction; and a signal beam optical system (30, 31) for directing the signal beam to the hologram recording medium B. The recorder (A2) further includes: a wavefront reshaper (40, 41, 42) for condensing the beams thinned out in the cut-off direction by the beam reflection element (21) of the modulator (20), and reshaping the wavefront of the condensed beams; and a reference beam optical system (50, 51) for directing the beam from the reshaper (40, 41, 42) to the recording medium (B) as a reference beam to be shone in an overlapping manner with the signal beam.

Abstract: A hologram recording medium includes a hologram recording layer and a transparent substrate layer stacked on the hologram recording layer. The recording layer records an interference pattern of a recording beam and a reference beam. The transparent substrate layer has an inner surface facing the hologram recording layer, and this surface is formed with trace zones for guiding the recording beam and the reference beam in a prescribed guide direction. The trace zones have a higher reflectance than that of the remaining area in the inner surface of the transparent substrate layer.

Abstract: A hologram recorder A1 includes a light source (1) of a coherent light beam and a spatial light modulator (5A) for modulating a part of the light beam from the light source (1) into a recording beam which carries two-dimensional information. Another part of the light beam is used as a reference beam to interfere with the recording beam. The recording beam and the reference beam are directed to a hologram recording medium (B). A semi-translucent optical device (4) is disposed between the light source (1) and the spatial light modulator (SA) for letting a part of the beam travel to the spatial light modulator (5A) as a transmitted beam while letting another part of the beam travel to the hologram recording medium (B) as a reflected beam. The recording beam and the reference beam, after being separated from each other by the optical device (4) as the transmitted beam and the reflected beam, travel along the same optical path (L) to irradiate the hologram recording medium (B).

Abstract: A communication device with a time authentication requesting function uses timestamp technology to verify a device operation. When receiving an instruction for e-document scan, the communication device transmits a hash value of scanned data of an original to a TSA, and receives a timestamp from the TSA. Then, the communication device stores the scanned data assigned with the timestamp in a prescribed folder, and stores e-document scan history. When receiving an instruction for fax communication, after carrying out fax transmission, the communication device stores fax communication history. When stored history data reaches a prescribed amount, a timer time at that point of time is added to the history data, and the history data is encoded. The communication device transmits a hash value to the TSA, and receives a timestamp from the TSA. Then, the communication device stores the history data assigned with the timestamp in a prescribed folder.

Abstract: An image scanning device with a time authentication requesting function enables documents, not subject to be converted into e-documents, to be easily converted into e-documents at a later date, and reduces costs required for assigning a timestamp. When a user instructs an account book e-document temporary scan, an original is scanned and stored. An account book temporary file name is assigned to the scanned original, and stored in an account book temporary folder. When the user instructs an estimate e-document temporary scan or a purchase order e-document temporary scan, scanned data of the original is assigned with a file name and stored in a temporary folder of each document type. Documents not subject to be converted into e-documents are stored under the same format as the e-document, and a timestamp is assigned collectively to necessary documents at a later date. Accordingly, costs required for the timestamp can be reduced.

Abstract: When executing e-document scan, an image scanning device scans a document and stores scanned data. After resetting a timer, the image scanning device calculates a hash value of the scanned data, and transmits the calculated hash value to a TSA to request the TSA to issue a timestamp. When receiving a timestamp from the TSA, the image scanning device stores the scanned data and the timestamp in an e-document folder. When failing to receive a timestamp within a prescribed period of time after requesting the timestamp, the image scanning device adds a comment to the scanned data indicating that the timestamp failed to be received, and prints out the scanned data with the comment.

Abstract: A recording and reproducing apparatus includes a light source to emit a laser beam, an information light beam irradiation unit to irradiate a medium with an information light beam, a reference light beam irradiation unit to irradiate the medium with a reference light beam so as to form a specific speckle pattern on the medium. The reference light beam irradiation unit comprises a diffusion board provided in the way of a light path through which the laser beam is passed and generating the reference light beam, a rotation controller to rotate the diffusion board, and an identification information detector to detect identification information previously formed on a surface of the diffusion board. The diffusion board comprises a plurality of encode storage regions in which different identification information is formed and a plurality of diffusion pattern generation regions specified by the identification information.

Abstract: An automatic irrigation system having a simplified structure can intermittently supply water (and liquid fertilizer) required by farmer products under water saving conditions depending on the weather condition of the day independent of the size of an irrigation area. Water from a water source is pumped by a motor pump driven with electric power generated by a solar panel and stored in a storage tank. When a predetermined amount of water is stored in the tank, a water draining device continuously drains the stored water. This cycle is repeated in proportion to an amount of solar radiation incident on the solar panel. The water is then guided to the irrigation area with a tube irrigation system.

Abstract: A magnetooptic head includes a lens (11b) which forms a beam spot on a disc, a magnetic field generating coil (2) between the lens (11b) and the disc, and a magnetic layer (3) between the coil (2) and the lens (11b). The magnetic layer (3) is provided by a plurality of magnetic members (30) disposed radially of an optical axis of the lens (11b). The magnetic layer (3) and the lens (11b) are mediated by a thermal conduction layer (5), and the thermal conduction layer (5) is provided, integrally therewith, a thermal conduction section (50) which extends a space between mutually adjacent magnetic members (30) in the magnetic layer (3), for reception of heat.

Abstract: A magneto-optical head including a lens forming a light spot on a storage disk, a magnetic field generating coil arranged between the lens and the disk to surround the optical center of the lens, and an annular heat sink arranged around the coil. The distance between the outer circumference of the coil and the inner circumference of the heat sink is 70–100 ?m.

Abstract: A hologram recorder is provided for recording a hologram on a hologram recording medium by interference of a recording beam with a reference beam. The recorder includes a light source for outputting coherent light to be split into the recording beam and the reference beam; a spatial light modulator for modulating the recording beam into a form representing information to be recorded; an objective lens for outputting the recording beam; and a phase shift mask provided at a light entering surface of the spatial light modulator. The mask is configured to allow the recording beam to pass through, and also to partially shift the phase of the recording beam passing through the mask.

Abstract: A hologram recording and reproducing apparatus includes a movable galvanomirror, a mirror controller and a reproduction unit. The galvanomirror guides a reference beam toward a hologram recording medium and changes the incident angle of the reference beam. The mirror controller causes the galvanomirror to move for adjusting the incident angle to a predetermined angle for hologram recording. In reproducing the recorded information, the mirror controller causes the galvanomirror to move, so that the incident angle continuously changes within a predetermined range including the predetermined angle. The reproduction unit receives a detection signal from an optical detector while the incident angle changes continuously. The detection signal corresponds to the intensity of a reflected beam from the hologram recording medium. The reproduction unit reproduces the recorded information, based on the detection signal, when the intensity of the reflected beam is over a predetermined level or reaches the maximum.

Abstract: A hologram recording and reproducing apparatus minimizes reproduction errors by servo control on the tilting of a reference beam relative to a hologram recording medium. The apparatus includes an optical detector for servo control and an optical sensor for reproduction signal conversion. A pixel pattern generator generates, on a wave surface of the recording beam, a discretely distributed recording pixel pattern corresponding to the information to be recorded, and a specifically shaped and localized servo pixel pattern for the servo control. A beam splitter splits the reflected beam from the hologram recording medium into a reproduction beam directed to the optical detector for reproduction signal conversion and a servo beam directed to the optical detector for servo control. A servo controller controls the tilting of the reference beam relative to the hologram recording medium, based on an output signal from the servo control optical detector.

Abstract: A communication terminal device by which it is possible to reduce the communication expenses, and to improve operational performance. The communication terminal device includes a CODEC circuit which has communication ability of a V.34 mode, is formed by a hardware, and codes and decodes image data. The communication terminal device includes a CODEC program which has the communication ability equal to or lower than a V.17 mode, and codes and decodes image data. When reading an image by an image reading unit and coding the image data by the CODEC circuit, or when decoding a coded image data by the CODEC circuit and printing the image of the image data by an image printing unit, if a calling demand for the communication is generated, a main control unit waits for processing completion of coding or decoding by the CODEC circuit, and starts the calling of the communication.

Abstract: A hologram recording medium includes a hologram recording layer and a transparent substrate layer stacked on the hologram recording layer. The recording layer records an interference pattern of a recording beam and a reference beam. The transparent substrate layer has an inner surface facing the hologram recording layer, and this surface is formed with trace zones for guiding the recording beam and the reference beam in a prescribed guide direction. The trace zones have a higher reflectance than that of the remaining area in the inner surface of the transparent substrate layer.

Abstract: A disk-type hologram recording medium and a hologram recording and reproduction device utilizing such a recording medium are provided. The hologram recording and reproduction device includes a spatial optical modulator provided with a plurality of optical elements arranged in a grid-like form. These optical elements are divided into groups each associated with 1 bit of data for performing required light modulation. Thus, a special pattern exhibiting a greater S/N margin for 1 bit can be recorded in the recoding medium. During data recording or data reproduction, the special pattern is read from the recording medium, and based on the retrieved special pattern, fine adjustment by servo control is conducted for adjustment of tilting or focusing of the recording medium and for adjustment of the wavelength of the light emitted from the light source.

Abstract: An image processing device with a voice guidance function includes a voice guidance control key and a voice output control unit. When the voice guidance control key is operated during a voice output, the voice output control unit controls to stop the voice output. When the voice guidance control key is operated during a stop mode, the voice output control unit controls to play the stopped voice guidance.

Abstract: The present invention efficiently radiates heat generated by a coil while suppressing a decrease in the efficiency of generation of magnetic fields caused by an eddy current. The present invention includes a coil extending spirally in a plane and covered with a dielectric material, a magnetic substance provided parallel with the plane so as to overlap the coil, and a radiator extending in the plane so as to surround the coil and having projecting portions which project toward an outermost periphery of the coil and groove portions recessed in a direction opposite to that in which the projecting portions project, the projecting portions and the groove portions being alternately arranged, the radiator having a higher thermal conductivity than the magnetic substance.