Abstract: An optical scanning device is disclosed that includes a rotary polygon mirror and an air current rectifying mechanism. The air current rectifying mechanism is positioned with a surface that is substantially parallel to an end surface of the rotary polygon mirror. At least one specified condition is satisfied to insure that negative pressure regions are prevented from forming on planar surfaces of the rotary scanning mirror when the scanning mirror is rotated by a scanning motor. In this manner, dust that normally tends to be deposited on the scanner mirror planar surfaces by eddy currents that form as a result of these negative pressure regions is prevented from adhering to the rotary scanning mirror surfaces. Thus, optical performance of the scanning mirror is maintained over time.

Abstract: An optical scanning device has an electric motor and a rotary polygon mirror driven by the electric motor which are received in a dust proof chamber equipped with a cooling fin arrangement which

Abstract: Provided are a light source apparatus capable of preventing a shift in an optical path of a light beam, and an optical scanner comprising the light source apparatus. An optical scanner comprises a light source apparatus in which four light sources corresponding to four colors Y, M, C and B are supported as a unit by one holder. The light sources are integrally disposed in a specific position (a position where the holder is disposed) on an optical base as a supporting base, so even if distortion of the optical base occurs resulting from a dynamic load, ambient temperature or the like, an influence of the distortion is exerted upon each of the light sources supported by the holder to substantially the same extent. Even if a shift in the whole arrangement of the light sources occurs, a large shift in a positional relationship between each light source does not occur.

Abstract: An optical scanning device is disclosed that includes a rotary polygon mirror and an air current rectifying mechanism. The air current rectifying mechanism is positioned with a surface that is substantially parallel to an end surface of the rotary polygon mirror. At least one specified condition is satisfied to insure that negative pressure regions are prevented from forming on planar surfaces of the rotary scanning mirror when the scanning mirror is rotated by a scanning motor. In this manner, dust that normally tends to be deposited on the scanner mirror planar surfaces by eddy currents that form as a result of these negative pressure regions is prevented from adhering to the rotary scanning mirror surfaces. Thus, optical performance of the scanning mirror is maintained over time.

Abstract: An adjustment system for a plate-like member includes a cam member formed with an appropriate cam curve in contact with front or rear surface of, for example, a reflector installed in an optical scanner to reflect a scanning beam of an optical scanner so that a reflecting direction of this reflector may be adjustably varied by rotating the cam member and optical and scanning characteristics of the optical scanner may be ensured.

Abstract: A control section (3) outputs control information necessary for generating processing of despreading codes, address information necessary for reading-out processing of despreading codes, and timing information; a original code generating section (1) generates despreading codes, based on the control information; and a code accumulation section (2) stores the despreading codes for each address corresponding to the delay time of the multi-paths. And, a code reading-out section (4) receives despreading codes, which have been read out based on the address information, corresponding to each path, and outputs the received despreading-codes based on the timing information; a demodulating section (5) separately demodulates received signals, using despreading codes corresponding to each path; and a symbol combining section (6) combines all the demodulated signals.

Abstract: An optical scanner assembly has optical members divided and arranged on the front and reverse surfaces of a base, thereby reducing the size of the base such that the base can be formed of metal without an increase in cost in order to allow the optical and scanning characteristics to remain stable with time. In one embodiment, a laser light source, a collimator lens, and a cylindrical lens are on the reverse surface of a chassis with reference to mounting references prepared on the reverse surface, while a reflective return mirror, a polygonal mirror, and f&thgr; lenses are mounted on the front surface with reference to mounting references prepared on the front surface.

Abstract: An optical scanning device for scanning a subject medium with a scanning beam that is oscillated by a polygon mirror along a straight line on the subject medium is provided with a rotational speed variation restraint partition which operates to restrain an occurrence of momentary rotational speed variations of the polygon mirror due to turbulence of a current of air that are caused by high speed rotation of the polygon mirror.

Abstract: A reflector guiding an optical axis is housed in a mirror holder with a compression spring disposed therebetween so that the reflector is biased by the compression spring to move backward. A mirror retainer is rotatably supported by a rear cover for the mirror holder and the reflector is supported by a pair of supporting projections and an adjusting screw to bear against the rear surface of the reflector. The reflector tilts as the projection length of the adjusting screw is changed while the direction in which the effective surface of the reflector faces is changed as the mirror retainer is rotated and thereby the angular position of the adjusting screw is changed.

Abstract: An optical scanner assembly has optical members divided and arranged on the front and reverse surfaces of a base, thereby reducing the size of the base such that the base can be formed of metal without an increase in cost in order to allow the optical and scanning characteristics to remain stable with time. In one embodiment, a laser light source, a collimator lens, and a cylindrical lens are on the reverse surface of a chassis with reference to mounting references prepared on the reverse surface, while a reflective return mirror, a polygonal mirror, and f&thgr; lenses are mounted on the front surface with reference to mounting references prepared on the front surface.

Abstract: An adjustment system for a plate-like member includes a cam member formed with an appropriate cam curve in contact with front or rear surface of, for example, a reflector installed in an optical scanner to reflect a scanning beam of an optical scanner so that a reflecting direction of this reflector may be adjustably varied by rotating the cam member and optical and scanning characteristics of the optical scanner may be ensured.

Abstract: An image data transmission system includes mobile transceivers having memories storing image data that is organized in sequential blocks. The mobile transceivers sequentially pass by a stationary transceiver and pause proximate the stationary transceiver. While pausing, a mobile transceiver transmits a block of the image data to the stationary transceiver, which receives and stores the transmitted data. Data transmission is interrupted by movement of the formerly pausing mobile transceiver. The stationary transceiver transmits a pointer signal to a paused mobile transceiver indicating which blocks of image data have been stored in the stationary transceiver so that the mobile transceivers transmit the blocks sequentially until all blocks have been received and stored by the stationary transceiver. The apparatus may be employed in a mass transit system, such as a subway or commuter train, in which the mobile transceivers are mounted in train cars and the stationary transceiver is located at a station.

Abstract: A light source illuminates a manuscript, and a light from the manuscript enters a prism block through a slit. The prism block has two pairs of parallel reflective planes which are different in length, and a light from an incident plane is reflected at least once on each reflective plane and exits an outgoing plane. The light from the outgoing plane is conducted to a CCD via a lens so as to read information about an image on the manuscript.

Abstract: The light source unit (lid), which is substantially a right triangle, is supported to be freely rotatable via the hinge at the bottom of the main body casing. The light source for illumination and the assist roller are arranged in the light source unit. When operating the scanner system, the scanning window is opened by rotating the light source unit. When not operating, the scanning window is closed by rotating the light source unit to the right bottom of the main body casing, and the scanning face is protected. Moreover, the magnets are used to lock and hold the light source unit in the opening state or the closing state. The main power source is turned on when the opening state of the lid is detected by the Hall sensor or the reed switch, and the scanner system becomes operatable.

Abstract: Each reflective wall of two pairs of parallel reflective walls, which compose a four-wall reflection optical system, consists of three layers of a first dichroic mirror which reflects blue light, a second dichroic mirror which reflects green light, and a third dichroic mirror which reflects red light. In the four-wall reflection optical system, the total number of reflections varies according to the ratio of lengths of two pairs of the parallel reflective walls. For this reason, by selecting the number of reflections, it is possible to form an optical path of desired length and to color-separate the incident light into three rays of the three primary colors at desired separation intervals. A color scanner optical system can easily be constructed by using the color separation optical system and a 3-line CCD.

Abstract: A recording and reproducing device includes a first lever and a second lever. The first lever has a projection on the free end and a first rotating shaft on the fixed end. The projection comes into contact with the slider of a cassette and open the slider. The second lever has a first rotating shaft on one end, a second rotating shaft at the central portion thereof, and has a restricting member on the other end, for restricting the rotary movement of the first lever. With this arrangement, an increased radius of rotation of the projection and an increased angular moment are achieved when the cassette is pushed into the device and the movement of the slider is started. Therefore, reduced power is required to push the first lever when starting the movement of the slider.

Abstract: A static video telephone for sending an image captured by an image capture-system and receiving a video signal transmitted over a telephone line. A video signal formed for transmission has a frame format including a phase shift correction data signal in addition to a frame synchronization signal, an amplitude calibration signal, an ID (information data) signal, and image data signal. The video telephone includes a frequency shift correction data generating circuit which is activated when frequency shifts are detected in the received signal and produces frequency-shift correction data. The frequency-shift correction data is then delivered to a subsequent demodulation timing generating circuit which scales phase errors in the received signal to produce phase error correction data. Both frequency-shift correction data and phase error correction data are combined together to produce a demodulation timing signal. With this signal, the received signal is demodulated.

Abstract: A still picture video telephone transmission system for transmitting and receiving, via a telephone line, a still picture taken by a camera; a picture signal is transmitted and received by a transmitting circuit and a receiving circuit, to which improvements are made so as to display a still picture clearly without distortion. For this purpose, the transmitting circuit sends picture element signals together with image correcting signals such as a picture element displacement detecting signal, a phase inversion detecting signal, and settling data. The receiving circuit detects the image correcting signals in the picture element signal, and makes the necessary corrections so as to enable the still picture to be displayed in good shape.

Abstract: A rotary head type magnetic recording/reproducing device includes a stationary drum, and a rotary drum disposed coaxially with the stationary drum and secured to the rotary shaft of the motor. The rotary drum has a cylindrical portion which is slightly greater in diameter than the stationary drum, a first truncated cone portion integrally connected to the cylindrical portion at a bottom thereof and decreasing in diameter in a direction toward the stationary drum at a first taper angle, and a second truncated cone portion integrally connected to a top surface of the first truncated cone portion at a bottom thereof and decreasing in diameter in the direction toward the stationary drum at a second taper angle which is greater than the first taper angle.

Abstract: Method and device for measuring the brightness of an object in photographing the object in flash synchronization by use of an AE sensor capable of averaged overall light reading. In the method and device, in accordance with the distance of the object and also with the focal distance of a taking lens, an area occupied by a main object or a ratio of the occupation area on the light receiving surface of the AE sensor is estimated. Then, in accordance with said estimated occupation area or occupation area ratio of the main object and also with a measurement brightness B.sub.V(AV) measured by the AE sensor, there is found a brightness correction value .DELTA.B.sub.V which provides a value that increases as the occupation area of the main object increases and the measurement brightness B.sub.V(AV) measured by the AE sensor increases. Further, the thus obtained brightness correction value .DELTA.B.sub.V is added to the measurement brightness B.sub.V(AV) by the AE sensor to thereby find an object brightness.