Abstract: A circuit for controlling scanning of light includes a detection-signal processing unit which generates a detection signal indicative of a timing at which a light beam hits a predetermined reference position, and a clock-generation unit which generates a clock signal in synchronism with the detection signal such that a timing of the clock signal is adjustable by the detection signal independently of a length of one clock cycle of the clock signal, wherein the clock signal synchronizes the light beam.

Abstract: An image forming apparatus includes: a plurality of light-emitting elements, each light-emitting element receiving a driving current from a power supply and converting the current into a beam; a plurality of driving elements, each driving element being interposed between the power supply and each light-emitting element and controlling the driving current based on an image signal; and a photoconductor on which the beams from the plurality of light-emitting elements form an image by scanning, wherein each light-emitting element is positioned so immediately adjacent to each driving element that a power leakage factor floating therebetween is reduced, whereby an intensity of the beam is substantially equivalent to the image signal in waveform.

Abstract: A color image forming device that can certainly correct uniform velocity error associated with the characteristic of each optical system and can realize high-quality color image printing by performing a fine laser beam irradiating position control, in consideration of an error in surface accuracy of each mirror surface of a rotary polygon mirror. The color image forming device includes a storage unit for holding uniform velocity correction data previously created for each mirror surface of a rotary polygon mirror to correct a distortion in expansion or contraction of the electrostatic latent image in the main scanning direction due to the characteristic of an optical system, and an image clock generating unit for reading uniform velocity correction data on each mirror surface used in the rotary polygon mirror at a scanning time out of the storage unit and then generating image clock pulses for image signal creation with a period corresponding to the uniform velocity correction data.

Abstract: A light scanning controller includes a plurality of light scanning parts for forming a latent image on a photoconductor by irradiating it with a scanning laser beam, and a clock controller for generating a timing signal by using a single clock signal obtained from a master clock oscillator to transmit the timing signal to each of the light scanning parts which controls the timing of the scanning laser beam on the basis of the timing signal received from the clock controller.

Abstract: An optical beam apparatus includes a light emission device, a driver for driving the light emission device with the applied VIDEO signal, an integral circuit for estimating a drop of the quantity of light emited by the light emission device from the VIDEO signal applied, and a light output control circuit for controlling the driver in compliance with the estimated result so that the quantity of light emitted by the light emission device becomes constant.

Abstract: A method for constructing and reconstructing a hologram. The hologram is constructed by irradiating two construction beams having different incidence angles onto a hologram record medium to form interference fringe patterns therein. The hologram is reconstructed by irradiating a reconstruction beam onto the interference fringe patterns so as to diffract the reconstruction beam in accordance with the interference fringe patterns. At least one of the two construction beams irradiates the hologram record medium through at least one optical deviation element. The incidence angle of the reconstruction beam is different from that of each construction beam and is arranged to be nearly a Bragg angle at any point of the hologram.

Abstract: A hologram scanner includes a laser source, a rotary body having a rotational axis at least one hologram facet arranged on the rotary body for diffracting a laser beam from the laser source to scan an object and receive the scattered light from the object for detection thereof, a motor means for driving the rotary body, and an optical detector for detecting the scattered light received and diffracted by the hologram facet. The hologram facet is inclined with respect to the rotational axis of the rotary body.

Abstract: A beam scanning-type information readout device, and more particularly, a hand-carried beam scanning-type information readout device which can read information consisting of a bar-code-symbol applied to a product and which is low in cost, simply operated and very useful and has high readout accuracy. The beam scan type information readout device comprises a laser beam generator, an optical beam scanner which deflects and scans plural beams generated from the laser beam generator or deflects and scans a beam generated from the laser beam generator in plural directions, an optical beam detector which detects the beam reflected from the bar-code-symbol, and a case which functionally and physically accommodates the above-identified elements and also provides a grip portion for the operator.

Abstract: Disclosed is a photoconductive recording element having a high photosensitivity over the entire band of visible rays which comprises an electroconductive substrate and a photoconductive layer formed on the substrate. The photoconductive layer comprises an acid dye and a basic dye both of which may be concurrently adsorbed on the outer surfaces of fine zinc oxide particles, or the acid dye of which is adsorbed on the outer surfaces of the zinc oxide particles and the basic dye of which is adsorbed on each layer of the acid dye.