Victor Company of Japan, Limited

Hiromichi Tai

Itsuo Takanashi

Shintaro Nakagaki

Tsutou Asakura

Masato Furuya

Hirohiko Shinonaga

Takashi Yamamura

Toshikatsu Ichitou

Tetsuji Suzuki

Hiroki Kitamura

Toshikatsu Ichito

A system for recording and reproducing a charge latent image in a recording medium has a transparent electrode (3), a photoconductive layer (4) on the electrode (3), a dielectric layer (8), a photoconductor layer (4) and a charge transfer suppressive layer (16). The system also includes a biasing element including a pair of electrodes (3, 19), a power source (10) for applying an electric field between the pair of electrodes, and an optical system (1) for directing an electro-magnetic radiation beam from an object (0) thereby forming an image thereof in the photoconductive layer (4). The reproducing system has a generating element (45, 48) for projecting the radiation beam toward the recording medium (41a, 41b), an element (20) for modulating the radiation beam, a first conversion element (55, 56) for converting the electro-magnetic radiation beam directed out of the path, an element (49a, 49b) for projecting the intensity modulated beam to an object, a second conversion element (57, 58) for converting the intensity modulated beam into an electrical signal, and an element (54) for directing the intensity modulated beam to the projecting element and the second conversion element.

System and medium for recording/reproducing charge latent image

A voltage is electrostatically induced at a sensing device in correspondence with a surface potential of a measured object. In the case where the sensing device uses a field effect transistor in transferring detected information, there are some factors decreasing the accuracy of detection. Various new arrangements prevent such decreases in the accuracy of detection. In the case of the surface potential of the measured object corresponds to an optical image, new arrangements ensure accurate detection of the optical image. In some cases, color component signals are obtained on the basis of a detection signal.

Apparatus for recording a charge latent image on a medium and for

Apparatus detecting distribution of surface potential on a medium

A charge latent image recording medium includes an electrode, a dielectric member, a member suppressing a transfer of charges, and a photoconductive member laminated in the order without any gaps therebetween. A system for reading a charge latent image recorded in a recording member includes means for projecting a first electromagnetic radiation beam along a path extending to the recording member, means projecting a second electromagnetic radiation beam approximately along the path for reading the charge latent image, guiding means disposed in the path changing electric resistance thereof along the path threthrough, in response to the first electromagnetic radiation beam projected thereto, for guiding an electric field of charges of the charge latent iamge.

Charge latent image recording medium and charge latent image reading out

An electric charge recording/reproducing apparatus for focusing an electromagnetic radiation ray containing a recording object information signal onto a photoconductive layer member (PCL) in an electric charge image recording medium (D) comprising a laminate of at least an electric charge retention layer, member (CHL), photoconductive layer member (PCL) and a first electrode (E) using an objective lens (318) which is driven and displaced in an optical axis direction by an actuator (ACT) of an automatic focusing system; and to integratedly connect and fix a moving electrode (Em) onto the objective lens (318), the moving electrode (Em) being intended to generate an electric field for positioning the electric charge image recording medium (D) in the electric field of a predetermined electric field intensity, towards the electrode in, the electric charge image recording medium (D). The electric charge image recording medium (D) composed of a laminate of at least a first electrode (E), a photoconductive layer member (PCL), an optical modulation layer member (PML) and an electric charge retention layer member (CHL), the electric charge recording medium comprising said electric charge retention layer member (CHL) provided with an electric charge image pattern for tracking control recorded and formed.

Electric charge image recording medium and recording/reproducing

A charge latent image is formed on a recording medium in response to information and a reference pattern so that the information and the reference pattern are recorded on the recording medium. During a reproducing process, the information is read out from the recording medium and an information signal representing the readout information is generated. In addition, the reference pattern is read out from the recording medium and a reference signal representing the reference pattern is generated. The information is demodulated from the information signal. The reference signal is used in the demodulation of the information from the information signal.

Compensating structure for position errors in apparatus for recording

A image pickup device having a rewritable recording member on which optical patterns are repeatedly recorded as electrostatic images using a writing head with an electric potential applied between the head and recording member. Each image recorded on the recording member is erased prior to recording a subsequent image by application of an alternating voltage or an electric potential of opposite polarity between the writing head and recording member.

Method and apparatus for repeatedly recording optical image information

An output apparatus for printing a proof sheet and making a planographic printing plate, comprising a printing image data generating means for producing the digital data of a plurality of different color images corresponding to a predetermined number of colors obtained by the color separation of the image data of an original to be printed; a proof sheet outputting means for sequentially forming a screened dot image of each color by using each color toner based on the printing image data derived from said printing image generating means; a planographic printing plate output means for forming a screened dot image of each color by using one recording medium for each color and the oil affinitive toner of each color based on the digital data of each color generated by said printing image data generating means. By providing further a means for compensating for the difference in characteristics between the printing of a proof sheet and the planographic printing (actual printing), one output apparatus can output both the data for printing a proof sheet and the data of the actual printing (the planographic printing).

Output device for proof and planograph using electrophotographic

Apparatus for detecting distribution of electric surface potential

A charge recording and reproducing device is constituted by a transfer device which transfers a film shaped recording medium from one to other side, a recording head adapted to form an electrostatic latent image from an image formed on the recording medium, an eraser for erasing the electrostatic latent image, a developing apparatus for developing the electrostatic latent image, and a reading device for reading the developed image.

Image pick-up apparatus

An apparatus for reading out a charge latent image from a recording medium includes a photo-modulation member exposed to an electric field from the recording medium and exposed to reading light. The photo-modulation member varies a condition of the reading light in accordance with the electric field. A photoconductive member is disposed between the recording medium and the photo-modulation member. Control light is applied to the photoconductive member. The control light has an intensity which varies with respect to time.

Apparatus for reading out a charge latent image

An apparatus for detecting a distribution of a surface potential on a measured object comprises a reading head opposing the measured object. The reading head includes an optical modulator subjected to an electric field representative of the surface potential distribution. The electric field applied to the optical modulator is varied in an alternating manner.

Apparatus for detecting surface potential distribution

In a control system for an information recording laser beam, an intensity of a laser beam is varied in a predetermined variation pattern during each of sequential one-pixel periods. The laser beam is periodically activated and deactivated in synchronism with a change of the one-pixel periods. A duration of the activating the laser beam within each of the one-pixel periods is controlled in accordance with a density of each of pixels of an image to be recorded.

Control system for information recording laser beam

Apparatus for recording and reproducing charge latent image

An image pickup apparatus comprising a circuit for forming an electric charge image corresponding to an optical image of an object to be image-picked up in a photo-photo conversion element constructed of two transparent electrodes with at least a photoconductive layer and a photo-modulation layer being interposed therebetween, by applying a light from the object to the photoconductive layer, a circuit for reading the electric charge image corresponding to the optical image of the object as optical information, by applying a reading light to the photo-modulation layer, means for erasing the electric charge image corresponding to the optical image of the object, wherein an erase operation and read operation are intermittently repeated for the electric charge image, and the reading means operating in a limited period which is substantially short compared to a period in which the forming means operate. In a similar image pickup apparatus the reading means operate only in a period in which the light incident to the photo-photo conversion element is intercepted by the optical shutter. A further apparatus comprising a circuit for transferring the electrical charge image formed in the first photo-photo conversion element to a second photo-photo conversion element during a period substantially shorter than the writing period by reading and writing the electrical charge image, optically at a time, from the first to second photo-photo conversion elements respectively, and a circuit for reading optical image information of an optical image supplied to the second photo-photo conversion element by applying a reading light to the reading light input side of the second photo-photo conversion element.

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Yokosuka, Japan

Hiromichi Tai