Sony Corporation

Chiyoda Corporation

Ayase Co., Ltd.

Chiaki Kojima

Hiroshi Ohki

Tadashi Taniguchi

Takashi Otobe

Kayoko Hasegawa

Yuzuru Yanagisawa

Hiroji Kawai

Yoshifumi Mori

Kazuo Honda

Noriyuki Yoneda

Munekazu Nakamura

Kiyoshi Tanaka

Hidetoshi Shimizu

Kunio Kaneko

Kosuke Miyahara

Hidehiko Kudoh

Ja Koo

Kousuke Miyahara

Norio Iwamoto

Hiroyuki Imai

Hideto Ishikawa

An object of the invention is to provide a laser line-generator that generates a straight line with the both end portions as bright as the central portion, and a laser line-generator module that integrates the laser line-generator with a laser light source. A columnar transparent medium has an entrance boundary surfacefor taking in laser light and an exit surfacefor emitting the taken laser light linearly. At least one of the entrance boundary surfaceand the exit surfaceis composed of a curved surface, and a curve forming the curved surface includes two or more inflection points F.

Laser line-generator and laser line-generator module

An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LCand LCthat are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LCand LCare incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

Optical pickup device with a plurality of laser couplers

An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC and LC that are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LC and LC are incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC1 and LC2 that are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LC1 and LC2 are incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

For the sake of reducing the number of parts and simplifying adjustment for the optical positions of the parts in an optical device wherein information signals from the light scattered or diffracted which is derived from an optical recording medium are detected, there is provided the optical device of the invention comprising a semiconductor substrate provided with a plane light emitting laser element and a photodiode; and an optical system; a layout position of the photodiode being selected in a region which extends out of the confocal region of the optical system, and from which the light scattered or diffracted from a section irradiated with laser light irradiation derived from the plane light emitting laser element with respect to the section to be irradiated.

Optical device comprising a photodetector for detecting light scattered

A laser light detect/emit package 3 and a biaxial drive portion 5 for driving the objective lens 4 are supported on a wiring board 1 having wiring patterns 2a and 2b to electrically connect them to the wiring patterns 2a and 2b. Packaged in the laser light detect/emit package 3 are a laser coupler 11 having an optical prism 15 and a laser chip 16 formed on a photo diode IC 14 including photo diodes 12 and 13 for detecting optical signals. In lieu of the laser light detect/emit package 3, an auxiliary wiring board supporting the laser coupler 11 may be inserted and held in a recess formed in the wiring board 1.

Optical pickup device with biaxial drive for objective lens

To reduce the size, the weight, and the production cost and to improve the reliability of an optical device for a code reader for reading a code (24) imprinted on the package of an article, a light emitting element (21), a prism (22) and a light receiving element (15) are all fixed to a semiconductor substrate (14), so that the assembly at the semiconductor chip level of these elements (15, 21 and 22) is possible. This device can be used for an optical apparatus for reading various codes used in POS systems, physical distribution/management systems, production control systems, and so forth.

Semiconductor optical device for code reader

In an optical apparatus according to the present invention, a light-absorbing film is formed between a light-receiving element and an optical semitransparent film formed on the light-receiving element to cause the light-receiving element to partially receive incident light. In addition, in an optomagnetic recording polarization optical apparatus according to the present invention, a prism for guiding a reflected light component from an optomagnetic recording medium to a light-receiving element and the light-receiving element are arranged on the same substrate.

Opto-magnetic recording polarization optical apparatus having a light

Opto-magnetic recording polarization optical apparatus including a laser

A method and apparatus for the combustion treatment of a toxic gas which forms microparticles by combustion are disclosed wherein the toxic gas is subjected to a combustion treatment in a specific combustion furnace where the combustion gas formed is brought into contact with an aqueous film flowing downwards on the inner wall of the furnace from the upper end portion thereof to the lower end portion thereof or with a cooled surface, and then optionally with aqueous droplets dispersed in the interior space of the furnace. The water captures the microparticles formed by combustion of the toxic gas and is discharged out of the furnace as a mixed flow with the combustion gas thus treated, and optionally the mixed flow is successively treated in a gas-liquid separator.

Method for the combustion treatment of toxic gas-containing waste gas

There is disclosed herein a hologram recording medium comprising of substrate formed of transparent and non-light scattering material having a plurality of open pores for said substrate and photopolymerization composition impregnated in said open pores. The photopolymerization composition consists essentially of a photopolymerizable monomer or oligomer which adheres to the surface of said open pores, a photopolymerization initiator and activator for controlling the photopolymerization speed.

Hologram recording medium

Method of producing inline hologram lens

An optical reproducing head for reproducing an information signal recorded on an optical record medium includes a semiconductor laser for generating a laser beam, a first off-axis hologram lens irradiated with the laser beam from the semiconductor laser to produce a beam of parallel rays of light that has an optical axis which is off-set with respect to the optical axis of the laser beam, a second off-axis hologram lens irradiated with the beam of parallel rays of light from the first off-axis hologram lens to generate a focused beam which has an optical axis which is off-set with respect to the optical axis of the beam of parallel rays of light and has an optical axis perpendicular to the optical record medium, and a photo-detector detecting the intensity of a non-diffracted wave beam from the first off-axis hologram lens means, the non-diffracted wave beam being at least part of the focused beam which has been reflected from the optical record medium and has been diffracted by the second off-axis hologram lens. The output of the photodetector is used to produce a focus error signal and a tracking error signal for controlling the focus servo and tracking servo operations.

Growing community of inventors

Kanagawa, Japan

Chiaki Kojima