Sony Corporation

Masami Himuro

Susumu Nishigaki

Yoshimi Makino

Koichi Takeuchi

Ko Ishimoto

Kanji Murano

Toshiro Yamada

Norio Itoh

Yoshihisa Watanabe

Seisuke Ohba

Kuniyoshi Koyama

Kouichi Takeuchi

Kazuhiko Terunuma

A lens unit and a camera capable of achieving stereoscopic television function and zoom function at the same time. More specifically, a lens unit () and a camera () each including at least a zoom lens (), light quantity adjusting device (or), an electronic optical shutter provided on a stage of the zoom lens (), and an optical shutter driving portion for controlling the electronic optical shutter () to open (A,B) in a predetermined pattern.

Stereoscopic zoom lens with shutter arranged between first and second lens groups

An electro-optic light shutter is disclosed which includes a ceramic body having electro-optic effect and a pair of electrodes applying A.C. voltage to the ceramic body to cause electro-optic effect, wherein the ceramic body is formed of PLZT ceramics having memory effect at a room temperature and loses the memory effect at an elevated operating temperature caused by application of A.C. voltage to the ceramic body.

Electro-optic light shutter

A color image reproducing apparatus having particular utility as a color view finder for a color image pick-up apparatus includes a black and white cathode ray tube for producing a black and white image in response to red, green and blue primary color control signals sequentially supplied thereto; a color filter including red, green and blue horizontal color filter stripes adapted to transmit light of a red, green and blue color, respectively, and arranged vertically in the order of green, blue, red, green, red, blue and green stripes; and electronic shutter for sequentially permitting the transmission of light from the black and white image through the red, green and blue color filter stripes, corresponding to the supply of the red, green and blue primary color control signals to the cathode ray tube, to form a composite color image at a predetermined position; and an objective lens for projecting the black and white image transmitted through the electronic shutter and the color filter stripes to the predetermined position.

Color image reproducing apparatus

A pick-up device for reading out information which has been recorded on a magnetic medium. The device comprises a substrate and a layer of soft magnetic material overlying a surface of the substrate, the easy axis or direction of magnetization being normal to the surface and the magnetic material having properties capable of having magnetic bubble domains generated and propagated therein, so that when the pick-up device is used to read out information from a magnetic medium, patterns of magnetic domains are formed in the layer of magnetic material corresponding to the patterns of the recorded information. Although the magnetic material is of the type capable of having magnetic bubble domains generated and propagated therein, there is no need to provide the usual bias field for maintaining the bubble domains or for providing domain-transport or domain-annihilating fields. In one use of the pick-up device, light is transmitted through the substrate and through the layer of magnetic material to be reflected from a layer of light-reflective material back through the magnetic material and the substrate, whereby the polarization of the reflected light is rotated, relative to the polarization of the transmitted light, by an amount determined by the patterns of magnetic domains formed in the layer of magnetic material. Hence, the recorded information can be optically read from the magnetic medium. In another use of this device, a magnetoresistive head is disposed on the substrate, the resistance of this magnetoresistive head being varied as a function of the patterns of magnetic domains formed in the layer of magnetic material.

Pick-up device for magnetically recorded information and method and

A color image projecting apparatus having three cathode ray tubes which produce different respective color images and including two projecting lenses. A first primary color image reproduced on a first cathode ray tube is projected on a screen through a first projecting lens, and second and third primary color images reproduced on second and third cathode ray tubes, respectively, are synthesized by a dichroic mirror and then projected on the screen through a second projecting lens. In this case, the projecting axes of the first and second projecting lenses are arranged to converge two images passed therethrough on the screen.

Growing community of inventors

Tokyo, Japan

Masami Himuro