Sony Corporation

Kantatsu Co., Ltd.

Kazutaka Noborimoto

Takashi Fukushima

Kazuhito Kurita

Junichi Suzuki

Kenji Shintani

Kunio Nakazato

Norikatsu Inoue

Yuhei Kobayashi

Keiji Maruta

Eiji Oshima

Norimasa Matsuo

Toshiyuki Kase

An object of this invention to perform positioning between the obverse surface and the reverse surface of a sheet and shape a pattern on each of the two surfaces of the sheet. A pattern manufacturing apparatus includes a shaping base, a light beam irradiation window, an optical engine, a lifting head, a head feed mechanism, and a stepping motor. A pattern forming sheet is a sheet in which an admixture containing a conductive material and a photo-curing resin is applied to both of the obverse surface and the reverse surface. The pattern forming sheet is provided with at least one positioning reference hole.

Pattern forming sheet, pattern manufacturing apparatus, and pattern manufacturing method

The present invention is capable of selectively reproducing an information signal from an optical disk with any of a plurality of types having different track pitches of recording tracks, that is, capable of selectively reproducing an information signal from an optical disk having a low or high recording density by determining the type of the optical disk, that is, determining whether a mounted optical disk is a low-recording-density optical disk or a high-recording-density optical disk. The present invention deliberately generates aberration in an optical beam by controlling a voltage applied to a liquid-crystal device in order to vary the diameter of the optical beam in accordance with the determined type of the optical disk. The present invention is thus characterized in that it is applicable to an optical pickup apparatus for changing the diameter of an optical beam in accordance with whether a mounted optical disk is a low-recording-density optical disk or a high-recording-density optical disk, as well as applicable to an optical-disk reproducing apparatus and an optical-disk recording & reproducing apparatus that employ the optical pickup apparatus.

Optical-disk reproducing apparatus, optical pickup apparatus and optical-disk recording and reproducing apparatus

The present invention provides a recording and/or reproducing apparatus using a magneto-optical disc () as a recording medium, which includes a recording and/or reproducing mechanism () for recording and reproducing information signals to and from the magneto-optical disc () rotatably housed in a disc cartridge (), a support base () which supports the recording and/or reproducing mechanism (), and a impact drive mechanism () which causes the electromechanical-transduction element () to lengthen and shorten corresponding to driving pulses to shift the drive shaft () along the shaft direction thereof so as to cause the movable portion () to slide along the shaft direction of the drive shaft () together with the support base (), and the recording and/or reproducing mechanism () and the impact drive mechanism () are arranged within a projection area of the openings (), () of the disc cartridge () for exposing a part of the magneto-optical disc () to the outside from the inner to the outer circumference thereof

Recording and/or reproducing device

A position detecting apparatus comprising a magnet secured to a movable body (lens holder) which is movable along a shaft body when the shaft body is inserted, the magnet having polarity which is alternately magnetized at a predetermined interval, and a magneto-resistance effect element which is positioned and fixed so as to be confronted to the magnet at a predetermined gap interval by an MR holder with the shaft body being used as a securing position reference, and the magneto-resistance effect element serving to obtain a position detection signal for the movable body through variation of a resistance value thereof which is caused by magnetic field of the magnet through movement of the movable body.

Position detecting apparatus using magneto-resistance effect element

A device for supporting and positioning the objective lens in an optical reading apparatus, such as, a video disc player, comprises a first pair of parallel leaf springs attached at one end thereof to a fixed support member for motion parallel to a record medium surface. A movable frame is attached to the other ends of the first springs, and a second pair of leaf springs movable perpendicularly to the record medium surface extend from the frame, the second springs being generally parallel to and between the first pair but with their faces perpendicular to those of the first pair. The objective lens is mounted at the free ends of the second pair of springs, and is movable electromagnetically in orthogonally related directions by means of coils and magnets associated with the objective lens and with the frame.

Growing community of inventors

Kanagawa, Japan

Kazutaka Noborimoto