公开(公告)号：JPH11110798A

公开(公告)日：1999-04-23

申请号：JP26997097

申请日：1997-10-02

Applicant: SONY CORP

Inventor： KATOU YOSHIMUNE

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To comparatively easily push a multilens holding an optical member into a slide base with light pressure, to exactly locate that multilens at a prescribed position and to accurately attach an optical member such as a Wollaston prism held by a multiholder at the intended position. SOLUTION: This device is provided with a slide base 20 supported so as to get closer to or away from a magneto-optical disk, Wollaston prism 56, with which laser light emitted from a semiconductor laser and radiated through an objective lens is reflected on the magneto-optical disk and the reflected light returned from the objective lens is passed, and multiholder 55 for holding this Wollaston prism 56. The multiholder 55 is provided with a pair of fixtures 81 and 81 protruded on both sides, and a pair of these fixtures 81 and 81 are attached onto the slide base 20 while being respectively fitted to a pair of fixing grooves 86 and 86 provided on the slide base 20.

公开(公告)号：JPH06162601A

公开(公告)日：1994-06-10

申请号：JP33806592

申请日：1992-11-25

Applicant: SONY CORP

Inventor： KATOU YOSHIMUNE

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To make a recording means detachable from the body of the apparatus and also lightweight and compact when used exclusively for reproduction of data. CONSTITUTION:When a lid 2 is opened, a macro switch 100 is kept OFF and an objective lens 11 of an optical pickup device 7 is urged by a spring to the innermost periphery of a magneto-optic disk 4. An overwrite head is also urged to the innermost periphery of the magneto-optic disk 4. An overwrite head 51 and the optical pickup device 7 are electrically and mechanically registered by a related part. When the lid 2 is closed, the macro switch 100 of the body 1 of the apparatus is turned on. In response to the ON signal, an optical block 10 is positioned at the innermost periphery of the disk 4. When the apparatus is used exclusively as a portable reproducing apparatus, the kit of the overwrite head 51 is removed from inside the lid 2. Accordingly, the apparatus becomes lightweight.

公开(公告)号：JPH05325250A

公开(公告)日：1993-12-10

申请号：JP15756192

申请日：1992-05-25

Applicant: SONY CORP

Inventor： KOBAYASHI YOSHIHEI ,  IWAASA SHIYOUJI ,  KATOU YOSHIMUNE ,  KASHIWAGI HIROSHI

IPC: G11B7/12 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To simplify assembling work and further to miniaturize the entire shape of an optical pickup itself as to the optical pickup for a magneto-optical disk recording and reproducing device. CONSTITUTION:An optical block 40 and an objective lens part 50 are separately formed, and optical parts are integrally held by an optical base 32 and an objective lens part base 44, respectively. They are held by setting one reference plane H3 of a specified holding member 42 as reference. Furthermore, a guide shaft is formed so that its moving direction may be perpendicular to the optical axis of a light beam L1 between a laser light source 10 and a beam splitter 16.

公开(公告)号：JPH11110775A

公开(公告)日：1999-04-23

申请号：JP26996897

申请日：1997-10-02

Applicant: SONY CORP

Inventor： KATOU YOSHIMUNE

IPC: G11B7/12

Abstract: PROBLEM TO BE SOLVED: To attain thinning and lightening of an entire optical pickup device. SOLUTION: This device is provided with a slide base 20 supported so as to get closer to and away from an optical disk and a grating 40 for forming a spot for tracking error signal detection interposed between an objective lens, which faces the optical disk, in an optical system arranged on this slide base 20 and a semiconductor laser for emitting laser light toward this objective lens. A grating holder 45 is attached to this grating 40, this grating holder 45 is provided with a V groove 45b arranged on one side of the grating 40 and an adjust arm 45a arranged on the other side, and the V groove 45b is supported so as to be turned by the slide base 20.

公开(公告)号：JPH09180202A

公开(公告)日：1997-07-11

申请号：JP35151395

申请日：1995-12-25

Applicant: SONY CORP

Inventor： TOMIYAMA TAKAMICHI ,  KATOU YOSHIMUNE ,  MOGI HIROMI ,  ISHIDA TOMOYUKI

IPC: G11B7/085

Abstract: PROBLEM TO BE SOLVED: To suppress generation of harmful abnormal sound. SOLUTION: This slide base 40 consists of an optical system forming an optical pickup and a frame body 42 supporting an objective lens actuator, and is configured so as to move these optical system and objective lens actuator along a guide shaft. And, the frame body 42 supports a first area 44 to support two or more optical elements forming the optical system and also has a second area 45 which holds the objective actuator driving an objective belonging to the above-mentioned optical system and of which shaft is connected with the first area, and further, with respect to the second area 45 at least, a bottom part 51 is formed to be integrated with the frame body.

公开(公告)号：JPH05334684A

公开(公告)日：1993-12-17

申请号：JP16224892

申请日：1992-05-28

Applicant: SONY CORP

Inventor： KATOU YOSHIMUNE

IPC: G11B7/08

Abstract: PURPOSE:To provide an optical pickup capable of simplifying skew adjusting work with simple constitution in the optical pickup of an optical disk recording and reproducing device. CONSTITUTION:The bottom of a skew base 44 is formed in circular arc shape. The bottom of the skew base 44 is held with an optical pickup base 42 in such a way that it can be rocked freely by abutting on a skew base abutting part 42A. The skew base 44 is held at a prescribed position in such state.

公开(公告)号：JPH11110784A

公开(公告)日：1999-04-23

申请号：JP27137297

申请日：1997-10-03

Applicant: SONY CORP

Inventor： KATOU YOSHIMUNE ,  NEMOTO HIROAKI

IPC: G11B7/125

Abstract: PROBLEM TO BE SOLVED: To reduce the thickness of an optical pick-up device and to miniaturize and make thin the device by burying a semifixed resistor for adjusting the laser power of an optical system in the thickness direction of a slide base. SOLUTION: A hole part 18 that is penetrated in a thickness direction is formed at a position away from the accommodation part of the optical system of a slide base 2, and a semifixed resistor 17 for adjusting the output of a semiconductor laser 8 is arranged while it is buried into the hole part 18. In this case, the upper surface side of the hole part 18 is covered with the extension part of a flexible printed wiring board 16 and the semifixed resistor 17 is fixed to an inner surface side part that opposes the hole part 18 of the flexible printed wiring board 16. Therefore, by inserting an adjustment tool from the lower surface side of the slide base 2 through the hole part 18 and rotating it, the semifixed resistor 17 can be adjusted. The adjustment is performed in a manufacturer's assembly process, thus adjusting the output of the semiconductor laser 8 to an optimum value.

公开(公告)号：JPH11110777A

公开(公告)日：1999-04-23

申请号：JP27136897

申请日：1997-10-03

Applicant: SONY CORP

Inventor： KATOU YOSHIMUNE ,  MIYATA TAKURO ,  NEMOTO HIROAKI

IPC: G11B7/12

Abstract: PROBLEM TO BE SOLVED: To minimize the position deviation and the generation of skew after the skew adjustment of an objective lens. SOLUTION: Rising face parts 78a and 74a are formed while being located on the working side of a lens holder 70 and mutually facing back and forth on an adjustment plate 78 of a biaxial supporter 79 for supporting the lens holder 70, with which an objective lens 47 is held, through a spring wire 80 so as to work that holder in the focus direction and tracking direction of the objective lens 47 and a yoke base 74 on the side of a substrate. Then, these rising face parts 78a and 74a are fixed by soldering (s) at the gap of the rising face parts 78a and 74a after the skew adjustment.

公开(公告)号：JPH10269618A

公开(公告)日：1998-10-09

申请号：JP7009297

申请日：1997-03-24

Applicant: SONY CORP

Inventor： KATOU YOSHIMUNE

IPC: G11B7/09 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To provide an optical pickup device high in rigidity, reduced in the span of the guide shafts, and capable of suppressing resonance and smoothening the movement in the tracking direction. SOLUTION: This device is provided with a mirror 5, which at least reflects the outgoing light beams of a semiconductor laser 2 and guides the beams to the direction of an optical recording medium 1, and a two axis actuator 6 which holds an objective lens 6a that converges the outgoing light beams of the laser 2 onto the medium 1 and has the electromagnetic means that controls and drives the lens 6a in the focusing and tracking directions of the medium 1. The actuator 6 is a moveable section 6c, that holds the lens 6a, is held by a pair of parallel springs 6b extended from a fixed section 6d. The optical axis of the outgoing light beams of the laser 2 is in the normal direction with respect to the tracking direction and the laser 2 is arranged in the section 6d side of the actuator 6.

公开(公告)号：JPH10124913A

公开(公告)日：1998-05-15

申请号：JP29734696

申请日：1996-10-18

Applicant: SONY CORP

Inventor： BABA TOMOHIKO ,  YAMAZAKI MASAISA ,  TOMIYAMA TAKAMICHI ,  KATOU YOSHIMUNE

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To eliminate the effect of the divergent angle of a light beam by providing the optical pickup with a light focusing means for converging the light beam emitted from a light source by an aperture and focusing this light onto the signal recording surface of an optical disk and forming this aperture to an elliptic shape having the optical axis of this light focusing means at its center. SOLUTION: The light beam from a semiconductor laser element 21 is cast via respective optical elements 22 to 25 to the optical disk, is converged by the aperture 26a and is focused to the signal recording surface of the optical disk by an objective lens 26. The return light beam thereof is detected by a photodetector 29 via the respective optical elements and recording signals are reproduced. The aperture 26a formed to the elliptic shape converges the light beam by the minor diameter and major diameter with respect to the directions A and B of the small and large divergent angles of the light beam. Then, a uniform light intensity distribution is obtd. together with respect to the directions A, B. As a result, good reading performance is obtd. and the output coupling efficiency of the semiconductor laser element 21 is improved.