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公开(公告)号：JP2002243912A
公开(公告)日：2002-08-28
申请号：JP2001037366
申请日：2001-02-14
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , WATANABE SATORU
Abstract: PROBLEM TO BE SOLVED: To provide a lens and a combination lens which can be accurately adjusted by restraining the deviation in the alignment of the optical axes of lenses caused when the lenses are combined, and a manufacturing method for the combination lens, an optical pickup device and an optical disk device on each of which the combination lens is mounted. SOLUTION: The combination lens is constituted by sticking a 1st lens L1 obtained by making a surface on either the light incident side or the light emitting side of lens base substance 1 plane and having the other surface parallel with the plane surface as a component element, and a 2nd lens L2 obtained by making a surface on either the light incident side or the light emitting side of lens base substance 2 plane and having the other surface parallel with the plane surface as a component element. The combination lens is applied for each of the optical pickup device and the optical disk device as an objective lens.
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公开(公告)号：JP2002208160A
公开(公告)日：2002-07-26
申请号：JP2001005764
申请日：2001-01-12
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , KAWASE KIMITAKA
IPC: G11B11/105 , G11B7/135
Abstract: PROBLEM TO BE SOLVED: To provide a magneto-optical unit which writes data into a magneto-optical disk at high speed. SOLUTION: A magnetic field is generated over a plurality of tracks of the magneto- optical disk 1 by a magnetic head 5. An optical distribution controller 15 controls a direction of a magnetic field depending on a data writing polarity and drives the magnetic head 5 for a period in accordance with the length of data to be written. A semiconductor laser 8 is blinked on and off in accordance with a pattern of writing data by a data writing modulation means 17. An optical distributor 14 is controlled in accordance with the track of the data written into the magneto-optical disk 1 by the optical distribution controller 15, and incident light beams from the semiconductor laser 8 are formed into the light beams 91-95 with which a plurality of tracks are continuously irradiated. A plurality of tracks in the area of the magneto-optical disk 1 on which the magnetic field of the magnetic head 5 exerts are successively irradiated with the light beams 91-95 via an object lens 6. The data are continuously written into a plurality of tracks by continuous irradiation with the light beams 91-95. The optical distributor 14 is composed of, for example, a lithium niobate substrate having a periodic polarization reversing structure.
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公开(公告)号：JP2002006116A
公开(公告)日：2002-01-09
申请号：JP2000189730
申请日：2000-06-20
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , KOCHIYAMA AKIRA
Abstract: PROBLEM TO BE SOLVED: To provide an optical element with a downsized convex lens having a large numerical aperture. SOLUTION: The optical element 100 includes the convex lens 102 having a convex curved surface 102C formed and a base material 101 adhering to the convex curved surface 102C of the convex lens 102. The base material 101 includes a first surface 100B and a second surface 100U opposed to each other. A concave curved surface 101C adhering to the convex curved surface 102C is formed on the first surface 100B, and a hole 103 is formed from the far side of the concave curved surface 101C to the second surface 100U. The center section of the convex curved surface 102C of the convex lens 102 is exposed in the hole 103 of the base material 101. For example, the convex lens 102 is formed by filling an optical material into the concave part of the base substrate 101, and then the hole 103 is formed in the base material 101 where the convex lens 102 is formed, thus the optical element 100 can be produced. The convex lens 102 of the optical element 100 can be downsized by making smaller the concave part of the base material 101 where the optical material is filled.
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公开(公告)号：JP2002006115A
公开(公告)日：2002-01-09
申请号：JP2000189729
申请日：2000-06-20
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , WATANABE SATORU
Abstract: PROBLEM TO BE SOLVED: To provide a small-sized optical element having a large numerical aperture. SOLUTION: The optical element 100 includes a base substrate 101 made of a first optical material, and a second optical material having a different refractive index from that of the first optical material. The base substrate 101 includes a first surface 100B and a second surface 100U opposed to each other. A first recessed part 101B having a rotational symmetry is formed on the first surface 100B, and a second recessed part 101D having a rotational symmetry is formed on the second surface 100U. The recessed parts 101B, 101D are filled with the second optical material so as to compose lenses 102, 103. For example, the first optical material is quartz, and the second optical material is silicon nitride (SiN) or gallium phosphide(GaP). The optical element 100 can be downsized and also the lenses 102, 103 can be made smaller by making smaller the recessed parts 101B, 101D.
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公开(公告)号：JPH10333189A
公开(公告)日：1998-12-18
申请号：JP14234897
申请日：1997-05-30
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO
IPC: G02F1/29
Abstract: PROBLEM TO BE SOLVED: To obtain a focal distance variable lens device capable of varying a focal distance without accompanying the mechanical movement of a lens by providing electrodes being opposite to each other on both main surfaces of a ferroelectric substrate and applying a voltage to the electrodes making a pair so as to vary the focal distance by varying the voltage and also, to obtain the device capable of converging or dispersing light beams in the direction vertical to the main surface in the case that the light beams are made incident on the ferroelectric substrate. SOLUTION: A device is provided with a ferroelectric substrate 1A, electrodes 73 and 74 making a pair installed respectively on the both main surfaces 43A, 44A of the substrate being opposite to each other, a voltage supply source 77 for applying a voltage to between the electrodes making a pair and then, the focal distance against the converged or dispersed light beams in varied by converging or dispersing the light beams made incident on one end face of the substrate and emitted from the other end face after passing between both main surfaces and also by varying the voltage of the voltage supply source.
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Patent Agency Ranking
公开(公告)号：JPH08220576A
公开(公告)日：1996-08-30
申请号：JP2656195
申请日：1995-02-15
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , OGAWA TAKESHI , NADA NAOJI
Abstract: PURPOSE: To make coincident the oscillation wavelength of a semiconductor laser element and the phase matching wavelength of an SHG element easily in a simple structure, without carrying out a strict temperature control, by generating a higher harmonics in a wavelength scope wider than a wavelength scope which can be resonated by a resonant means. CONSTITUTION: In an SHG element 2 as a high-order higher harmonics generating element, the width and/or the depth of a set light waveguide passage are being changed along the propagating direction of the light wave, or the cycle of the cyclic structure is being changed along the propagating direction of the light wave. As a result, the generative wavelength, width of the second higher harmonics laser beam generated from the SHG element 2 is expanded, and it can be set wider than the oscillating wavelength width of the fundamental harmonic laser beam outgone from a light amplifier 1. Consequently, regardless of the wavelength of the laser beam oscillated from the light amplifier 1, the second higher harmonics of the laser beam can be generated necessarily in the SHG element 2, and the oscillating wavelength of the semiconductor laser beam outgone from the light amplifier 1, and the phase matching wavelength of the SHG element 2 can be made coincident easily.
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公开(公告)号：JPH0777712A
公开(公告)日：1995-03-20
申请号：JP22608993
申请日：1993-09-10
Applicant: SONY CORP
Inventor： YAMAGUCHI KYOJI , YAMADA MASAHIRO
Abstract: PURPOSE:To obtain local polarization inversion regions with good controllability. CONSTITUTION:First electrodes 11 constituted of an electrical conductor having a width of less or equal half the local polarization inversion region width Wi to be designed are arranged on one surface 10a of surfaces 10a and 10b facing each other of a nonlinear optical material substrate 10 subjected to monopolarization. A second electrode 12 is arranged on another surface 10b opposite to the first electrodes 11. A voltage is impressed between the first electrodes 11 and the second electrode 12 to form the local polarization inversion regions.
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公开(公告)号：JPH0686123A
公开(公告)日：1994-03-25
申请号：JP26084292
申请日：1992-09-02
Applicant: SONY CORP
Inventor： YAMAMOTO TORU , OKANO RENJIROU , SAKAI KENZO , YAMADA MASAHIRO
Abstract: PURPOSE:To improve the job performance and to prevent a tangled cord or the like by implementing the connection of the illumination light in one touch by the slide type so as to simultaneously implement mechanical coupling and the electric connection. CONSTITUTION:A slide connection mount 2 is provided at the bottom of a video camera 1. The illumination light 3 used while being fitted removably to the connection mount 2 is made up of a light main body 4, a bracket 5 and a light section 6. One end of the bracket 5 is linked to the write main body 4 freely turnably and a position means at a prescribed position is provided and the bracket 5 when it is not in use is accommodated to the side face of the light main body 4 while being turned. The light section 6 is fitted to the other end of the bracket 5 so as to be connected mechanically and electronically.
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公开(公告)号：JPH0572587A
公开(公告)日：1993-03-26
申请号：JP23333391
申请日：1991-09-12
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , KIJIMA KOUICHIROU , KAWAKUBO SHIN , TAGUCHI AYUMI
Abstract: PURPOSE:To suppress the fluctuation by the basic wavelength and temp. of the second harmonic generator(SHG) and to stably obtain SHG light. CONSTITUTION:This generator has a waveguide type second harmonic generating element(SHG element) 2. The angle of Cerenkov radiation or grating radiation is detected by this element and a feedback is applied to the input light to this SHG element 2 or the SHG element 2 in such a manner that these angles are kept constant, by which the phase matching conditions of the SHG element 2 are kept nearly constant.
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公开(公告)号：JPH04341072A
公开(公告)日：1992-11-27
申请号：JP11351591
申请日：1991-05-17
Applicant: SONY CORP , ASAHI RES KK
Inventor： IWAZAWA JUNICHI , SASAKI YU , YAMADA MASAHIRO
IPC: G03B15/035 , G03B15/03 , H04N5/225
Abstract: PURPOSE:To make the lighting device small. CONSTITUTION:A lighting section 4 is fitted to a tip of a slide section 3 mounted to a main body 2 slidably. A latch section 47 of the slide section 3 is latched to a main body 2 when the device is not in use. The slide section 3 is energized upward by a helical spring 43. While a lock lever 31 is depressed when the device is in use, a lighting section ascending button 30 is pushed. Thus, the latch section 47 of the slide section 3 is pushed up by a tip 52 of the lighting section ascending button 30 to release the latch of the slide section 3. In this case, a projection 58 of the slide section 3 turns on a power switch 59 of the lighting section 4. When an automatic/manual changeover switch 60 is thrown to the position of AUTO, for example, as soon as the video recording of the video camera K is started, a halogen lamp 71 of the lighting section 4 is lighted. Since the device is made compact when the device is not in use, the device is easily handles and the lighting section is largely projected from the video camera main body to offer sufficient lighting when the device is in use.
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