-
公开(公告)号：JP2003067966A
公开(公告)日：2003-03-07
申请号：JP2001272388
申请日：2001-09-07
Inventor： YAMAMOTO KENJI , OSATO KIYOSHI , KATO YOSHIAKI
CPC classification number: G11B7/13927 , G02F1/133553 , G02F2203/50 , G11B7/0948 , G11B7/0956 , G11B7/1369 , G11B2007/0013
Abstract: PROBLEM TO BE SOLVED: To correct the wave surface aberration caused by various errors when manufacturing an optical element, while suppressing the loss of light from the light source as much as possible, and correct especially the aberration due to thickness errors, slope errors of an optical recording medium.
SOLUTION: This liquid crystal element 3 has a light source 1, an objective lens 2 to condense the light flux from the light source 1 to irradiate the signal recording surface 101a of an optical recording medium 101, and a liquid crystal element 3 which has a front and a rear flat surface and is disposed in an optical path between the light sources 1, and the objective lens 2 to give a predetermined phase distribution to the transmitted light. It is built by sandwiching a liquid crystal molecule layer with a pair of transparent base plates whose sides facing the liquid crystal molecule layer are formed making the thickness distribution of the liquid crystal molecule layer similar to the phase distribution caused by the predetermined aberration.
COPYRIGHT: (C)2003,JPOAbstract translation: 要解决的问题：为了校正在制造光学元件时由各种误差引起的波面像差，同时尽可能地抑制来自光源的光的损失，并且特别地校正由于厚度误差引起的像差，斜率误差 光记录介质。 解决方案：该液晶元件3具有光源1，物镜2，用于冷凝来自光源1的光束，以照射光记录介质101的信号记录表面101a;以及液晶元件3，其具有 前平面和后平面，并且设置在光源1和物镜2之间的光路中，以对透射光给出预定的相位分布。 通过将液晶分子层夹在一起形成面对液晶分子层的一侧的透明基板构成，使得液晶分子层的厚度分布与由预定像差引起的相位分布相似。
-
公开(公告)号：JP2002208169A
公开(公告)日：2002-07-26
申请号：JP2001005784
申请日：2001-01-12
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , OSATO KIYOSHI
IPC: G11B7/135
Abstract: PROBLEM TO BE SOLVED: To provide an electro-optic element suitably adaptable to an optical pickup or the like for the purpose of reducing power consumption and shortening seek time. SOLUTION: An optical switch 3 using a ferroelectric substrate electrooptically switches light beams entering on a plurality of objective lenses that are mounted on an optical pickup and on a plurality of optical heads. Further, a light deflector 9, installed between the optical switch 3 and the objective lens 2, electrooptically changes the direction of a light beam, which is outputted from the optical switch 3 and directed to the objective lens, and performs a tracking operation. Such optical switch 3 and the light deflector 9 carry out these operations in accordance with a periodic polarization reversing structure formed in the ferroelectric substrate and with a voltage applied to the electrode arranged at least on two surfaces of the substrate.
-
公开(公告)号：JP2001084642A
公开(公告)日：2001-03-30
申请号：JP2000203967
申请日：2000-07-05
Applicant: SONY CORP
Inventor： KIJIMA KOICHIRO , ICHIMURA ISAO , SAITO KIMIHIRO , OSATO KIYOSHI
IPC: G11B7/24 , G11B7/243 , G11B7/26 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To provide an optical recording medium capable of recording and reproducing due to a near-field optical system by forming the optical recording medium improved in surface flatness. SOLUTION: Concerning the optical recording medium for performing at least one of recording and reproducing of information by radiating light, this recording medium has a substrate 1 formed with fine ruggedness 2 on the surface of a side to be irradiated with light, a formed film layer having a recording layer at least on this substrate 1 and a finely rugged surface reflected with fine ruggedness and a light transparent flattened film 4, which is irradiated to this optical information recording medium, of single or multiple layers formed by embedding the finely rugged surface on this formed film layer while having transmissivity of radiated light and having hardness, to which surface grinding is applied, capable of grinding.
-
44.发明专利
公开(公告)号：JP2001023252A
公开(公告)日：2001-01-26
申请号：JP19653099
申请日：1999-07-09
Applicant: SONY CORP
Inventor： KIJIMA KOICHIRO , ICHIMURA ISAO , KURODA YUJI , OSATO KIYOSHI , YAMAMOTO KENJI
Abstract: PROBLEM TO BE SOLVED: To easily manufacture a master disk and to accurately control an operating distance by providing a conductive film over a whole region to be exposed, which is transparent which respect to light having a wavelength equal to the wavelength which an exposing luminous flux has. SOLUTION: The device for manufacturing a master disk has an optical means consisting of a condenser lens 2 which converges a laser beam L projected from a light source to irradiate a layer 101 of a photosensitive resist applied on an optical master disk base material 51 attached to a disk rotary driving device of the device for manufacturing a master disk and a solid immersion lens(SIL) 3 which is an objective lens interposed between the optical master disk base material 51 and the condenser lens 2. A conductive film 102 formed on the side of the optical master disk base material 51 does not generate reflected light even when a laser beam is focused on the photosensitive resist layer 101 and brings recorded data capacity of higher density comparing with the case using an optical master disk forming a conductive film having metal reflection.
-
公开(公告)号：JP2001023219A
公开(公告)日：2001-01-26
申请号：JP19503799
申请日：1999-07-08
Applicant: SONY CORP
Inventor： KIJIMA KOICHIRO , ICHIMURA ISAO , KURODA YUJI , OSATO KIYOSHI , YAMAMOTO KENJI
IPC: G11B7/135
Abstract: PROBLEM TO BE SOLVED: To prevent the transmission of heat from an objective lens to an optical disk when the objective lens is disposed in a region near the optical disk. SOLUTION: For a solid immersion lens 1, its spherical surface part is set as an incident surface 1a1, on which a laser light L is made incident, and its flat surface part is set as an opposite surface 1b for emitting the laser light L made incident from the incident surface 1a1 toward an optical disk 100, placed opposite to the optical disk 100. This solid immersion lens 1 is disposed by setting a distance between the opposite surface 1b1 and the optical disk 100, equal to 200 nm or lower, having at least a part including the opposite surface 1b1 made of a high heat conductive material, and formed in a dual structure.
-
Patent Agency Ranking
公开(公告)号：JP2000173078A
公开(公告)日：2000-06-23
申请号：JP34206298
申请日：1998-12-01
Applicant: SONY CORP
Inventor： KOCHIYAMA AKIRA , KIJIMA KOICHIRO , OSATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a floating type optical element to be used in an optical pickup or the like in which damage at the air lubricating surface and front edge of the slider may be reduced and damage at the boundary between the optical lens and slider may also be reduced. SOLUTION: There is provided a floating type optical element 25, comprising, in regard to an optical focusing means consisting of at least one optical lens 23, 23 to focus the optical beam from the light source 22 to the signal recording surface of an optical disc, an optical lens 22 which is the nearest to the optical disc and a slider 24 for holding a constant floating amount for the surface of the optical disc 11 with the air lubricating surface 24a in view of keeping the optical lens in the optical contact condition for the surface of the optical disc. This optical lens 22 is arranged within a through hole 26 formed in the direction orthogonal to the air lubricating surface for the slider.
-
47.发明专利
公开(公告)号：JPH11250402A
公开(公告)日：1999-09-17
申请号：JP4817698
申请日：1998-02-27
Applicant: SONY CORP
Inventor： KIJIMA KOUICHIROU , KOCHIYAMA AKIRA , OSATO KIYOSHI
IPC: G11B11/10 , G11B5/02 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic field generator and a magneto-optical disk device arranged close to an optical disk and capable of effectively utilizing a magnetic field even when the magnetic field generator is arranged on the side of an optical pickup. SOLUTION: The magnetic field generator includes a circular substrate 21 provided with a hole 21a on its center, a coil 22 constituted of a conductive pattern formed around the hole 21a on the surface of the substrate 21, through holes 21a, 21b pierced into the substrate 21 in the end part areas of the conductive pattern, and power supply parts 24, 25 formed on the rear face of the substrate 21 in the areas of the through holes 21a, 21b and connected to the conductive pattern through the through holes 21a, 21b. Since driving voltage is applied from the power supply parts 24, 25 formed on the rear face of the substrate 21 to the coil 22 formed on the substrate 21 constituting the magnetic field generator, there is no wiring to the coil on the optical disk side of the substrate 21. Thereby the wiring is not brought into contact with the optical disk and there is no fear of big damage occuring on the optical disk or the disconnection of the wiring.
-
公开(公告)号：JPH10188320A
公开(公告)日：1998-07-21
申请号：JP34090496
申请日：1996-12-20
Applicant: SONY CORP
Inventor： ICHIMURA ISAO , MAEDA FUMISADA , YAMAMOTO KENJI , OSATO KIYOSHI , WATANABE TOSHIO , SUZUKI AKIRA
IPC: G11B7/135 , G11B7/09 , G11B7/125 , G11B7/1372 , G11B7/1374 , G11B7/24 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To record or reproduce information in high density by specifying the thickness of an optical disk and integrally performing focus controls of an objective lens and a front lens while making the total numerical aperture of the objective lens and the front lens a value equal to or above a specific value. SOLUTION: When there is a variation in thickness of a substrate 61, a spherical abberation is generated. Then, in the case a two-group lens having a high numerical aperture is used as a lens unit, when the thickness of the substrate 61 is fluctuated remarkably, the quality of a reproduced signal is impaired largely. Since when the thickness of the substrate is thickened too much, the influence due to a skew becomes large, it is desirable to make the thickness of the substrate to be within the range of 0.1mm to 0.3mm and it is made to be =0.8 because the multiple of about 1.8 times is multiplied with respect to the numerical aperture of an incident light.
-
公开(公告)号：JPH09245391A
公开(公告)日：1997-09-19
申请号：JP5567796
申请日：1996-03-13
Applicant: SONY CORP
Inventor： SUZUKI AKIRA , MAEDA FUMISADA , WATANABE TOSHIO , YAMAMOTO KENJI , OSATO KIYOSHI , ICHIMURA ISAO
IPC: G11B11/105 , G11B5/02 , G11B11/10
Abstract: PROBLEM TO BE SOLVED: To save power and to miniaturize and inghten a device. SOLUTION: A tip ball lens 43 irradiates laser light generated by a semiconductor laser and incident through a prescribed optical system on a prescribed position of a magneto-optical disk 1. A magnetic field modulation coil 42 generates magnetic field answering to a prescribed recording signal to apply it to the irradiative position of the laser light. The magnetic field modulation coil 42 and a radiator 44 are loaded on the periphery of the tip ball lens 43, and since the magnetic field modulation coil 42 is arranged on the position the most suitable for the recording layer of the disk 1 when the laser light is focused, it can apply the magnetic field of sufficient strength by irreducible minimum power.
-
公开(公告)号：JPH0954952A
公开(公告)日：1997-02-25
申请号：JP20448695
申请日：1995-08-10
Applicant: SONY CORP , SONY DISC TECHNOLOGY INC
Inventor： NAKAYAMA KUNIO , OSATO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To obtain a stable RF signal by eliminating a mechanical positional error between a photodetector and a measuring spot due to deformation in an optical disk. SOLUTION: An anamorphic prism 4 makes a laser beam through a collimate lens 3 of a circle. A grating 5 separates the laser beam to at least three pieces of luminous flux components. A half mirror 10 separates return light from the optical disk 20 converged by a condenser lens 9 onto an RF signal system optical path 11 and a servo signal system optical path 15. A concave lens 12 enlarges the return light on the RF signal system optical path 11. A slit 13 eliminates ±1st-order light among the return light enlarged by the concave lens 12. The photodetector 14 for an RF signal receives zero-order light transmitting through the slit 13. The photodetector 17 for a servo signal receives the zero-order light and the ±1st-order light led by a multi-lens 16.
-
-
-
-
-
-
-
-
-
Search Results
141
records
(took 0.025 seconds)
