公开(公告)号：JP2000163781A

公开(公告)日：2000-06-16

申请号：JP33147198

申请日：1998-11-20

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO ,  ICHIMURA ISAO ,  OSATO KIYOSHI

IPC: G11B7/125 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105

Abstract: PROBLEM TO BE SOLVED: To provide an optical disk device capable of suppressing deviations of manufacturing accuracy of optical systems and optical disks and of oscillation wavelengths of semiconductor lasers by stabilizing the position of a spot on a recording surface and to provide the focal position control method of the optical disk device. SOLUTION: In an optical disk device having a light source 21 outputting a laser light beam, a light converging means 41 converging an output light from the light source on the recording surface of an optical disk 1 and a holding mechanism holding the light converging means at a certain distance as to a focus direction, this device is provided with a wavelength control means 20 which is capable of adjusting the wavelength of the output light from the light source by allowing one part of the output light to be made incident on the means 20 and by adjusting the wavelength of the incident laser beam and by returning the laser beam toward the light source 21.

公开(公告)号：JP2000149315A

公开(公告)日：2000-05-30

申请号：JP31941398

申请日：1998-11-10

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO ,  YAMADA MASAHIRO ,  KOCHIYAMA AKIRA ,  YAMAMOTO KENJI ,  ICHIMURA ISAO ,  OSATO KIYOSHI

IPC: G11B7/09 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To maintain the stability of an optical contact state by holding a light converging means at the optical contact state with the surface of an optical disk, maintaining a specified flying height with respect to the surface of an optical dish by an air lubricating surface and forming the light converging means of a Fresnel lens integrally formed on the surface of a slider consisting of a transparent material on the side opposite to its air lubricating surface. SOLUTION: The slider 22 is eventually made to float and travel at the prescribed flying height with respect to the surface of the optical disk 11 by the positive pressure generated by the air stream flowing between the air lubricating surface and the surface of the optical disk 11. As a result, a Fresnel lens 21 instructed on the slider 22 is eventually maintained at the specified spacing with the surface of the optical disk 11, i.e., in the optical contact state. Then, the Fresnel lens 21 is made to occupy always the focus position with respect to the signal recording surface of the optical disk 11 by selecting the flying height of the slider 22 so as to converge the light beam to the signal recording surface of the optical disk 11.

公开(公告)号：JP2000149312A

公开(公告)日：2000-05-30

申请号：JP32398598

申请日：1998-11-13

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO ,  KOCHIYAMA AKIRA ,  OSATO KIYOSHI

IPC: G11B21/21 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To make it possible to reduce damage on an air lubrication surface and a leading edge of a slider, and also to reduce losses on a boundary between an optical lens and the slider. SOLUTION: This device irradiates a rotating optical disc with a beam of light via a light focusing means 21, and has an optical pickup for detecting return light from the optical disk by a photo-detector. The light focusing means 21 comprises at least an optical lens 22 maintained in an optical contact state to the surface of the optical disk. And, this optical lens 22 is supported by a slider 24 holding a fixed flying height to the optical disk surface by an air lubrication surface 24a. Further, this optical lens is bonded to the depth of cut 25 formed in the direction perpendicular to the air lubrication surface.

公开(公告)号：JP2000149304A

公开(公告)日：2000-05-30

申请号：JP31941498

申请日：1998-11-10

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO ,  YAMAMOTO KENJI ,  ICHIMURA ISAO ,  OSATO KIYOSHI

IPC: G11B7/135 ,  G02B1/02 ,  G02B3/00 ,  G02B7/28 ,  G02B13/00 ,  G11B7/22

Abstract: PROBLEM TO BE SOLVED: To produce a lens of a low cost by providing a light converging means with a hemispherical lens for holding the surface of an optical disk in an optical contact state, maintaining its aperture ratio at a specific constant and forming planes proximate to the optical disk surface of the hemispherical lens, then forming a spherical portion. SOLUTION: The condenser lens 25 as the light converging means is composed, successively from a light source side, of an objective lens 41 and a front lens 3. The front lens 43 is constituted by first forming a first plane 43a and a second plane 43b, then forming the spherical portion and, therefore, the portions annihilated by polishing in a polishing stage for forming the spherical portion are decreased. Then, the polishing stage ends in a short period of time and the material cost is eventually reduced. If the form of the raw material is a wafer the easy manufacture of the large-sized lens is made possible. Further, the second plane 43b is easily formed with respect to the first plane 43a and, therefore, the accuracy of the first plane 43a and the second plane 43b is easily improved.

公开(公告)号：JP2003317311A

公开(公告)日：2003-11-07

申请号：JP2002112872

申请日：2002-04-16

Applicant: Sony Corp ,  ソニー株式会社

Inventor： KIJIMA KOICHIRO

IPC: G11B7/24 ,  G11B7/135 ,  G11B7/26

Abstract: PROBLEM TO BE SOLVED: To flatten a recording layer formed on an intermediate layer and a surface of an optical recording medium in the optical recording medium having two or more recording layers. SOLUTION: In the optical recording medium configured by stacking a plurality of recording layers 3 and 5 with an intermediate layer 4 inbetween, the intermediate layer 4 has a layered structure of a first intermediate layer 6 formed at least by sputtering and a second intermediate layer 7 formed by spin coating. The intermediate layer 4 is formed by stacking the first intermediate layer 6 at least by sputtering and forming the second intermediate layer 7 on the first intermediate layer 6 by spin coating in this order. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：在具有两个或更多个记录层的光记录介质中，使在中间层和光记录介质的表面上形成的记录层变平。 解决方案：在通过在中间层4之间堆叠多个记录层3和5而构成的光记录介质中，中间层4具有至少通过溅射形成的第一中间层6和第二中间层6的层叠结构 中间层7通过旋涂形成。 中间层4至少通过溅射层叠第一中间层6，并通过旋涂以此顺序在第一中间层6上形成第二中间层7而形成。 版权所有（C）2004，JPO

公开(公告)号：JP2003177438A

公开(公告)日：2003-06-27

申请号：JP2001378358

申请日：2001-12-12

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO

IPC: G02F1/01 ,  G02F1/31

Abstract: PROBLEM TO BE SOLVED: To provide an optical switch in which switching time is reduced, manufacturing is made easy and the cost is reduced and to provide a driving method of the switch in which reliability is secured. SOLUTION: When a phase varying film of an optical path switching means 25 of an optical switch 20 becomes a crystal state i.e. a first switching state, light beams L1 being inputted into a first input connector section 21 are led to a first output connector section 23 and light beams L2 inputted into a second input connector section 22 are led to a second output connector section 24. When the phase varying film of the means 25 becomes an amorphous state i.e. a second switching state, the light beams L1 being inputted into the section 21 are led to the section 24 and the light beams L2 being inputted into the section 22 are led to the section 23. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002074726A

公开(公告)日：2002-03-15

申请号：JP2000266171

申请日：2000-09-01

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO ,  KOCHIYAMA AKIRA

IPC: G02B7/02 ,  G02B3/00 ,  G11B7/135 ,  G11B7/22

Abstract: PROBLEM TO BE SOLVED: To provide an optical element for a slider, capable of reducing restric tion in forming an air lubricating surface opposed to the surface of an optical disk. SOLUTION: The optical element 20 for a slider is equipped with a base plate 24A consisting of an optical material. In the base plate 24A, the air lubricating surface 70 is formed opposite to the surface of the optical disk. On the air lubricating surface 70, grooves 71-73 for adjusting a floating amount from the surface of the optical disk are formed. On the rear surface of the air lubricating surface 70 of the base plate 24A, a projected part 21 having a function of a convex lens and a flat part 22 located in the periphery of the projected part 21 are formed. The thickness of the base plate 24A at the projected part 21 is thicker than that of the base plate at the flat part 22.

公开(公告)号：JP2002032934A

公开(公告)日：2002-01-31

申请号：JP2000216120

申请日：2000-07-17

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO ,  KURODA YUJI ,  ICHIMURA ISAO

IPC: G11B7/254 ,  G11B7/24 ,  G11B7/257 ,  G11B7/26 ,  G11B11/105

Abstract: PROBLEM TO BE SOLVED: To improve the problem of defects such as a scratch onto a surface layer and enhance yields and mass-productivity, in a polishing process of a surface of an optical recording medium. SOLUTION: In the optical recording medium M used at a distance of

公开(公告)号：JP2001243663A

公开(公告)日：2001-09-07

申请号：JP2000051957

申请日：2000-02-28

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO

IPC: G03F7/32 ,  G11B7/09 ,  G11B7/26

Abstract: PROBLEM TO BE SOLVED: To easily and surely control focusing of laser beam in the manufacturing process of a recording medium and a master disk for the manufacture of the recording medium when a material layer formed on the substrate constituting the recording medium and the master disk is irradiated with the laser beam according to the recording pattern. SOLUTION: In the recording medium manufacturing method including a process of irradiating a material layer 12 formed on the substrate 11 which constitutes the recording medium with laser beam according to the recording pattern in the production process of the recording medium, the material layer 12 has specified reflectance for the laser beam 13 to generate returning light beam in the laser beam 13. The returning light bema is detected to control the focus of the spot by the irradiating laser beam on the material layer.

公开(公告)号：JP2001243662A

公开(公告)日：2001-09-07

申请号：JP2000047819

申请日：2000-02-24

Applicant: SONY CORP

Inventor： KIJIMA KOICHIRO

IPC: G11B7/26

Abstract: PROBLEM TO BE SOLVED: To sufficiently increase the adhesion property of a photosensitive material layer in the formation of a fine rugged pattern and to suppress increase in the number of production processes therefor in a method of manufacturing a recording medium having a fine rugged pattern and in a method of manufacturing a master disk for the manufacture of a recording medium. SOLUTION: In the method of manufacturing a recording medium having the fine rugged pattern in the process of patterning by pattern exposure and development of a photosensitive material layer, a base layer 4 which improves the adhesion property of the photosensitive material layer 5 and which shows solubility with the developer for the development of the photosensitive material layer is formed on the structural substrate 1 of the recording medium, and then the photosensitive layer is formed on the base layer. Thus, the base layer is patterned at the same time of developing the photosensitive material after the pattern exposure.