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31. 发明专利

JP2005018967A Objective lens of optical pick-up and optical pickup device 有权
标题翻译：光学拾取和光学拾取器件的目标镜头
公开(公告)号：JP2005018967A
公开(公告)日：2005-01-20
申请号：JP2004164441
申请日：2004-06-02
申请人： Pentax Corp , ペンタックス株式会社
发明人： MARUYAMA KOICHI , KOREEDA DAISUKE
IPC分类号： G02B5/18 , G02B3/10 , G02B13/18 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device capable of forming a good spot during recording/reproducing information in/from an existing optical disk and a new standard optical disk. SOLUTION: The optical pick-up device is provided with an objective lens. Luminous fluxes having first and second wavelengths are made incident on the objective lens in an approximately parallel manner and a luminous flux having a third wavelength is made incident on the lens as diverging light beams. Let respective image forming magnifications during recording or reproducing of information for first to third optical disks be M1 to M3 and focal distances be f1 to f3. Then, the following conditions are satisfied; condition (1) -0.02 COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够在从现有光盘和新标准光盘记录/再现信息期间形成良好光点的光学拾取装置。光拾取装置具有物镜。具有第一和第二波长的光通量以大致平行的方式入射到物镜上，并且具有第三波长的光束作为发散光束入射到透镜上。在第一至第三光盘的信息的记录或再现期间，各自的图像形成放大率为M1至M3，焦距为f1至f3。然后，满足以下条件; 条件（1）-0.02

32. 发明专利

JP2004362626A Objective lens for optical pickup, and optical pickup device 有权
公开(公告)号：JP2004362626A
公开(公告)日：2004-12-24
申请号：JP2003156358
申请日：2003-06-02
申请人： Pentax Corp , ペンタックス株式会社
发明人： MARUYAMA KOICHI , KOREEDA DAISUKE
IPC分类号： G02B13/00 , G02B13/18 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an objective lens for an optical pickup, by which a good spot is formed by suppressing a spherical aberration even at the recording or reproducing operation of the information for any of an existing optical disk and a new standard optical disk. SOLUTION: In the objective lens for the optical pickup, when almost parallel rays for luminous flux of 1st and 2nd wavelengths are incident to the objective lens and divergent rays for luminous flux of 3rd wavelength is incident to the objective lens and image forming magnifications are expressed as m1 to m3 and focal distances are expressed as f1 to f3 at the information recording or reproducing operation with respect to each optical disk, following equations: -0.02 COPYRIGHT: (C)2005,JPO&NCIPI

33. 发明专利

JP2004303406A Optical system for optical pickup 审中-公开
标题翻译：光学光学系统
公开(公告)号：JP2004303406A
公开(公告)日：2004-10-28
申请号：JP2004082940
申请日：2004-03-22
申请人： Pentax Corp , ペンタックス株式会社
发明人： KOREEDA DAISUKE , MARUYAMA KOICHI , TAKEUCHI SHUICHI
IPC分类号： G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical system for an optical pickup in which a sufficiently long operating range is secured and a good aberration characteristic is maintained even when there are an objective lens shift and a coupling lens eccentricity. SOLUTION: The optical system for the optical pickup is provided with a coupling lens in which radius of curvature of a first surface located at a light source side and radius of curvature of a second surface located at an optical disk side satisfy a prescribed condition, a non-spherical surface having a positive amount of sphericality at a maximum effective diameter is provided on one surface and a meniscus shape is provided having projection on the optical disk side and a common objective lens for each optical disk. Spherical aberration of the total system is corrected by spherical aberration of diverging beams being incident on the objective lens while a first optical disk is used and the spherical aberration generated by the objective lens or the like. Coma aberration of the entire system caused by objective lens shift is corrected by cancellation of coma aberration equivalent component of laterally shifted spherical aberration possessed by diverging beams emitted from the coupling lens and the coma aberration component generated by the objective lens. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种其中确保足够长的操作范围并且即使当存在物镜偏移和耦合透镜偏心时也保持良好的像差特性的光学拾取器的光学系统。解决方案：用于光学拾取器的光学系统设置有耦合透镜，其中位于光源侧的第一表面的曲率半径和位于光盘侧的第二表面的曲率半径满足规定的条件是，在一个表面上设置具有最大有效直径的正球面度的非球面，并且在光盘侧设置有具有突出部的弯液面形状和用于每个光盘的公共物镜。通过使用入射到物镜上的发散光束的球面像差来校正总体系的球面像差，同时使用第一光盘和由物镜等产生的球面像差。通过消除由耦合透镜发射的发散光束所产生的横向偏移的球面像差的彗形像差等效分量和由物镜产生的彗形像差分量来校正由物镜偏移引起的整个系统的彗形像差。版权所有（C）2005，JPO＆NCIPI

34. 发明专利

JP2004191929A Scanning optical system and printer 有权
公开(公告)号：JP2004191929A
公开(公告)日：2004-07-08
申请号：JP2003317423
申请日：2003-09-09
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI , KOREEDA DAISUKE
IPC分类号： B41J2/44 , G02B5/00 , G02B26/10 , G02B26/12 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a scanning optical system and a printer in which an excessive side lobe over a threshold is suppressed as far as possible even when a microscopic waviness exists to some extent on the optical face of an image formation optical system. SOLUTION: A scanning optical system is so composed that a partial light shielding member 3 which shields only the luminous flux of a laser beam which passes an annular region which is separated by a predetermined distance in the radial direction from the center axis of the beam with a light shielding part 3a is arranged on the optical path of a laser beam between a laser light source 1 and a polygon mirror 6. Further, a laser beam printer in which such a scanning optical system is included is composed. COPYRIGHT: (C)2004,JPO&NCIPI

35. 发明专利

JP2003322793A Objective lens for optical head 审中-公开
标题翻译：光头目镜
公开(公告)号：JP2003322793A
公开(公告)日：2003-11-14
申请号：JP2002133140
申请日：2002-05-08
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI , MARUYAMA KOICHI , KOREEDA DAISUKE
IPC分类号： G02B13/00 , G02B13/18 , G11B7/00 , G11B7/135
CPC分类号： G11B7/139 , G11B7/1353 , G11B7/1374 , G11B2007/0006
摘要： PROBLEM TO BE SOLVED: To provide an objective lens capable of suppressing a side lobe at the time of using an optical disk used in a state where the light is condensed with a low NA (numerical aperture). SOLUTION: The objective lens 10 is a single lens, both faces of which are aspherical, and a diffraction lens structure is formed on at least one face 11 of the lens. The diffraction lens structure formed in a center area Rc is designed so that the diffraction efficiency of primary diffraction light may become the largest for two wavelengths. The diffraction lens structure formed in an ambient area Rh is set as follows, the phases of two kinds of luminous flux transmitted through the ambient area and the center area become nearly the same for the wavelength corresponding to a DVD, and the phase of the luminous flux transmitted through a circular band constituting a 1st annular area in the ambient area Rh is different from the phase of the luminous flux transmitted through the center area for the wavelength corresponding to a CD, the phase of the luminous flux transmitted through a circular band constituting a 2nd annular area positioned outside the 1st annular area is made to be nearly the same as the phase of the luminous flux transmitted through the center area Rc. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种能够抑制在以低NA（数值孔径）聚光的状态下使用的光盘时的旁瓣的物镜。解决方案：物镜10是双面是非球面的单透镜，并且在透镜的至少一个表面11上形成衍射透镜结构。形成在中心区域Rc中的衍射透镜结构被设计成使得一次衍射光的衍射效率可以变得对于两个波长最大。在环境区域Rh中形成的衍射透镜结构设置如下，通过环境区域和中心区域传播的两种光束的相位对于对应于DVD的波长变得几乎相同，并且发光通过构成环境区域Rh中的第一环形区域的圆形带的通量不同于通过对应于CD的波长的中心区域透射的光束的相位，通过构成的圆形带的透射光的相位使位于第一环形区域外侧的第二环形区域与透过中心区域Rc的光束的相位几乎相同。版权所有（C）2004，JPO

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