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1. 发明专利

JP2008123659A Optical information recording/reproducing device and objective lens for the same 审中-公开
标题翻译：光信息记录/再现设备和目标镜头
公开(公告)号：JP2008123659A
公开(公告)日：2008-05-29
申请号：JP2007269064
申请日：2007-10-16
申请人： Pentax Corp , ペンタックス株式会社
发明人： KOREEDA DAISUKE , TAKEUCHI SHUICHI
IPC分类号： G11B7/135 , G02B5/18 , G02B13/00 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To provide an objective lens used for an optical information recording/reproducing device capable of recording/reproducing information with high accuracy to/from different types of optical discs and forming a satisfactory spot on a recording surface by suppressing aberration. SOLUTION: The objective lens is a cemented lens including two optical elements made of different materials and cemented via a cementing surface. When refractive indices of first and second optical elements to a beam having a first wavelength are defined as nB1 and nB2, respectively, refractive indices of the first and the second optical elements to a beam having a second wavelength are defined as nR1 and nR2, respectively, a radius of curvature, a conical coefficient and a 4th non-spherical face coefficient of the cementing surface are defined as r2, k2 and A42, respectively, and a focal distance of the objective lens when the beam having the first wavelength is used is defined as f1, conditional expression (1) is satisfied. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：提供一种用于光信息记录/再现装置的物镜，其能够以高精度记录/再现来自不同类型的光盘的信息，并通过抑制在记录表面上形成令人满意的斑点像差。解决方案：物镜是一种胶合透镜，包括由不同材料制成的两个光学元件，并通过胶合表面胶合。当第一和第二光学元件与具有第一波长的光束的折射率分别被定义为nB1和nB2时，第一和第二光学元件与具有第二波长的光束的折射率分别被定义为nR1和nR2 ，固结面的曲率半径，圆锥系数和第四非球面系数分别定义为r2，k2和A42，当使用具有第一波长的光束时物镜的焦距为定义为f1，满足条件表达式（1）。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2007280543A Optical information recording and reproducing unit 有权
标题翻译：光信息记录和复制单元
公开(公告)号：JP2007280543A
公开(公告)日：2007-10-25
申请号：JP2006107096
申请日：2006-04-10
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI
IPC分类号： G11B7/135 , G11B7/09
CPC分类号： G11B7/0909 , G11B7/1353 , G11B7/1362 , G11B7/1381
摘要： PROBLEM TO BE SOLVED: To provide an optical information recording and reproducing unit which makes a servo signal by using a plurality of beams and can produce a good focus error signal by suppressing noise even in the case of defocusing. SOLUTION: The optical information recording and reproducing unit has a light source for illuminating divergent rays, a beam splitting means for splitting the divergent rays into the first beam and a plurality of beams whose light intensity is weaker than the first beam, an objective lens for condensing each beam on the recording plane of the optical disk, an astigmatism generating means for generating astigmatism to each beam reflected on the recording plane of the optical disk, and a signal generating means for generating the focus error signal by receiving each beam via the astigmatism generating means. At least the first beam out of the beams condensed on the recording plane of the optical disk is within the range of 70% of a diameter of a pupil on the basis of an optical axis, and takes the maximum value at a prescribed height not on the optical axis so as to take intensity distribution in such a way as declining when going to the periphery of the pupil from the prescribed height. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种通过使用多个光束来形成伺服信号的光学信息记录和再现单元，并且即使在散焦的情况下也可以通过抑制噪声产生良好的聚焦误差信号。解决方案：光信息记录和再现单元具有用于照射发散光线的光源，用于将发散光线分裂成第一光束的分束装置和光强度弱于第一光束的多个光束，用于在光盘的记录平面上聚光每个光束的物镜，用于对在光盘的记录平面上反射的每个光束产生像散的像散产生装置，以及用于通过接收每个光束产生聚焦误差信号的信号发生装置通过散光产生装置。至少在光盘的记录平面上聚集的光束中的第一光束在基于光轴的光瞳直径的70％的范围内，并且在不在其上的规定高度处取最大值光轴以从规定高度到瞳孔周边的下降的方式取得强度分布。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2007004962A Objective lens for optical information recording, reproducing, device and optical information recording, reproducing, device 有权
标题翻译：用于光信息记录，再现，设备和光信息记录，再现，设备的目标镜头
公开(公告)号：JP2007004962A
公开(公告)日：2007-01-11
申请号：JP2006142128
申请日：2006-05-22
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 , G02B5/18 , G02B13/00 , G02B13/18
摘要： PROBLEM TO BE SOLVED: To form a satisfactory spot suppressing spherical aberration on a recording surface of each optical disk even if recording or reproducing information to/from three kinds of optical disks using a plurality of luminous fluxes and to suppress reduction of a focusing function when an optical disk having relatively low recording density is used. SOLUTION: An objective lens for an optical information recording and reproducing device includes a phase shift structure having a plurality of concentric refractive surfaces in a first region of at least any one surface where a luminous flux having a third wavelength is converged on a recording surface of a third optical disk. The objective lens is made of material with an Abbe number νd satisfying a condition 40≤νd≤80. The phase shift structure has a step between each couple of the adjacent refractive surfaces that gives an optical path difference to an incident luminous flux, so that a condition 2N+1 COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：即使使用多个光通量从三种光盘记录或再现信息，也能够在每个光盘的记录表面上形成令人满意的斑点抑制球面像差，并且抑制当使用具有较低记录密度的光盘时，聚焦功能。解决方案：用于光学信息记录和再现装置的物镜包括在至少任何一个表面的第一区域中具有多个同心折射表面的相移结构，其中具有第三波长的光束会聚在第三光盘的记录表面。物镜由阿贝数νd满足条件40≤vd≤80的材料制成。相移结构在每对相邻的折射表面之间具有给入射光束的光程差的步骤，使得满足条件2N + 1 <¾ΔOPD/λ1¾<2N + 1.3，其中ΔOPD表示光学该阶梯给出具有第一波长的光束的路径差，N表示零或更大的整数。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2005129209A Objective lens 有权
标题翻译：物镜
公开(公告)号：JP2005129209A
公开(公告)日：2005-05-19
申请号：JP2004290869
申请日：2004-10-04
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： G02B13/00 , G02B13/18 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an objective lens capable of forming a proper spot in a disc recording surface, by suppressing the occurrence of a coma aberrations, even when optical disks of different standards are used. SOLUTION: This objective lens enables recording/reproducing of information to/from two kinds of optical disks of different standards, i.e., a first optical disc, and a second optical disc having a relatively thicker protective layer than that of the first optical disk, by separately using two kinds of luminous fluxes having first and second wavelengths. The objective lens satisfies a conditional expression (1), where M1 is the magnifying power, when information is recorded/reproduced to/from the first optical disk by using the luminous flux of the first wavelength, and M2 is the magnifying power, when information is recorded/reproduced to/from the second optical disk by using the luminous flux of the second wavelength which is longer than the first wavelength, and a ring-like diffraction structure is employed for at least one surface to correct the spherical aberrations of each disk. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：即使当使用不同标准的光盘时，通过抑制彗形像差的发生，提供能够在盘记录表面中形成适当斑点的物镜。解决方案：该物镜能够向/从具有不同标准的两种光盘（即，第一光盘）和具有比第一光学器件的相对较厚的保护层的第二光盘记录/再现信息通过分别使用具有第一和第二波长的两种光束。物镜满足条件式（1），当信息通过使用第一波长的光通量从第一光盘记录/再现信息时，M1是放大倍数，M2是放大倍数，当信息通过使用比第一波长长的第二波长的光束，从第二光盘记录/再现，并且至少一个表面采用环状衍射结构，以校正每个盘的球面像差。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2005018966A Optical system of optical disk 有权
标题翻译：光盘光学系统
公开(公告)号：JP2005018966A
公开(公告)日：2005-01-20
申请号：JP2004164440
申请日：2004-06-02
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI
IPC分类号： G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide the optical system of an optical disk which is capable of satisfactorily suppressing various aberrations generated during information recording or reproduction even when a coupling lens is omitted, and realizing in particular the recording/reproduction on a plurality of kinds of optical disks having different protective layer thicknesses. SOLUTION: An optical system of an optical disk is provided with a light source and an objective lens, and a coupling lens is omitted between the light source and objective lens. The optical system satisfies a condition (1): 0.75 COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题：为了提供能够令人满意地抑制在信息记录或再现期间产生的各种像差的光盘的光学系统，即使在省略耦合透镜时，特别地实现多个记录/再现具有不同保护层厚度的各种光盘。解决方案：光盘的光学系统设置有光源和物镜，并且在光源和物镜之间省略耦合透镜。光学系统满足条件（1）：0.75

6. 发明专利

JP2004054133A Scanning optical system 有权
公开(公告)号：JP2004054133A
公开(公告)日：2004-02-19
申请号：JP2002214380
申请日：2002-07-23
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI , TAKAKUBO YUTAKA
IPC分类号： B41J2/44 , G02B13/00 , G02B13/18 , G02B26/10 , G02B26/12 , H04N1/113
CPC分类号： G02B26/125
摘要： PROBLEM TO BE SOLVED: To provide a scanning optical system which prevents the ghost light due to reflection of laser beam fluxes on the respective lens surfaces of an imaging lens from entering surfaces to be scanned.
SOLUTION: A laser beam source 11 and a cylindrical lens 12 make the laser beam fluxes incident on the respective reflecting surfaces of a polygon mirror 13 from a direction diagonal to a vertical scanning direction. While the laser beam fluxes reflected by the respective reflecting surfaces are dynamically deflected in a horizontal scanning direction, the laser beam fluxes are made incident on a scanning lens 21 and the first surface of the scanning lens 21 satisfies the following conditions: (1) H/2

7. 发明专利

JP2004029234A Optical system and apparatus for projection exposure 有权
公开(公告)号：JP2004029234A
公开(公告)日：2004-01-29
申请号：JP2002183258
申请日：2002-06-24
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI , TAKAKUBO YUTAKA
IPC分类号： G02B13/24 , G02B17/08 , G03F7/20 , G03F7/22 , G03F9/02 , H01L21/027
摘要： PROBLEM TO BE SOLVED: To adjust projection magnification while employing a constitution such that the optical axis of an imaging lens is set parallel to a mask surface and a projected surface and luminous flux which travels forward and backward in the imaging lens is guided to the projected surface by using a mirror. SOLUTION: A projection exposure optical system 10 projects light emitted by an illumination optical system 1 to expose a plate 3 to a pattern of the mask 2 almost with nonmagnification and has 1st and 2nd condenser lenses 11 and 15 having a common optical axis nearly perpendicular to the mask 2 and plate 3 and an imaging lens 13 having an optical axis perpendicular thereto; and the luminous flux from the mask 2 is made incident on the imaging lens 13 by a 1st mirror 12a, reflected by a 2nd mirror 14, passed through the imaging lens 13, and then reflected by the 3rd mirror 12b to be made incident on the 2nd condenser lens 15. The 2nd condenser lens 15 is movable along the optical axis A×1 for magnification adjustment. COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2003029015A Diffraction optical device and objective lens for optical head 有权
$Diffraction optical device and objective lens for optical head$
标题翻译：用于光学头的衍射光学器件和目标透镜
公开(公告)号：JP2003029015A
公开(公告)日：2003-01-29
申请号：JP2001218122
申请日：2001-07-18
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI , MARUYAMA KOICHI
IPC分类号： G02B5/18 , G02B13/00 , G02B13/18 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To prevent the lowering of diffraction efficiency by preventing the influence by the rounding of shape at the time of molding even in the case of utilizing high-order diffracted light. SOLUTION: The diffraction lens structure of the diffraction optical device has a level difference to give the difference of optical path length macroscopically being the integral multiple of wavelength in order to utilize the high-order diffracted light. The step difference is formed like a step to give the difference of optical path length as long as one wavelength microscopically, and a narrow ring zone Rn is formed for every step. Assuming that the absolute value of the difference of the optical path length given by the i-th level difference counted from an optical axis is ΔE(i), and the absolute value of the difference of the optical path length imparted to the base shape of the diffraction lens structure between the end on the inner circumferential side and the end on the outer circumferential side of the zone between the i-th level difference and the (i+1)th level difference is ΔZ(i), the narrow ring zone Rn satisfies a condition (1), and a wide ring zone Rw put between the macroscopic level differences satisfies a condition (2). (1) ΔZ(i) (3/2)×ΔE(i).
摘要翻译：要解决的问题：即使在利用高次衍射光的情况下，通过防止成型时的形状的四舍五入的影响来防止衍射效率的降低。解决方案：为了利用高阶衍射光，衍射光学器件的衍射透镜结构具有水平差，以宏观地表示波长的整数倍的光程长度差。台阶差形成为使得在一个波长显微镜下长达一个波长的光程长度的差异，并且对于每个步骤形成窄环带Rn。假设由光轴计数的第i级差分给出的光程长度的差的绝对值为ΔE（i），并且赋予基准形状的光程长度差的绝对值第i级差和第（i + 1）级差之间的内周侧端部与外周侧端部之间的衍射透镜结构为ΔZ（i），窄环带 Rn满足条件（1），并且宏观水平差之间的宽环区Rw满足条件（2）。（1）ΔZ（i）<（1/2）×ΔE（i）（2）ΔZ（i）>（3/2）×ΔE（i）。

9. 发明专利

JP2005203081A Optical system for optical disk 有权
标题翻译：光盘光学系统
公开(公告)号：JP2005203081A
公开(公告)日：2005-07-28
申请号：JP2004364326
申请日：2004-12-16
申请人： Pentax Corp , ペンタックス株式会社
发明人： TAKEUCHI SHUICHI
IPC分类号： G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical system for optical disk which can suppress good various aberration caused at the time of recording and reproducing of information even if a coupling lens is omitted, especially, an optical disk for optical system realizing recording and reproducing of information for the optical disks of a plurality of kind of which the thickness of protecting layers are different. SOLUTION: This is the optical system for optical disk in which an optical disk of which the numerical aperture of an optical disk side required for recording and/or reproducing of information is 0.60 or more can be used. The system has a light source emitting diverging light , an objective lens converging the diverging light from the light source on the optical disk, a driving means focusing the objective lens and tracking-shifting or changing attitude of the objective lens, the drive means is carried out to configuration performed simultaneously operation changing attitude of the objective lens so that the central axis of the objective lens is faced to the light source direction at the time of tracking-shift. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种光盘的光学系统，即使省略了耦合透镜，也能够抑制在记录和再现信息时引起的各种像差，特别是实现光学系统的光盘的记录以及再现保护层的厚度不同的多种光盘的信息。解决方案：这是用于光盘的光学系统，其中可以使用其中用于记录和/或再现信息所需的光盘侧的数值孔径为0.60或更大的光盘。该系统具有发射发散光的光源，将来自光源的发散光会聚在光盘上的物镜，聚焦物镜的跟踪移动或改变姿态的驱动装置，驱动装置被携带进行配置，同时执行物镜的操作改变姿态，使得物镜的中心轴在跟踪偏移时面向光源方向。版权所有（C）2005，JPO＆NCIPI

10. 发明专利

JP2004247034A Optical pickup system 审中-公开
公开(公告)号：JP2004247034A
公开(公告)日：2004-09-02
申请号：JP2004012235
申请日：2004-01-20
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： G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup system having compatibility to a plurality of optical disks different in standard of protective layer thickness, and a large operation distance and good aberration characteristics even when a disk protective layer thickness is applied to a relatively thick disk. SOLUTION: In an optical disk objective lens, at least when information is recorded or reproduced to/from a first optical disk, a luminous flux emitted from one of a plurality of light sources and made incident through a coupling lens on the objective lens is a dispersed light having spherical aberration. The spherical aberration of the entire system is corrected by the spherical aberration of the dispersed light and spherical aberrations generated on the objective lens and the disk protective layer, and the coma aberration of the entire system when the objective lens is shifted is corrected by a coma aberration component caused by the spherical aberration of the coupling lens and coma aberration components generated on the object lens and the disk protective layer. COPYRIGHT: (C)2004,JPO&NCIPI

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