公开(公告)号：US4484803A

公开(公告)日：1984-11-27

申请号：US443238

申请日：1982-11-22

申请人： Norikazu Arai

发明人： Norikazu Arai

IPC分类号： G02B13/00 ,  G02B13/24 ,  G02B21/02 ,  G02B9/06

CPC分类号： G02B21/02 ,  G02B13/24

摘要： This invention relates to an objective lens for regenerating a video disc or the like. A semiconductor laser is used as a light source to directly drive an objective lens for carrying out tracking, and thus the lens must be small and light-weight, but the aberration on the optical axis could well be corrected. However, because of small-size of lens, a manufacture error such as eccentricity is greatly affected. A positive meniscus lens on the image side is approximated to a concentric configuration by an objective lens comprising two lenses whereby the influence resulting from eccentricity may be minimized.

摘要翻译： 本发明涉及用于再生视频盘等的物镜。 使用半导体激光器作为光源来直接驱动用于进行跟踪的物镜，因此透镜必须小而重量轻，但是可以很好地校正光轴上的像差。 然而，由于镜片尺寸小，偏心等制造误差受到很大影响。 图像侧的正弯月形透镜由包括两个透镜的物镜近似为同心构造，由此偏心引起的影响可以最小化。

公开(公告)号：US07327663B2

公开(公告)日：2008-02-05

申请号：US10420911

申请日：2003-04-23

申请人： Tohru Kimura ,  Norikazu Arai

发明人： Tohru Kimura ,  Norikazu Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/1376 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A recording reproducing optical system for an optical information recording medium is provided with a light source; an objective lens; and an aberration correcting optical element provided on an optical path between the light source and the objective lens. The objective lens includes an aspherical surface and one diffractive surface on which a diffractive structure structured by a plurality of concentric ring-shaped zonal steps is formed and the objective lens is a plastic lens structured in one element in one group. The aberration correcting optical element comprises at least one plastic lens on which a diffractive structure structured by a plurality of concentric ring-shaped zonal steps is formed. The following formulas are satisfied: PD1>0 (PD1 is a diffractive power (mm−1)), PD2 0 (PR2 is a refractive power (mm−1) as a refractive lens).

摘要翻译： 一种用于光学信息记录介质的记录再现光学系统设置有光源; 物镜; 以及设置在光源和物镜之间的光路上的像差校正光学元件。 物镜包括非球面和一个衍射表面，其上形成有由多个同心环形区带台阶构成的衍射结构，并且物镜是以一个组件中的一个元件构成的塑料透镜。 像差校正光学元件包括至少一个塑料透镜，在其上形成由多个同心环状带状台阶构成的衍射结构。 满足下列公式：PD 1> 0（PD 1是衍射功率（mm -1）），PD 2 <0（PD 2是衍射功率（mm < / SUP>））和PR 2> 0（PR 2是作为折射透镜的折射光焦度（mm ^-1））。

公开(公告)号：US20050018297A1

公开(公告)日：2005-01-27

申请号：US10886625

申请日：2004-07-09

申请人： Tatsuo Ohta ,  Norikazu Arai ,  Shin-ichiro Saito

发明人： Tatsuo Ohta ,  Norikazu Arai ,  Shin-ichiro Saito

IPC分类号： G02B27/00 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G02B5/18 ,  G02B27/44

CPC分类号： G11B7/1367 ,  G02B5/1895 ,  G02B27/0037 ,  G02B27/4238 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

摘要： This invention provides an optical component which can keep the light transmittance high while ensuring good wiping resistance characteristics, and can also realize intended optical characteristics based on a fine structure, and an optical pickup apparatus including the optical component. An optical component according to this invention includes a first optical surface on which a fine structure is formed and a second optical surface on which no fine structure is formed. The number of layers of an antireflection film on the first optical surface is set to be smaller than the number of layers of an antireflection film on the second optical surface.

摘要翻译： 本发明提供一种可以保持良好的耐擦拭性特性而保持透光性高的光学部件，并且还可以实现基于精细结构的预期光学特性，以及包括该光学部件的光学拾取装置。 根据本发明的光学部件包括其上形成微细结构的第一光学表面和不形成细微结构的第二光学表面。 将第一光学面上的防反射膜的层数设定为小于第二光学面上的防反射膜的层数。

公开(公告)号：US06366542B1

公开(公告)日：2002-04-02

申请号：US09712122

申请日：2000-11-15

申请人： Toshiyuki Kojima ,  Norikazu Arai

发明人： Toshiyuki Kojima ,  Norikazu Arai

IPC分类号： G11B712

CPC分类号： G11B7/1275 ,  G02B27/0037 ,  G02B27/4283 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus to conduct reproducing and/or recording information of an optical information recording medium, comprises a light source to emit a light flux having a wavelength of &lgr; (nm); a converging optical system to converge the light flux emitted from the light source onto a information recording surface of the optical information recording medium, the converging optical system having an objective lens; and an optical detector to receive reflected light from the optical information recording medium. The objective lens is a plastic lens, has a diffracting section on at least one surface thereof and satisfies the following conditional formula: 0.3≦&phgr;R/&phgr;≦1.5 where &phgr;R represents a refracting power of the objective lens on wavelength &lgr; (nm) of the light source and &phgr; represents a power of the objective lens in wavelength &lgr; nm of the light source.

摘要翻译： 用于进行光信息记录介质的再现和/或记录信息的光拾取装置包括发射波长为lambd（nm）的光束的光源; 会聚光学系统，其将从光源发射的光束会聚到所述光学信息记录介质的信息记录表面上，所述会聚光学系统具有物镜; 以及用于接收来自光学信息记录介质的反射光的光学检测器。 物镜是塑料透镜，在其至少一个表面上具有衍射部分，并满足以下条件公式：0.3 <= phiR / phi <= 1.5其中，phiR表示物镜在波长λ（nm）上的折射能力， 的光源和phi表示光源的波长lambd nm的物镜的功率。

公开(公告)号：USRE34455E

公开(公告)日：1993-11-23

申请号：US277469

申请日：1988-11-23

申请人： Norikazu Arai ,  Shozo Ishiyama ,  Tadashi Kojima

发明人： Norikazu Arai ,  Shozo Ishiyama ,  Tadashi Kojima

IPC分类号： G02B13/18 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G02B13/18

摘要： A large-aperture single lens with aspherical surfaces to be used as a pickup lens for video disks, especially for tracking the video disk by directly moving the pickup lens. It is preferable that the single lens is made of plastic material in order to make it compact and light in weight. Both refractive surfaces of the single lens are arranged to have positive refractive powers in order to make the working distance of the lens long. Spherical aberration of the single lens is corrected to the degree that the diameter of the circle of confusion thereof is decided approximately by diffraction of light. Both refractive surfaces of the single lens are formed as aspherical surfaces and the shapes of the refractive surfaces are determined so as to correct aberrations including the sine condition to the required range, by taking the error to be caused at the time of manufacture into consideration.

公开(公告)号：US06728042B2

公开(公告)日：2004-04-27

申请号：US10126783

申请日：2002-04-22

申请人： Kohei Ota ,  Norikazu Arai

发明人： Kohei Ota ,  Norikazu Arai

IPC分类号： G11B7135

CPC分类号： G11B7/13922 ,  G02B27/0037 ,  G02B27/4238 ,  G02B27/4288 ,  G11B7/127 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

摘要： An optical pickup apparatus comprises two light sources having two wavelengths (&lgr;1

摘要翻译： 光拾取装置包括具有两个波长（λ1

公开(公告)号：US06687209B2

公开(公告)日：2004-02-03

申请号：US09862594

申请日：2001-05-23

申请人： Kohei Ota ,  Norikazu Arai

发明人： Kohei Ota ,  Norikazu Arai

IPC分类号： G11B700

CPC分类号： G11B7/1275 ,  G02B3/08 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus for at least two kinds of optical information recording media, comprises a first light source; a second light source; an optical converging system; and a photo detector. An optical element of the optical converging system comprises a first region including an optical axis and a second region adjoining the first region and locating at the outside of the first region, the first region is a refractive surface and the second region is a diffractive surface. When a first light flux passes through the second region, the light amount of n-th order diffracted ray of the first light flux is larger than that of any other order diffracted ray of the first light flux, and when a second light flux passes through the second region of the optical element, the light amount of n-th order diffracted ray of the second light flux is larger than that of any other order diffracted ray of the second light flux, where n is an integer except 0.

摘要翻译： 一种用于至少两种光学信息记录介质的光学拾取装置，包括第一光源; 第二光源; 光学会聚系统; 和光电检测器。 光学会聚系统的光学元件包括包括光轴的第一区域和与第一区域邻接并位于第一区域的外部的第二区域，第一区域是折射表面，第二区域是衍射表面。 当第一光束通过第二区域时，第一光束的n次衍射光线的光量大于第一光束的任何其它次级衍射光线的光量，并且当第二光通量通过时 光学元件的第二区域，第二光束的n次衍射光线的光量比第二光束的任何其它次级衍射光线的光量大，其中n是除0之外的整数。

公开(公告)号：US06414751B1

公开(公告)日：2002-07-02

申请号：US09643252

申请日：2000-08-22

申请人： Tatsuji Kurogama ,  Norikazu Arai ,  Makoto Banno

发明人： Tatsuji Kurogama ,  Norikazu Arai ,  Makoto Banno

IPC分类号： G01N2100

CPC分类号： G01N21/55 ,  G01N21/94 ,  G06K7/10762

摘要： A surface displacement detecting apparatus for detecting a concave, a hole on a surface of a detection object, comprises a light shielding device provided in a direction crossing the surface of the detection object, a light irradiating device provided at one side of the light shielding device and to irradiate the detection object with light; a light receiving device provided at the other side of the light shielding device and to receive at least one of regular reflection light and diffuse reflection light from the surface of the detection object; and a conveyor to convey at least one of the detection object and the light irradiating device.

摘要翻译： 一种表面位移检测装置，用于检测检测对象的表面上的凹部，孔，包括沿与检测对象的表面交叉的方向设置的遮光装置，设置在遮光装置的一侧的光照射装置 并用光照射检测对象; 光接收装置，设置在所述遮光装置的另一侧，并且从所述检测对象的表面接收规则的反射光和漫反射光中的至少一种; 以及传送器，用于输送检测对象和光照射装置中的至少一个。

公开(公告)号：US06411587B1

公开(公告)日：2002-06-25

申请号：US09685012

申请日：2000-10-05

申请人： Norikazu Arai ,  Toshiyuki Kojima ,  Koji Honda

发明人： Norikazu Arai ,  Toshiyuki Kojima ,  Koji Honda

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G11B7/1275 ,  G11B7/1376 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus for recording and/or reproducing information on an optical information recording medium includes a light source emitting a light flux, a light-converging optical system to converge a light flux emitted from the light source, having a coupling optical system which changes a divergent angle of a light flux emitted from the light source and an objective lens optical system which converges a light flux emerging from the coupling optical system on an information recording surface of the optical information recording medium, and an optical detector for detecting reflected light or transmitted light coming from the information recording surface of the optical information recording medium. In the optical pickup apparatus, at least one surface of the coupling optical system is provided with a diffraction surface by which the longitudinal spherical aberration on the occasion wherein light having a wavelength differing from that of light with a prescribed wavelength by a prescribed difference of wavelength is made to enter the objective lens optical system through the coupling optical system is made to be smaller, compared with the longitudinal spherical aberration on the occasion wherein light having a wavelength different by a prescribed difference of wavelength is made to enter the objective lens optical system.

摘要翻译： 一种用于在光学信息记录介质上记录和/或再现信息的光学拾取装置包括发射光束的光源，聚光光学系统以会聚从光源发射的光束，具有耦合光学系统，其改变 从光源发射的光束的发散角和将从耦合光学系统出射的光束会聚在光学信息记录介质的信息记录表面上的物镜光学系统，以及用于检测反射光的光学检测器或 来自光信息记录介质的信息记录表面的透射光。 在光拾取装置中，耦合光学系统的至少一个表面设置有衍射面，通过该衍射面，在具有与规定波长的光的波长不同的波长的光具有规定的波长差异的情况下， 通过耦合光学系统进入物镜光学系统被制成更小，与将波长不同于波长的波长的光进入物镜光学系统的情况相比，与纵向球面像差相比较 。

公开(公告)号：US4889417A

公开(公告)日：1989-12-26

申请号：US833342

申请日：1986-02-25

申请人： Norikazu Arai

发明人： Norikazu Arai

IPC分类号： G02B1/06 ,  G02B13/16 ,  G02B13/18

CPC分类号： G02B13/16 ,  G02B1/06 ,  G02B13/18

摘要： A projection lens for a three-tube television projector of the type in which three CRT's of blue, green and red are projected on the screen. The projection lens comprises a plastic first lens having an extremely small refracting power, a glass second lens, a plastic third lens and a plastic fourth lens disposed immediately before a face plate of CRT. There are large spaces between the first lens and the second lens and between the third lens and the fourth lens so that reflecting mirrors may respectively be arranged therebetween. For reducing the cost, the fourth lens can be formed from a liquid lens filled with a liquid between a thin-wall shell and a face plate.

摘要翻译： 一种用于三屏电视投影仪的投影透镜，其中三个CRT的蓝色，绿色和红色投影在屏幕上。 投影透镜包括具有非常小的折射力的塑料第一透镜，玻璃第二透镜，塑料第三透镜和刚好在CRT的面板之前设置的塑料第四透镜。 在第一透镜和第二透镜之间以及第三透镜和第四透镜之间存在大的空间，使得反射镜可以分别布置在它们之间。 为了降低成本，第四透镜可以由在薄壁壳和面板之间填充有液体的液体透镜形成。