公开(公告)号：US06775064B2

公开(公告)日：2004-08-10

申请号：US09918440

申请日：2001-08-01

申请人： Koichi Maruyama

发明人： Koichi Maruyama

IPC分类号： G02B518

CPC分类号： G02B5/1895 ,  G02B5/1876 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

摘要： The objective lens is a biconvex plastic lens having first and second surfaces which are both aspheric. The objective lens is divided into an inside area which is inside of a circle of an effective diameter of the objective lens and an outside area which is outside of the circle of the effective diameter. A diffractive lens structure having a plurality of concentric ring-shaped steps is formed in the inside area. A surface of the outside area is continuous with no steps and corresponds to a macroscopic base curve of the inside area. The objective lens has a gap of a spherical aberration between the inside area and the outside area.

摘要翻译： 物镜是具有非球面的第一和第二表面的双凸透镜塑料透镜。 物镜被分成在物镜的有效直径的圆的内侧的内侧区域和位于有效直径的圆的外侧的外部区域。 在内部区域中形成具有多个同心环状台阶的衍射透镜结构。 外部区域的表面是连续的，没有步骤，对应于内部区域的宏观基础曲线。 物镜在内部区域和外部区域之间具有球面像差的间隙。

公开(公告)号：US06741402B2

公开(公告)日：2004-05-25

申请号：US09973114

申请日：2001-10-10

申请人： Shuichi Takeuchi ,  Koichi Maruyama

发明人： Shuichi Takeuchi ,  Koichi Maruyama

IPC分类号： G02B308

CPC分类号： G02B27/4283 ,  G02B7/028 ,  G02B27/0037 ,  G02B27/4288 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： A single element objective lens for an optical disc drive converges a laser beam, which is emitted by a laser source, on a data recording surface of an optical disc through a protective layer of the optical disc. One surface of the objective lens is divided into a central area including an optical axis thereof and a peripheral area surrounding the central area. The peripheral area is provided with a diffraction lens structure formed by a plurality of concentric annular zones including minute steps. The central area is a continuous surface having no stepped portions. The diffraction lens structure compensates for variation of converging characteristic of the objective lens due to a change of a temperature.

摘要翻译： 用于光盘驱动器的单个元件物镜将由激光源发射的激光束通过光盘的保护层会聚在光盘的数据记录表面上。 物镜的一个表面被分成包括其光轴的中心区域和围绕中心区域的周边区域。 周边区域设置有由包括微小步骤的多个同心环形区域形成的衍射透镜结构。 中心区域是没有阶梯部分的连续表面。 衍射透镜结构由于温度的变化而补偿物镜的会聚特性的变化。

公开(公告)号：US06594222B2

公开(公告)日：2003-07-15

申请号：US09747969

申请日：2000-12-27

申请人： Koichi Maruyama

发明人： Koichi Maruyama

IPC分类号： G11B700

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

摘要： Disclosed is an objective lens of an optical pick-up that includes a refractive lens and a diffractive lens structure that is formed as a large number of concentric ring areas having minute steps in an optical axis direction at the boundaries therebetween. The lens surface of the objective lens is divided into a high NA exclusive area for a DVD only, and a common area that is surrouned by the high NA exclusive area. The diffractive lens structure in the common area changes the spherical aberration in the undercorrected direction as the wavelength of the incident laser beam increases. The diffractive lens structure formed in the high NA exclusive area has a smaller wavelength dependence of a spherical aberration than that formed in the common area, and is designed such that a spherical aberration at the short wavelength is adequately corrected for the thin cover type optical disc.

摘要翻译： 公开了一种光学拾取器的物镜，其包括折射透镜和衍射透镜结构，该折射透镜和衍射透镜结构形成为在其间的边界处沿光轴方向具有微小阶梯的多个同心圆环区域。 物镜的透镜表面被分成仅用于DVD的高NA专用区域和由高NA专属区域所淹没的公共区域。 公共区域中的衍射透镜结构随着入射激光束的波长增加而改变校正不正确的方向上的球面像差。 形成在高NA专用区域中的衍射透镜结构具有比在公共区域中形成的球面像差更小的波长依赖性，并且被设计成使得对于薄盖型光盘来适当地校正短波长的球面像差 。

公开(公告)号：US06344935B1

公开(公告)日：2002-02-05

申请号：US09517576

申请日：2000-03-02

申请人： Koichi Maruyama

发明人： Koichi Maruyama

IPC分类号： G02B300

CPC分类号： G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B2007/0006

摘要： An optical system of an optical pick-up that is capable of using optical discs DVD and CD. The system includes a light source portion for selectively emitting a first laser beam (650 nm) and a second laser beam (780 nm), and an objective lens for converging the laser beam from the light source portion onto an recording layer of the optical disc. The objective lens is provided with a transmittance controlling phase grating in a peripheral region to have a wavelength dependence such that the transmittance for the first laser beam is higher than the transmittance for the second laser beam. The transmittance controlling phase grating is formed as a plurality of concentric grooves. Each of the grooves has a rectangular cross-section in a plane containing an optical axis of the objective lens.

摘要翻译： 能够使用光盘DVD和CD的光学拾取器的光学系统。 该系统包括用于选择性地发射第一激光束（650nm）和第二激光束（780nm）的光源部分和用于将来自光源部分的激光束会聚到光盘的记录层上的物镜 。 物镜在周边区域设置有透射率控制相位光栅以具有波长依赖性，使得第一激光束的透射率高于第二激光束的透射率。 透射率控制相位光栅形成为多个同心凹槽。 每个凹槽在包含物镜的光轴的平面中具有矩形横截面。

公开(公告)号：US6115175A

公开(公告)日：2000-09-05

申请号：US577160

申请日：1995-12-22

申请人： Koichi Maruyama ,  Makoto Iwaki ,  Syunitirou Wakamiya ,  Shigeo Kubota ,  Hiroshi Suganuma ,  Minoru Takeda

发明人： Koichi Maruyama ,  Makoto Iwaki ,  Syunitirou Wakamiya ,  Shigeo Kubota ,  Hiroshi Suganuma ,  Minoru Takeda

IPC分类号： G02B13/14 ,  G02B13/24 ,  G03F7/20 ,  H01L21/027 ,  G01B11/00 ,  G02B11/00

CPC分类号： G03F7/70241 ,  G02B13/143

摘要： A UV image forming optical system includes a collimating lens for collimating light emitted from a UV light source, an imaging lens for forming an image of the collimated light transmitted through the collimating lens, and a beam splitting optical system positioned in an optical path of the collimated light between the collimating lens and the imaging lens. At least one of the collimated light emitted from the collimating lens and the light transmitted through the imaging lens, reflected by a reflector and transmitted again through the imaging lens is made incident upon an external viewing optical system.

摘要翻译： UV图像形成光学系统包括用于准直从UV光源发射的光的准直透镜，用于形成通过准直透镜透射的准直光的图像的成像透镜，以及位于所述准直透镜的光路中的分束光学系统 准直透镜与成像透镜之间的准直光。 从准直透镜发射的准直光中的至少一个和透过成像透镜的光被反射器反射并再次透过成像透镜，被入射到外部观察光学系统上。

公开(公告)号：US5838497A

公开(公告)日：1998-11-17

申请号：US801459

申请日：1997-02-18

申请人： Koichi Maruyama

发明人： Koichi Maruyama

IPC分类号： G02B3/04 ,  G02B3/08 ,  G02B5/18 ,  G02B27/00 ,  G11B7/135

CPC分类号： G02B5/1895 ,  G02B27/0037 ,  G02B27/4238 ,  G02B3/04 ,  G02B3/08 ,  G02B5/1876 ,  G11B7/1353 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/1378

摘要： A chromatic aberration correcting element that is a simple lens having at least one aspheric surface, the radius of curvature of which increases from the optical axis toward the periphery. At least one of the surfaces is formed as a diffraction lens surface that consists of annular segments that shift discretely in a direction in which the lens thickness increases as a function of the distance from the optical axis. Also disclosed is a chromatic aberration correcting device having annular segments formed in steps on either a light entrance face or a light exit face or both. The annular segments are composed of planes perpendicular to and concentric with the optical axis.

摘要翻译： 一种色差补偿元件，其是具有至少一个非球面的简单透镜，其曲率半径从光轴向周边增加。 至少一个表面形成为衍射透镜表面，该衍射透镜表面由沿着透镜厚度随距离光轴的距离的函数而沿透镜厚度增加的方向离散地移位的环形部分组成。 还公开了一种色差校正装置，其具有在光入射面或光出射面或两者上均匀地形成的环状部分。 环形段由与光轴垂直并与光轴同心的平面组成。

公开(公告)号：US5838496A

公开(公告)日：1998-11-17

申请号：US703660

申请日：1996-08-27

申请人： Koichi Maruyama ,  Junji Kamikubo

发明人： Koichi Maruyama ,  Junji Kamikubo

IPC分类号： G02B5/18 ,  G02B27/44

CPC分类号： G02B5/1895 ,  G02B5/1814 ,  G02B5/1876

摘要： A diffractive multi-focal objective lens formed, macroscopically, as a double convex lens having convex aspherical surfaces of which radii of curvatures are larger as a function of distance from the optical axis. One lens surface is provided with a microscopic diffractive lens construction that is formed as ring zones concentric about the optical axis. The diffractive lens construction is designed so that the higher the diffractive order, the shorter the focal length. For example, a first order diffractive light beam forms a first focal point F1 on the optical axis, and a second order diffractive light beam forms a second focal point F2 on the optical axis that is nearer to the lens than the first focal point F1.

摘要翻译： 在宏观上，形成为具有凸起的非球面的双凸透镜的衍射多焦点物镜，其中半径的曲率随距离光轴的距离而变大。 一个透镜表面设置有形成为围绕光轴同心的环形区域的微观衍射透镜结构。 衍射透镜结构被设计成使得衍射级越高，焦距越短。 例如，一阶衍射光束在光轴上形成第一焦点F1，二次衍射光束在比第一焦点F1更靠近透镜的光轴上形成第二焦点F2。

公开(公告)号：US5629799A

公开(公告)日：1997-05-13

申请号：US91983

申请日：1993-07-16

申请人： Koichi Maruyama ,  Masahiro Oono ,  Satoru Tachihara ,  Masato Noguchi ,  Tsuyoshi Ishikawa

发明人： Koichi Maruyama ,  Masahiro Oono ,  Satoru Tachihara ,  Masato Noguchi ,  Tsuyoshi Ishikawa

IPC分类号： G02B3/04 ,  G02B3/08 ,  G02B5/18 ,  G02B27/00 ,  G11B7/135

CPC分类号： G02B5/1895 ,  G02B27/0037 ,  G02B27/4238 ,  G02B3/04 ,  G02B3/08 ,  G02B5/1876 ,  G11B7/1353 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/1378

摘要： A chromatic aberration correcting element that is a simple lens having at least one aspheric surface the radius of curvature of which increases from the optical axis toward the periphery, at least either one of the surfaces being formed as a diffraction lens surface that consists of annular segments in steps that are shifted discretely in a direction in which the lens thickness increases as a function of the distance from the optical axis. Also, a chromatic aberration correcting device having annular segments formed in steps on either a light entrance face or a light exit face or both, the annular segments being composed of planes perpendicular to and concentric with the optical axis.

摘要翻译： 一种色像差校正元件，其是具有至少一个非球面的透镜，所述至少一个非球面的曲率半径从光轴朝向周边增加，所述表面中的至少一个形成为衍射透镜表面，所述衍射透镜表面由环形段 沿着透镜厚度随距离光轴的距离的函数的方向离散地移位的步骤。 另外，具有在光入射面或光出射面或两者上均匀地形成的环状部分的色像差校正装置，环形部分由与光轴垂直并与光轴同心的平面构成。

公开(公告)号：US5600494A

公开(公告)日：1997-02-04

申请号：US571514

申请日：1995-12-13

申请人： Wataru Kubo ,  Koichi Maruyama ,  Suguru Takishima

发明人： Wataru Kubo ,  Koichi Maruyama ,  Suguru Takishima

IPC分类号： G02B13/18 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G02B13/18 ,  G11B7/13922 ,  G11B2007/13727

摘要： An objective lens system used in an optical system of an optical disk device. The objective lens system includes at least one lens element and converges light emitted from a light source onto a reflecting layer of an optical disk. The lens element has an offense against the sine condition OSC, and the optical disk has a substrate thickness T and a refractive index n. A ray of light exits the lens element and intersects an optical axis of the lens element at an angle .alpha.. The values of OSC, .alpha., n and T satisfy the following relationship for light rays that are incident on the objective lens system at distances from the optical axis of the objective lens system which are least equal to a predetermined percentage of an effective height of an aperture of the objective lens: ##EQU1## Accordingly, a spherical aberration of the optical system is corrected. An offense against the sine condition of only the objective lens is substantially coincident with a spherical aberration of the objective lens such that a coma of only the objective lens is corrected.

摘要翻译： 一种用于光盘装置的光学系统的物镜系统。 物镜系统包括至少一个透镜元件，并且将从光源发射的光会聚到光盘的反射层上。 透镜元件具有针对正弦条件OSC的挑战，并且光盘具有基板厚度T和折射率n。 光线离开透镜元件并以角度α与透镜元件的光轴相交。 OSC，α，n和T的值对于距离物镜系统的光轴入射到物镜系统的光线满足以下关系：最小等于预定百分比的有效高度 物镜的孔径：因此，校正光学系统的球面像差。 仅针对物镜的正弦状态的进攻基本上与物镜的球面像差一致，使得仅修正了物镜的彗差。

公开(公告)号：US5519538A

公开(公告)日：1996-05-21

申请号：US141124

申请日：1993-10-21

申请人： Koichi Maruyama

发明人： Koichi Maruyama

IPC分类号： G02B7/10 ,  G02B15/16 ,  G03B5/00 ,  G03B17/00 ,  G02B15/14 ,  G02B27/64

CPC分类号： G02B15/16

摘要： A zoom lens including at least two lens groups which move relative to one another in an optical axis direction to change the focal length of the zoom lens, wherein during the zooming operation in which the relative movement of the lens groups occurs to move the lens system in the telephoto direction, the lens group that is located closest to the image side of the zoom lens is advanced towards an object side, and a deflector which is provided closer to the image side than the lens group closest to the image side is externally driven to deflect a light flux of the zoom lens.

摘要翻译： 一种变焦透镜，包括至少两个透镜组，所述至少两个透镜组在光轴方向上相对于彼此移动，以改变变焦透镜的焦距，其中在发生透镜组的相对运动以使透镜系统移动的变焦操作期间 在远摄方向上，位于最接近变焦透镜的像侧的透镜组朝向物体侧前进，并且设置在比靠近像侧的透镜组更靠近像侧的偏转器被外部驱动 以偏转变焦透镜的光通量。