公开(公告)号：US07800834B2

公开(公告)日：2010-09-21

申请号：US11892120

申请日：2007-08-20

申请人： Tetsuya Ori

发明人： Tetsuya Ori

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： A zoom lens is provided and includes: in order from an object side thereof, a first lens group having a negative refractive power, a stop; a second lens group having a positive refractive power; and a third lens group having a positive refractive power. The magnification of the zoom lens is varied from a wide angle end to a telephoto end by changing a space between the first lens group and the second lens group and a space between the second lens group and the third lens group. The first lens group includes: in order from an object side thereof, a negative lens having at least one aspherical surface and having a concave surface on an image side thereof; and a positive meniscus lens having a convex surface on the object side thereof. The zoom lens satisfies conditional expressions specified in the specification.

摘要翻译： 提供了一种变焦透镜，包括：从物体侧起依次具有负屈光力的第一透镜组，止挡部; 具有正屈光力的第二透镜组; 以及具有正屈光力的第三透镜组。 通过改变第一透镜组和第二透镜组之间的空间以及第二透镜组和第三透镜组之间的空间，变焦透镜的放大倍率从广角端到远摄端变化。 第一透镜组包括：从物体侧开始依次具有至少一个非球面并且在其一侧具有凹面的负透镜; 以及在其物体侧具有凸面的正弯月形透镜。 变焦镜头满足本说明书中规定的条件式。

公开(公告)号：US07630138B2

公开(公告)日：2009-12-08

申请号：US12051672

申请日：2008-03-19

申请人： Tetsuya Ori

发明人： Tetsuya Ori

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： A variable-power optical system includes, in order from an object side, first to fifth lens groups. The first and third lens groups are fixed at a time of varying magnification and at a time of focusing. The second, fourth and fifth lens groups are movable at the time of varying magnification. The first, third and fourth lens groups have positive refractive powers. The second and fifth lens groups have negative refractive powers. The fourth lens group has a focusing function. The following conditional expressions are satisfied. 0.4

摘要翻译： 可变功率光学系统从物体侧依次包括第一至第五透镜组。 第一和第三透镜组在变焦放大时和聚焦时固定。 第二，第四和第五透镜组在变化的放大倍数时是可移动的。 第一，第三和第四透镜组具有正折射光焦度。 第二和第五透镜组具有负折光力。 第四透镜组具有聚焦功能。 满足以下条件表达式。 0.4fw / f1 0.5f2 / fw | 其中fw表示整个系统在宽端的焦距，f1表示第一透镜组的焦距，f2表示第二透镜组的焦距。

公开(公告)号：US07298687B2

公开(公告)日：2007-11-20

申请号：US10874388

申请日：2004-06-24

申请人： Yu Kitahara ,  Toshiaki Katsuma ,  Tetsuya Ori

发明人： Yu Kitahara ,  Toshiaki Katsuma ,  Tetsuya Ori

IPC分类号： G11B11/00

CPC分类号： G11B7/139 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical recording media objective lens is disclosed for converging either of two working lights of a first wavelength or a second wavelength. The working light of the first wavelength is converged at a first numerical aperture onto the first optical recording medium and the working light of the second wavelength is converged at a second numerical aperture onto the second optical recording medium. An aperture adjusting zonal part is included on at least one of the objective lens surfaces for apparently eliminating light at the periphery of a light flux having a wavelength λ1 while maintaining light at the periphery of a light flux having a wavelength λ2, where λ1 is one of the first and second wavelengths and λ2 is the other wavelength. The aperture adjusting zonal part is formed so as to satisfy two conditions.

摘要翻译： 公开了用于会聚第一波长或第二波长的两个工作光中的任一个的光学记录介质物镜。 第一波长的工作光在第一光学记录介质上会聚在第一数值孔径，第二波长的工作光在第二数值孔径处会聚在第二光学记录介质上。 在至少一个物镜表面上包括孔径调节区带部分，用于明显地消除具有波长λ1的光束周围的光，同时保持具有 波长λ2，其中λ1是第一和第二波长中的一个，λ2是另一个波长。 孔径调节区域形成为满足两个条件。

公开(公告)号：US20060098555A1

公开(公告)日：2006-05-11

申请号：US11267513

申请日：2005-11-07

申请人： Toshiaki Katsuma ,  Yu Kitahara ,  Masao Mori ,  Tetsuya Ori

发明人： Toshiaki Katsuma ,  Yu Kitahara ,  Masao Mori ,  Tetsuya Ori

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/1369 ,  G11B7/1374 ,  G11B2007/0006

摘要： An objective optical system focuses light from a light source onto at least two different types of optical recording media having different substrate thicknesses in order to record or reproduce information on the optical recording media by using a variable refractive power element and an objective lens. The variable refractive power element may be a liquid crystal element with concentric zones that serves as a transparent plate having no convergence effect when no voltage is applied when selecting an AOD, DVD, or CD and as a converging lens when a voltage is applied when selecting a BD. Alternately, the variable refractive power element may electrically vary the refractive index of a nanoparticle dispersion or at least one liquid of a two-liquid lens element. A diffractive optical element may be used to assist in focusing light to four recording media. An optical pickup device includes the objective optical system.

公开(公告)号：US20050259554A1

公开(公告)日：2005-11-24

申请号：US11128279

申请日：2005-05-13

申请人： Toshiaki Katsuma ,  Masao Mori ,  Tetsuya Ori ,  Yu Kitahara

发明人： Toshiaki Katsuma ,  Masao Mori ,  Tetsuya Ori ,  Yu Kitahara

IPC分类号： G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An objective optical system is formed of a diffractive optical element with a diffractive surface formed on a planar ‘virtual surface’ (i.e., a surface that would be planar but for the diffractive structure) and an objective lens for focusing three collimated light beams of three different wavelengths at three different numerical apertures onto desired positions of three different recording media with substrates of different thicknesses, such as an AOD, a DVD, and a CD, that introduce different amounts of spherical aberration in the focused beams. The objective optical system provides compensating spherical aberration to the three light beams while keeping equal the distance between the diffractive optical element and the objective lens, and focuses second-order diffracted light of one wavelength and first-order diffracted light of the other two wavelengths. An optical pickup device includes the objective optical system, the recording media, and a light source supplying the three light beams.

摘要翻译： 物镜光学系统由具有衍射面的衍射光学元件形成，该衍射面形成在平面“虚拟表面”（即，对于衍射结构为平面的表面）和用于聚焦三个准直光束的物镜 不同波长的三个不同数值孔径到具有不同厚度的衬底（例如AOD，DVD和CD）的三种不同记录介质的所需位置，其在聚焦光束中引入不同量的球面像差。 物镜光学系统对三个光束提供补偿球面像差，同时保持衍射光学元件和物镜之间的距离相等，并且聚焦一个波长的二次衍射光和另外两个波长的一次衍射光。 光拾取装置包括物镜光学系统，记录介质和提供三个光束的光源。

公开(公告)号：US20050105448A1

公开(公告)日：2005-05-19

申请号：US10988638

申请日：2004-11-16

申请人： Yu Kitahara ,  Toshiaki Katsuma ,  Masao Mori ,  Tetsuya Ori

发明人： Yu Kitahara ,  Toshiaki Katsuma ,  Masao Mori ,  Tetsuya Ori

IPC分类号： G02B5/18 ,  G02B13/00 ,  G02B13/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1392 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

摘要： An objective lens is formed as an objective lens element with a diffractive surface on one side. The objective lens focuses a collimated light beam of a first wavelength diffracted by the objective lens onto a first recording medium, a collimated light beam of a second wavelength diffracted by the objective lens onto a second recording medium, and a diverging light beam of a third wavelength diffracted by the objective lens onto a third recording medium. The three light beams are focused at three different working distances from the objective lens and the diffraction orders of the diffracted light of two of the light beams is the same. The objective lens satisfies certain conditions related to the shortest of the three different working distances, the focal length of the objective lens element at the shortest of the three wavelengths, and the thickness of the objective lens.

摘要翻译： 物镜形成为在一侧具有衍射面的物镜元件。 物镜将由物镜衍射的第一波长的准直光束聚焦到第一记录介质上，将由物镜衍射的第二波长的准直光束聚焦到第二记录介质上，并将第三波长的发散光束 波长由物镜衍射到第三记录介质上。 三个光束聚焦在与物镜三个不同的工作距离处，两个光束的衍射光的衍射级相同。 物镜满足与三个不同工作距离中最短的物体相关的某些条件，三个波长中最短的物镜的焦距和物镜的厚度。

公开(公告)号：US20050041560A1

公开(公告)日：2005-02-24

申请号：US10922958

申请日：2004-08-23

申请人： Toshiaki Katsuma ,  Yu Kitahara ,  Tetsuya Ori ,  Masao Mori

发明人： Toshiaki Katsuma ,  Yu Kitahara ,  Tetsuya Ori ,  Masao Mori

IPC分类号： G02B5/18 ,  G02B13/00 ,  G11B7/00 ,  G11B7/135

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

摘要： An objective lens consists of two lens elements of different materials that are cemented. The lens surfaces that are cemented includes a phase function so that the cemented surface forms a optical diffractive surface that enables the objective lens to focus incident light of three different wavelengths with different numerical apertures onto different optical recording media. Three conditions are satisfied so as to achieve optimum imaging. The optical diffractive surface may be shaped so that the order of the diffracted light of the shortest wavelength λ1 having the largest diffracted intensity is different from the order of the diffracted light of the second wavelength λ2 having the largest diffracted intensity, and the order of the diffracted light of the first wavelength λ1 having the largest diffracted intensity is also different from the order of the diffracted light of the third wavelength λ3 having the largest diffracted intensity.

摘要翻译： 物镜由两种胶合的不同材料的透镜元件组成。 胶合的透镜表面包括相位功能，使得胶合表面形成光学衍射表面，使得物镜能够使具有不同数值孔径的三种不同波长的入射光聚焦到不同的光学记录介质上。 满足三个条件以实现最佳成像。 光学衍射面可以被成形为具有最大衍射强度的最短波长λ1的衍射光的次序与具有最大衍射强度的第二波长λ2的衍射光的次序不同，并且 具有最大衍射强度的第一波长λ1的衍射光也与具有最大衍射强度的第三波长λ3的衍射光的次数不同。

公开(公告)号：US06785057B2

公开(公告)日：2004-08-31

申请号：US10609368

申请日：2003-07-01

申请人： Tetsuya Ori

发明人： Tetsuya Ori

IPC分类号： G02B1514

CPC分类号： G02B15/177

摘要： A three-group zoom lens includes, in order from the object side, a first lens group of negative refractive power, and second and third lens groups, each of positive refractive power. The first and second lens groups include negative and positive components and the third lens group is a single lens component. All but one lens component may be a single lens element. When zooming from the wide-angle end to the telephoto end, the first and second lens groups move closer together while the second lens group moves farther from the third lens group. The third lens group remains stationary during zooming but moves for focusing. The second lens group includes a diaphragm on its object side. Aspheric lens surfaces are disclosed. The zoom lens satisfies certain conditions for the focal lengths of the zoom lens and a component of the zoom lens, and for Abbe numbers of two lens elements.

公开(公告)号：US06654180B2

公开(公告)日：2003-11-25

申请号：US10339295

申请日：2003-01-10

申请人： Tetsuya Ori

发明人： Tetsuya Ori

IPC分类号： G02B1514

CPC分类号： G02B15/177

摘要： A three-group zoom lens includes, in order from the object side, a first lens group of negative refractive power, and second and third lens groups, each of positive refractive power. The first and second lens groups include negative and positive components and the third lens group is a single lens component. All the lens components may be single lens elements. When zooming from the wide-angle end to the telephoto end, the second and third lens groups move toward the object side and all three lens groups move such that the group spacings decrease. The second lens group includes a diaphragm on its object side. A constant axial spacing between the second and third lens groups is maintained when zooming while the zoom lens is focused at infinity, and the third lens group is moved toward the object side when focusing from infinity to a near point.

公开(公告)号：US06570696B2

公开(公告)日：2003-05-27

申请号：US09974381

申请日：2001-10-10

申请人： Tetsuya Ori

发明人： Tetsuya Ori

IPC分类号： G02B2608

CPC分类号： G02B26/125

摘要： An optical system and optical scanning apparatus can form a minute beam spot and big size images. The optical scanning apparatus deflects a beam with a polygon mirror, and focuses the beam on a target surface through a f&thgr;-lens, a cylindrical lens, and a cylindrical mirror. The scanning stroke on the target surface is longer than 500 mm, and the incident angle in the sub-scan direction of the incident light into the cylindrical mirror is 15 degrees or less. The ratio of the beam size DX in the sub-scan direction of the incident light into the cylindrical mirror to the distance DL between the cylindrical mirror and the target surface satisfies 0.03