公开(公告)号：US5831773A

公开(公告)日：1998-11-03

申请号：US753476

申请日：1996-11-26

Applicant: Haruo Sato

Inventor： Haruo Sato

IPC: G02B15/177 ,  G02B15/14 ,  G02B3/02 ,  G02B9/62

CPC classification number: G02B15/177

Abstract: A zoom lens system of compact size having a small number of lenses and a large field area is provided, comprising, in the following order from the object side, a first lens group G1 with a negative refractive power and a second lens group G2 with a positive refractive power, wherein zooming is executed by changing dead space between lens groups G1 and G2. The first lens group G1 comprises, in the following order from the object side, a first lens group front group G.sub.1F with a negative refractive power, and a first lens group rear group G.sub.1R with either a negative refractive power or a positive refractive power having at least one set of color erasable negative lens components L.sub.n and positive lens components L.sub.p. Focusing is executed by moving only front group G.sub.1F. For increased field angle, the first lens group G1 comprises a first subgroup L11 having a negative refractive power formed in a meniscus shape with a concave surface facing the image side, a second subgroup L12 with a negative refractive power having a cemented negative lens assembly with a negative lens and a positive lens cemented, and a third subgroup L13 having a positive refractive power with a convex side facing the object side.

Abstract translation: 提供了具有少量透镜和大场区的紧凑尺寸的变焦透镜系统，其从物体侧按照以下顺序具有负折光力的第一透镜组G1和具有负折射光焦度的第二透镜组G2 正屈光力，其中通过改变透镜组G1和G2之间的死区来执行变焦。 第一透镜组G1从物体侧按照以下顺序包括具有负折光力的第一透镜组前组G1F和具有负折射光焦度或正折射光焦度的第一透镜组后组G1R 至少一组彩色可擦除负透镜部件Ln和正透镜部件Lp。 通过仅移动前组G1F执行对焦。 对于增大的场角，第一透镜组G1包括具有凹凸表面朝向像侧的弯月面形状的负折光力的第一子组L11，具有负屈光力的第二子组L12具有胶结负透镜组件， 胶合了负透镜和正透镜，以及具有朝向物侧的凸面的正屈光力的第三子组L13。

公开(公告)号：US5793536A

公开(公告)日：1998-08-11

申请号：US636947

申请日：1996-04-24

Applicant: Haruo Sato

Inventor： Haruo Sato

IPC: G02B13/18 ,  G02B15/16 ,  G02B15/177 ,  G02B15/20 ,  G02B15/14 ,  G02B3/02

CPC classification number: G02B15/177

Abstract: In a zoom lens having a negative lens unit and a positive lens unit, a first lens unit G1 has, in succession from the object side, a first negative meniscus lens component L11 having its concave surface facing the image side, a second negative lens component L12 and a third positive lens component L13 having a convex surface facing the object side, a second lens unit G2 has, in succession from the object side, a first positive lens component L21, a second positive lens component L22, a third negative lens component L23 and a fourth positive lens component L24 separated from one another, at least one of the lens surfaces of the first negative meniscus lens component L11 and second negative lens component L12 in the first lens unit G1 is formed into an aspherical shape, and predetermined conditional expressions are satisfied.

Abstract translation: 在具有负透镜单元和正透镜单元的变焦透镜中，第一透镜单元G1从物侧连续地具有其凹面朝向像侧的第一负弯月形透镜部件L11，第二负透镜部件 L12和具有面向物体侧的凸面的第三正透镜部件L13，第二透镜单元G2从物侧连续地具有第一正透镜部件L21，第二正透镜部件L22，第三负透镜部件 L23和第四正透镜部件L24彼此分离，第一透镜单元G1中的第一负弯月透镜部件L11和第二负透镜部件L12的透镜表面中的至少一个形成为非球面形状，并且预定条件 表情满意

公开(公告)号：US5734508A

公开(公告)日：1998-03-31

申请号：US857085

申请日：1997-05-15

Applicant: Haruo Sato

Inventor： Haruo Sato

IPC: G02B13/18 ,  G02B15/173 ,  G02B15/20 ,  G02B15/14

CPC classification number: G02B15/173

Abstract: A compact, very-wide angle, high zoom-ratio zoom lens suitable for high-performance imaging use with a motion picture or still camera is disclosed. The zoom lens provides an image of an object over a continuous range of magnification from a wide-angle mode to a telephoto mode. The zoom lens comprises, coaxially objectwise to imagewise, a first lens group having positive refractive power, a second lens group having negative refractive power, and a third lens group having positive refractive power. Each lens group is axially movable for zooming, and the second lens group is also axially movable for focusing. Each lens group preferably includes multiple lens elements, wherein each of the second and third lens groups preferably includes an aspheric lens element. The lens elements in the third lens group are disposed in a front and a rear lens group both having positive refracting power and both being independently axially movable for zooming. The lens exhibits a zooming ratio of at least 5-fold and a maximal field angle in the wide-angle mode of at least 80.degree.. An aperture stop is preferably disposed objectwise of the third lens group. The zoom lens preferably satisfies one or more specific performance conditions.

Abstract translation: 公开了一种适用于运动图像或静态照相机的高性能成像使用的紧凑，非常广角度，高变焦倍率变焦镜头。 变焦镜头在从广角模式到长焦模式的连续放大范围内提供对象的图像。 变焦透镜包括与成像方向同向的具有正屈光力的第一透镜组，具有负屈光力的第二透镜组和具有正折光力的第三透镜组。 每个透镜组可轴向移动以进行变焦，并且第二透镜组也可轴向移动以进行聚焦。 每个透镜组优选地包括多个透镜元件，其中第二透镜组和第三透镜组中的每一个优选地包括非球面透镜元件。 第三透镜组中的透镜元件设置在前透镜组和后透镜组中，两者均具有正折射力并且两者可独立地轴向移动以用于变焦。 透镜在广角模式下呈现至少为5倍的变焦倍率和最大视场角，至少80°。 孔径光阑优选地朝向第三透镜组的物体方向设置。 变焦镜头优选地满足一个或多个特定的性能条件。

公开(公告)号：US5631780A

公开(公告)日：1997-05-20

申请号：US275417

申请日：1994-07-15

Applicant: Haruo Sato

Inventor： Haruo Sato

IPC: G02B13/04 ,  G02B13/06 ,  G02B13/18

CPC classification number: G02B13/06 ,  G02B13/04

Abstract: A retrofocus type wide-angle lens for achieving a highly stable imaging performance and a reduction in spherical aberrations, astigmatism, and coma, while allowing for a large aperture and a large wide angle of view. The retrofocus type wide-angle lens has, in the following order from an object side, a first lens group having a negative refracting power and being fixed in a focusing operation and a second lens group having a positive refracting power and being moved in the focusing operation. The first lens group has, in the following order from the object side, a first unit with a negative refracting power and a second unit having a positive refracting power. The second lens group has, in the following order from the object side, a first unit with a negative refracting power, a second unit with a positive refracting power, a third unit with a negative refracting power and a fourth unit with a positive refracting power. The third unit of the second lens group having a cemented lens formed of a lens with a negative refracting power and a lens with a positive refracting power, the cemented lens constituting a negative meniscus lens with a convex surface directed to an image side.

Abstract translation: 一种用于实现高度稳定的成像性能和减少球面像差，散光和彗差的反向焦点型广角镜头，同时允许大的孔径和大的广角视角。 后焦点型广角镜具有从物体侧起的顺序，具有负折射力并被固定在聚焦操作中的第一透镜组和具有正折射能并在聚焦中移动的第二透镜组 操作。 第一透镜组从物体侧按照以下顺序具有负折射力的第一单元和具有正折射率的第二单元。 第二透镜组从物体侧按照以下顺序具有负折射力的第一单元，具有正折射率的第二单元，具有负折射率的第三单元和具有正折射率的第四单元 。 第二透镜组的第三单元具有由具有负折射率的透镜和具有正折射率的透镜形成的胶合透镜，该胶合透镜构成具有指向图像侧的凸表面的负弯月形透镜。

公开(公告)号：US5381268A

公开(公告)日：1995-01-10

申请号：US24221

申请日：1993-03-01

Applicant: Haruo Sato

Inventor： Haruo Sato

IPC: G02B13/18 ,  G02B15/16 ,  G02B15/177 ,  G02B15/14

CPC classification number: G02B15/177

Abstract: A wide angle zoom lens comprises a first lens group having a negative overall refracting power and a second lens group having a positive overall refracting power disposed in the named order from the object side, in which a magnification change is carried out by changing an air gap between the two lens groups. The first lens group comprises a negative meniscus lens convex on the object side and a positive lens convex on the object side disposed in the named order from the object side. The negative meniscus lens has at least one aspherical surface thereon. The second lens group comprises at least a positive lens, a positive lens, a negative lens having a concave surface with a large curvature on the image side, and a positive lens. The wide angle zoom lens is arranged to satisfy various conditions.

Abstract translation: 广角变焦镜头包括具有负整体折射力的第一透镜组和具有从物体侧按命名顺序设置的正整体折射光焦度的第二透镜组，其中通过改变气隙来进行放大率改变 在两个镜头组之间。 第一透镜组包括在物体侧凸起的负弯月形透镜和从物体侧以指定顺序设置的物体侧凸起的正透镜。 负弯月透镜在其上具有至少一个非球面。 第二透镜组至少包括正透镜，正透镜，具有在图像侧具有大曲率的凹面的负透镜和正透镜。 广角变焦镜头被设置为满足各种条件。