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1. 发明授权

US08248716B2 Imaging optical system, and imaging apparatus incorporating the same 有权
标题翻译：成像光学系统和包含该成像装置的成像装置
公开(公告)号：US08248716B2
公开(公告)日：2012-08-21
申请号：US12925470
申请日：2010-10-21
申请人： Kazuteru Kawamura , Keitaro Yokoyama
发明人： Kazuteru Kawamura , Keitaro Yokoyama
IPC分类号： G02B9/06
CPC分类号： G02B7/04 , G02B9/04
摘要： An imaging optical system has, in order from the object side to the image side thereof, a front lens group, an aperture stop, and a rear lens group. A lens located closest to object side in said front lens group always remains fixed in position, with satisfaction of the following conditions (1) and (2): 1.15≦fb/IHω≦1.7 (1) −4.0≦fn/f≦−1.3 (2) where f is a focal length of the whole imaging optical system, fn is a focal length of a first negative lens in said front lens group, fb is a back focus of the imaging optical system upon focusing on an object point at infinity, and IHω is a distance from an optical axis of a position where a chief ray from a maximum incident half angle of view (ω) upon focusing on an object point at infinity is imaged at the imaging plane.
摘要翻译：成像光学系统从物体侧到其像侧依次具有前透镜组，孔径光阑和后透镜组。满足以下条件（1）和（2）：1.15＆nlE; fb /IHω＆nlE; 1.7（1）-4.0＆nlE; fn / f＆nlE中的最靠近所述前透镜组中物体侧的透镜始终保持固定 ; -1.3（2）其中f是整个成像光学系统的焦距，fn是所述前透镜组中的第一负透镜的焦距，fb是在聚焦在物体上时成像光学系统的后焦点指向无限远，并且IHω是在聚焦在无限远物体上的来自最大入射半视角（ω）的主光线在成像平面成像的位置处的光轴的距离。

2. 发明申请

US20100290129A1 Eyepiece optical system and electronic view finder incorporating the same 有权
标题翻译：目镜光学系统和电子取景器相结合
公开(公告)号：US20100290129A1
公开(公告)日：2010-11-18
申请号：US12800126
申请日：2010-05-07
申请人： Akinori Nishio , Keitaro Yokoyama , Daichi Murakami
发明人： Akinori Nishio , Keitaro Yokoyama , Daichi Murakami
IPC分类号： G02B25/00
CPC分类号： G02B25/001
摘要： The invention relates to an eyepiece optical system that, albeit being of small size, works in favor of gaining an angle of field and optical performance, and an electronic view finder incorporating such an eyepiece optical system. Specifically, the invention is characterized by comprising, in order from an object side to an exit side thereof, a first lens group that is a single lens that has positive refracting power and is in a meniscus configuration concave on its object side, a second lens group that is a single lens that has negative refracting power and is in a meniscus configuration concave on its object side, and a third lens group that is a single lens that has positive refracting power, wherein an object-side concave lens surface in the first lens group is an aspheric surface, an object-side concave lens surface in the second lens group is an aspheric surface, and an exit-side lens surface in the third lens group is an aspheric surface.Alternatively, the eyepiece optical system is characterized by comprising a first lens group having a curved refractive surface, and a rear lens group having positive refracting power, wherein while the first lens group remains fixed, the rear lens group moves along an optical axis with satisfaction of given conditions, thereby implementing diopter adjustment.
摘要翻译：本发明涉及一种目镜光学系统，尽管尺寸小，但有利于获得一个视场角和光学性能，而且该目镜系统还包括一个并入目镜系统的电子取景器。具体而言，本发明的特征在于，从物体侧到出射侧依次包括具有正折射率并且在物体侧凹陷的弯月形状的单透镜的第一透镜组，第二透镜是具有负折射率并且在其物体侧凹陷的弯液面构造的单一透镜的组，以及具有正折射率的单透镜的第三透镜组，其中，在第一像素中的物体侧凹透镜表面透镜组是非球面，第二透镜组中的物体侧凹透镜表面是非球面，第三透镜组中的出射侧透镜表面是非球面。或者，目镜光学系统的特征在于包括具有弯曲折射面的第一透镜组和具有正折射力的后透镜组，其中当第一透镜组保持固定时，后透镜组满意地沿着光轴移动给定条件，从而实现屈光度调整。

3. 发明授权

US07605983B2 Viewing optical system, and imaging apparatus comprising the same 有权
标题翻译：观察光学系统及其成像设备
公开(公告)号：US07605983B2
公开(公告)日：2009-10-20
申请号：US12283850
申请日：2008-09-15
申请人： Keitaro Yokoyama
发明人： Keitaro Yokoyama
IPC分类号： G02B25/00
CPC分类号： G02B25/001 , G02B13/04
摘要： The invention relates to a viewing optical system for viewing an object image formed on a focusing screen, and an imaging apparatus comprising the same. An image erection optical system comprises a prism having an internal reflective surface. An eyepiece optical system comprises, in order from a screen side to an exit pupil side, a first lens component having negative refracting power wherein its exit pupil-side surface has a paraxial-radius-of-curvature absolute value smaller than that of its screen-side surface, a second lens component in a double-convex shape and a third meniscus lens component in a meniscus shape concave on an exit pupil side. The total number of lens components included in the eyepiece optical system is 3, and the following conditions (1), (2) and (3) are satisfied. 1.55
摘要翻译：本发明涉及一种用于观看形成在聚焦屏幕上的物体图像的观察光学系统和包括该观察光学系统的成像设备。图像安装光学系统包括具有内部反射表面的棱镜。目镜光学系统从屏幕侧到出射光瞳侧依次包括具有负屈光力的第一透镜部件，其中出射光瞳侧表面的近轴半径绝对值小于其屏幕的折射率侧面，双凸形状的第二透镜部件和在出射光瞳侧凹陷的弯液面形状的第三弯月形透镜部件。包括在目镜光学系统中的透镜组件的总数为3，满足以下条件（1），（2）和（3）。 1.55 0.35fe / Dip 1.0D3 /（D1 + D2）

4. 发明申请

US20110235191A1 Imaging optical system, and imaging apparatus incorporating the same 有权
标题翻译：成像光学系统和包含该成像装置的成像装置
公开(公告)号：US20110235191A1
公开(公告)日：2011-09-29
申请号：US12925470
申请日：2010-10-21
申请人： Kazuteru Kawamura , Keitaro Yokoyama
发明人： Kazuteru Kawamura , Keitaro Yokoyama
IPC分类号： G02B13/18 , G02B9/04
CPC分类号： G02B7/04 , G02B9/04
摘要： An imaging optical system has, in order from the object side to the image side thereof, a front lens group, an aperture stop, and a rear lens group. A lens located closest to object side in said front lens group always remains fixed in position, with satisfaction of the following conditions (1) and (2): 1.15≦fb/IHω≦1.7 (1) −4.0≦fn/f≦−1.3 (2) where f is a focal length of the whole imaging optical system, fn is a focal length of a first negative lens in said front lens group, fb is a back focus of the imaging optical system upon focusing on an object point at infinity, and IHω is a distance from an optical axis of a position where a chief ray from a maximum incident half angle of view (ω) upon focusing on an object point at infinity is imaged at the imaging plane.
摘要翻译：成像光学系统从物体侧到其像侧依次具有前透镜组，孔径光阑和后透镜组。满足以下条件（1）和（2）：1.15＆nlE; fb /IHω＆nlE; 1.7（1）-4.0＆nlE; fn / f＆nlE中的最靠近所述前透镜组中物体侧的透镜始终保持固定 ; -1.3（2）其中f是整个成像光学系统的焦距，fn是所述前透镜组中的第一负透镜的焦距，fb是在聚焦在物体上时成像光学系统的后焦点指向无限远，并且IHω是在聚焦在无限远物体上的来自最大入射半视角（ω）的主光线在成像平面成像的位置处的光轴的距离。

5. 发明申请

US20100027985A1 In-finder display apparatus 审中-公开
标题翻译：取景器显示装置
公开(公告)号：US20100027985A1
公开(公告)日：2010-02-04
申请号：US12460877
申请日：2009-07-27
申请人： Keitaro Yokoyama , Ryuji Kamada
发明人： Keitaro Yokoyama , Ryuji Kamada
IPC分类号： G03B13/06
CPC分类号： G03B13/06
摘要： An in-finder display apparatus comprises: a finder optical system adapted to view an object image formed by a taking lens on a focal plane plate by means of an eyepiece lens through a penta roof prism, a display cell located on a display member disposed near an imaging plane for the object image, and an illuminating optical system for illuminating the display cell. The display cell is illuminated by the illuminating optical system so that light reflected off the display cell together with the object image is viewable via the finder optical system.The illuminating optical system comprises: a light emitting means, and a light projecting lens for converging a light beam leaving the light emitting means. The illuminating optical system is positioned such that an illuminating light beam leaving the light emitting means in the illuminating optical system enters the display cell after transmitting through the light projecting lens.
摘要翻译：一种取景器显示装置，包括：取景器光学系统，适于通过目镜透镜通过五瓦顶棱镜在焦平面板上观察由拍摄透镜形成的物体图像;显示单元，位于靠近用于对象图像的成像平面和用于照亮显示单元的照明光学系统。显示单元被照明光学系统照亮，使得通过取景器光学系统可以观察到与目标图像一起从显示单元反射的光。照明光学系统包括：发光装置和用于会聚离开发光装置的光束的投光透镜。照明光学系统被定位成使得离开照明光学系统中的发光装置的照明光束在透射光投射透镜之后进入显示单元。

6. 发明申请

US20090097128A1 Viewing optical system, and imaging apparatus comprising the same 有权
标题翻译：观察光学系统及其成像设备
公开(公告)号：US20090097128A1
公开(公告)日：2009-04-16
申请号：US12283850
申请日：2008-09-15
申请人： Keitaro Yokoyama
发明人： Keitaro Yokoyama
IPC分类号： G02B17/08 , G02B27/02 , G02B17/04
CPC分类号： G02B25/001 , G02B13/04
摘要： The invention relates to a viewing optical system for viewing an object image formed on a focusing screen, and an imaging apparatus comprising the same. An image erection optical system comprises a prism having an internal reflective surface. An eyepiece optical system comprises, in order from a screen side to an exit pupil side, a first lens component having negative refracting power wherein its exit pupil-side surface has a paraxial-radius-of-curvature absolute value smaller than that of its screen-side surface, a second lens component in a double-convex shape and a third meniscus lens component in a meniscus shape concave on an exit pupil side. The total number of lens components included in the eyepiece optical system is 3, and the following conditions (1), (2) and (3) are satisfied. 1.55
摘要翻译：本发明涉及一种用于观看形成在聚焦屏幕上的物体图像的观察光学系统和包括该观察光学系统的成像设备。图像安装光学系统包括具有内部反射表面的棱镜。目镜光学系统从屏幕侧到出射光瞳侧依次包括具有负屈光力的第一透镜部件，其中出射光瞳侧表面的近轴半径绝对值小于其屏幕的折射率侧面，双凸形状的第二透镜部件和在出射光瞳侧凹陷的弯液面形状的第三弯月形透镜部件。包括在目镜光学系统中的透镜组件的总数为3，满足以下条件（1），（2）和（3）。 <？in-line-formula description =“In-line Formulas”end =“lead”？> 1.55 <？in-line-formula description =“In-line Formulas”end =“lead”？> 0.35 <？in-line-formula description =”In-line Formulas“end =”lead“？> 1.0

7. 发明申请

US20180224641A1 ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME 审中-公开
公开(公告)号：US20180224641A1
公开(公告)日：2018-08-09
申请号：US15945661
申请日：2018-04-04
申请人： Kazuteru Kawamura , Akiko Naito , Keitaro Yokoyama , Toshio Takahashi
发明人： Kazuteru Kawamura , Akiko Naito , Keitaro Yokoyama , Toshio Takahashi
IPC分类号： G02B15/163 , G02B15/177 , H04N5/262 , G02B5/00 , G02B13/18 , G02B27/00 , H04N5/225 , G02B13/00 , G02B9/60 , G02B9/34 , G02B9/00 , G02B7/10 , G02B15/14 , G02B15/16 , G02B15/20 , G02B13/04
CPC分类号： G02B15/163 , G02B5/005 , G02B7/10 , G02B9/00 , G02B9/34 , G02B9/60 , G02B13/0015 , G02B13/004 , G02B13/0045 , G02B13/009 , G02B13/04 , G02B13/18 , G02B15/14 , G02B15/16 , G02B15/177 , G02B15/20 , G02B27/0025 , H04N5/2254 , H04N5/2628
摘要： A zoom lens comprises four lens unit, and at the time of zooming, each of a distance between a first positive lens unit and a first negative lens unit and a distance between a second negative lens unit and a second positive lens unit changes, and a distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, and the first positive lens unit includes an object-side sub-lens unit and an image-side sub-lens unit, and an aperture stop is disposed between the object-side sub-lens unit and the image-side sub-lens unit, and the first negative lens unit includes a negative lens and a positive lens, and a refracting surface nearest to an image in the first negative lens unit is concave toward the image side, and a refracting surface nearest to an object in the second positive lens unit is concave toward the object side, and a refracting surface nearest to the image in the second positive lens unit is convex toward the image side, and the zoom lens satisfies predetermined conditional expressions.

8. 发明授权

US07969658B2 Eyepiece optical system and electronic view finder incorporating the same 有权
公开(公告)号：US07969658B2
公开(公告)日：2011-06-28
申请号：US12800126
申请日：2010-05-07
申请人： Akinori Nishio , Keitaro Yokoyama , Daichi Murakami
发明人： Akinori Nishio , Keitaro Yokoyama , Daichi Murakami
IPC分类号： G02B25/00 , G02B15/14 , G02B13/18 , G03B13/10
CPC分类号： G02B25/001
摘要： The invention relates to an eyepiece optical system that, albeit being of small size, works in favor of gaining an angle of field and optical performance, and an electronic view finder incorporating such an eyepiece optical system. Specifically, the invention is characterized by comprising, in order from an object side to an exit side thereof, a first lens group that is a single lens that has positive refracting power and is in a meniscus configuration concave on its object side, a second lens group that is a single lens that has negative refracting power and is in a meniscus configuration concave on its object side, and a third lens group that is a single lens that has positive refracting power, wherein an object-side concave lens surface in the first lens group is an aspheric surface, an object-side concave lens surface in the second lens group is an aspheric surface, and an exit-side lens surface in the third lens group is an aspheric surface.Alternatively, the eyepiece optical system is characterized by comprising a first lens group having a curved refractive surface, and a rear lens group having positive refracting power, wherein while the first lens group remains fixed, the rear lens group moves along an optical axis with satisfaction of given conditions, thereby implementing diopter adjustment.

9. 发明授权

US07855837B2 Viewing optical system and imaging apparatus incorporating the same 有权
标题翻译：观看包含其的光学系统和成像装置
公开(公告)号：US07855837B2
公开(公告)日：2010-12-21
申请号：US12384769
申请日：2009-04-07
申请人： Keitaro Yokoyama
发明人： Keitaro Yokoyama
IPC分类号： G02B25/00
CPC分类号： G02B23/14 , G03B13/06
摘要： The invention provides a viewing optical system comprising: a screen on which an object image by a taking lens is formed, an image erection optical system for erecting the object image formed on the screen, and an eyepiece lens system of positive refracting power for guiding a light beam leaving the image erection optical system to the eyeball of a viewer, wherein: the image erection optical system comprises a plurality of reflecting surfaces, the eyepiece optical system comprises, in order from a screen side to an exit pupil side, a first lens element of negative refracting power, a second lens element convex on both the screen side and the exit pupil side, and a third lens element that is of negative refracting power and has a meniscus shape concave on the exit pupil side, and the third lens element satisfies the following condition (1): 0.13
摘要翻译：本发明提供了一种观察光学系统，其特征在于，包括：在其上形成有通过拍摄镜头的物体图像的画面，用于竖立形成在所述画面上的被摄体图像的图像安装光学系统，以及具有正折射力的目镜透镜系统，光束离开图像架设光学系统到观察者的眼球，其中：图像安装光学系统包括多个反射表面，目镜光学系统从屏幕侧到出射光瞳侧依次包括第一透镜负折射率的元件，在屏幕侧和出射光瞳侧均凸出的第二透镜元件，以及具有负折射率并且具有在出射光瞳侧凹陷的弯月面形状的第三透镜元件，以及第三透镜元件满足以下条件（1）：0.13

10. 发明申请

US20090262434A1 Viewing optical system and imaging apparatus incorporating the same 有权
标题翻译：观看包含其的光学系统和成像装置
公开(公告)号：US20090262434A1
公开(公告)日：2009-10-22
申请号：US12384769
申请日：2009-04-07
申请人： Keitaro Yokoyama
发明人： Keitaro Yokoyama
IPC分类号： G02B17/08
CPC分类号： G02B23/14 , G03B13/06
摘要： The invention provides a viewing optical system comprising: a screen on which an object image by a taking lens is formed, an image erection optical system for erecting the object image formed on the screen, and an eyepiece lens system of positive refracting power for guiding a light beam leaving the image erection optical system to the eyeball of a viewer, wherein: the image erection optical system comprises a plurality of reflecting surfaces, the eyepiece optical system comprises, in order from a screen side to an exit pupil side, a first lens element of negative refracting power, a second lens element convex on both the screen side and the exit pupil side, and a third lens element that is of negative refracting power and has a meniscus shape concave on the exit pupil side, and the third lens element satisfies the following condition (1): 0.13
摘要翻译：本发明提供了一种观察光学系统，其特征在于，包括：在其上形成有通过拍摄镜头的物体图像的画面，用于竖立形成在所述画面上的被摄体图像的图像安装光学系统，以及具有正折射力的目镜透镜系统，光束离开图像架设光学系统到观察者的眼球，其中：图像安装光学系统包括多个反射表面，目镜光学系统从屏幕侧到出射光瞳侧依次包括第一透镜负折射率的元件，在屏幕侧和出射光瞳侧均凸出的第二透镜元件，以及具有负折射率并且具有在出射光瞳侧凹陷的弯月面形状的第三透镜元件，以及第三透镜元件满足以下条件（1）：0.13DL3 / fe其中DL3是第三透镜的轴向厚度，fe是目镜透镜系统的焦距，前提是当eyepiec e透镜系统通过透镜的运动可以调节屈光度，fe将成为-1屈光度的焦距。

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