公开(公告)号：US5262819A

公开(公告)日：1993-11-16

申请号：US824873

申请日：1992-01-22

申请人： Keiji Ohtaka ,  Takeshi Koyama ,  Yasuo Suda

发明人： Keiji Ohtaka ,  Takeshi Koyama ,  Yasuo Suda

IPC分类号： G02B7/34 ,  G03B13/00

CPC分类号： G02B7/346

摘要： A compact focus detecting device featuring increased optical paths includes a first detecting system having first light intensity distribution forming structure for forming a light beam passing through the objective lens a light intensity distribution of which varies in relative position according to the focus state of the objective lens. A first light receiving sensor receives the first light intensity distribution and outputs a first signal indicative of the focused state of the objective lens. The first detecting system has a first detection field and a first optical path. A second detecting system has a second detecting field with a center spaced apart from the center of the first detection field, and a second optical path. The second detecting system includes second light intensity distribution forming structure for forming from the light beam passing through the objective lens a light intensity distribution which varies in relative position according to the focused state of the objective lens. A second light receiving sensor receives the second light intensity distribution and outputs a second signal indicative of the focus state of the objective lens. A light transmitting optical member is provided for adjusting the length of the first and second optical paths. Preferably, the optical member comprises a block having an internal reflecting surface.

摘要翻译： 具有增加的光路的小型聚焦检测装置包括具有第一光强分布形成结构的第一检测系统，用于形成通过物镜的光束，其光强分布根据物镜的聚焦状态在相对位置上变化 。 第一光接收传感器接收第一光强分布并输出表示物镜的聚焦状态的第一信号。 第一检测系统具有第一检测场和第一光路。 第二检测系统具有第二检测场，其具有与第一检测场的中心间隔开的中心和第二光路。 第二检测系统包括第二光强分布形成结构，用于从通过物镜的光束形成根据物镜的聚焦状态在相对位置上变化的光强度分布。 第二光接收传感器接收第二光强度分布并输出表示物镜聚焦状态的第二信号。 光传输光学构件被设置用于调节第一和第二光路的长度。 优选地，光学构件包括具有内部反射表面的块。

公开(公告)号：US4878078A

公开(公告)日：1989-10-31

申请号：US190171

申请日：1988-05-04

申请人： Takeshi Koyama ,  Keiji Ohtaka ,  Yasuo Suda

发明人： Takeshi Koyama ,  Keiji Ohtaka ,  Yasuo Suda

IPC分类号： G02B7/34

CPC分类号： G02B7/346

摘要： In a focus detecting device having a secondary image unit disposed rearwardly of the predetermined imaging plane of an objective lens, a plurality of pairs of object images based on light fluxes passing through different portions of the pupil of the objective lens are formed on a photoelectric conversion element array disposed rearwardly of the secondary imaging unit. The focus of the objective lens is detected from the amount of relative deviation between the object images formed on the photoelectric conversion element array. The secondary imaging unit includes at least two members, a first member having a first pair of lens-acting surfaces and a second pair of lens-acting surfaces on one end thereof, and a second member having a first pair of prism surfaces and a second pair of prism surfaces which differ in refractive power from each other. The second member being fixed to the first member after being rotatively adjusted relative to the first member.

摘要翻译： 在具有设置在物镜的预定成像平面的后方的二次图像单元的焦点检测装置中，基于通过物镜的光瞳的不同部分的光束的多对物体图像形成在光电转换 元件阵列设置在次级成像单元的后方。 从形成在光电转换元件阵列上的物体图像之间的相对偏离量来检测物镜的焦点。 二次成像单元包括至少两个构件，第一构件，其具有第一对透镜作用表面和在其一个端部上的第二对透镜作用表面，以及具有第一对棱镜表面的第二构件和第二构件 折射力彼此不同的一对棱镜表面。 所述第二构件在相对于所述第一构件旋转调整之后被固定到所述第一构件。

公开(公告)号：US4728785A

公开(公告)日：1988-03-01

申请号：US947824

申请日：1986-12-30

申请人： Ichiro Ohnuki ,  Yasuo Suda ,  Akira Ishizaki ,  Akira Akashi ,  Keiji Ohtaka ,  Takeshi Koyama

发明人： Ichiro Ohnuki ,  Yasuo Suda ,  Akira Ishizaki ,  Akira Akashi ,  Keiji Ohtaka ,  Takeshi Koyama

IPC分类号： G02B7/34 ,  G01J1/20

CPC分类号： G02B7/346

摘要： An adjusting screw for adjusting the inclination of a sensor unit body including sensing means for producing the information about the focus adjusted state on the basis of a light beam from an objective lens is moved with the sensor unit body perpendicularly to the optic axis of the objective lens, whereby adjustment of the optic axis of the objective lens is accomplished. At least two adjusting means are provided for inclining the sensing means itself at a predetermined angle with respect to the optic axis.

摘要翻译： 用于调节传感器单元主体的倾斜度的调节螺钉，其包括用于根据来自物镜的光束产生关于聚焦调节状态的信息的感测装置，传感器单元主体垂直于物镜的光轴移动 透镜，由此实现物镜的光轴的调节。 提供至少两个调节装置用于使感测装置本身相对于光轴以预定的角度倾斜。

公开(公告)号：US4792668A

公开(公告)日：1988-12-20

申请号：US936746

申请日：1986-12-02

申请人： Akira Akashi ,  Akira Ishizaki ,  Yasuo Suda ,  Ichiro Ohnuki ,  Keiji Ohtaka ,  Takeshi Koyama

发明人： Akira Akashi ,  Akira Ishizaki ,  Yasuo Suda ,  Ichiro Ohnuki ,  Keiji Ohtaka ,  Takeshi Koyama

IPC分类号： G02B7/36 ,  G03B3/00

CPC分类号： G02B7/36

摘要： An apparatus for detecting a focusing state of an objective lens comprises optical means for forming light intensity distributions of object images whose relative positional relationship changes with the focusing state of the objective lens, sensing means having a plurality of sensors for sensing the light intensity distributions to produce first and second signals relating to the light intensity distributions, signal processing means for relatively displacing the first and second signals by determining correlation information and producing a signal for adjusting the focusing state of the objective lens in accordance with the correlation information, and altering means for altering a displacement range within which the first and second signals are relatively displaced.

摘要翻译： 用于检测物镜的聚焦状态的装置包括光学装置，用于形成相对位置关系随着物镜的聚焦状态而变化的物体图像的光强度分布，感测装置具有多个用于感测光强度分布的传感器 产生与光强分布有关的第一和第二信号，用于通过确定相关信息并产生用于根据相关信息调整物镜的聚焦状态的信号来相对移位第一和第二信号的信号处理装置，以及改变装置 用于改变第一和第二信号相对移位的位移范围。

公开(公告)号：US5109154A

公开(公告)日：1992-04-28

申请号：US690332

申请日：1991-04-26

申请人： Masaki Higashihara ,  Keiji Ohtaka ,  Kenji Suzuki ,  Takeshi Koyama ,  Yasuo Suda

发明人： Masaki Higashihara ,  Keiji Ohtaka ,  Kenji Suzuki ,  Takeshi Koyama ,  Yasuo Suda

IPC分类号： G03B13/36 ,  G02B7/34

CPC分类号： G02B7/346

摘要： A focusing detecting device is disclosed having apparatus for forming object light patterns whose relative position changes in conformity with a focus state of an objective lens. Light flux passes through different areas of an exit pupil of the objective lens, and circuitry receives and photoelectrically converts the light patterns, and detects the focus state of the objective lens on the basis of the photoelectrically converted signal. The focusing apparatus accroding to the present invention a plurality of sets of structures for forming light patterns and means for photoelectrically converting the light patterns which are provided at different distances from the position of the optic axis of the objective lens. Also disclosed are means for making (a) the shapes of the areas of the exit pupil through which the light flux is passed to form the light patterns, or (b) intervals between the centers of gravity of said areas, or (c) both, different between a position in the vicinity of the optic axis of the objective lens, and a position distant therefrom.

摘要翻译： 公开了一种聚焦检测装置，其具有用于形成相对位置根据物镜的焦点状态变化的物体光图案的装置。 光通量通过物镜的出射光瞳的不同区域，并且电路接收并光电转换光图案，并且基于光电转换信号检测物镜的聚焦状态。 根据本发明的聚焦装置用于形成光图案的多组结构和用于光电转换设置在与物镜的光轴的位置不同的距离处的光图案的装置。 还公开了用于制造（a）通过光束通过的出射光瞳的区域的形状以形成光图案的装置，或（b）所述区域的重心之间的间隔，或（c）两者 在物镜的光轴附近的位置和远离物镜的位置之间不同。

公开(公告)号：US4859842A

公开(公告)日：1989-08-22

申请号：US313343

申请日：1989-02-21

申请人： Yasuo Suda ,  Ichiro Ohnuki ,  Akira Akashi ,  Akira Ishizaki ,  Keiji Ohtaka ,  Takeshi Koyama

发明人： Yasuo Suda ,  Ichiro Ohnuki ,  Akira Akashi ,  Akira Ishizaki ,  Keiji Ohtaka ,  Takeshi Koyama

IPC分类号： G02B7/34

CPC分类号： G02B7/346

摘要： A focus detection apparatus includes:a first optical device for forming light distributions, associated with an object image, whose relative positional relationship chnages along a first direction in accordance with a focusing state of the objective lens;a second optical device for forming light distributions, associated with the object image, whose relative positional relationship changes along a second direction in accordance with the focusing state of the objective lens;a first sensing unit, having a plurality of photosensors, for forming an electrical signal associated with the focusing state of the objective lens in order to sense the light distributions formed by the first optical device; anda second sensing unit, having a plurality of photosensors, for forming an electrical signal associated with the focusing state of the objective lens in order to sense the light distribution formed by the second optical device.

摘要翻译： 焦点检测装置包括：第一光学装置，用于形成与物体图像相关联的光分布，其相对位置关系根据物镜的聚焦状态沿着第一方向检测; 用于形成与所述物体图像相关联的光分布的第二光学装置，其相对位置关系根据所述物镜的聚焦状态沿第二方向变化; 具有多个光电传感器的第一感测单元，用于形成与所述物镜的聚焦状态相关联的电信号，以便感测由所述第一光学装置形成的光分布; 以及具有多个光电传感器的第二感测单元，用于形成与物镜的聚焦状态相关联的电信号，以便感测由第二光学装置形成的光分布。

公开(公告)号：US4800410A

公开(公告)日：1989-01-24

申请号：US70382

申请日：1987-07-07

申请人： Akira Akashi ,  Akira Ishizaki ,  Yasuo Suda ,  Ichiro Ohnuki ,  Keiji Ohtaka ,  Takeshi Koyama

发明人： Akira Akashi ,  Akira Ishizaki ,  Yasuo Suda ,  Ichiro Ohnuki ,  Keiji Ohtaka ,  Takeshi Koyama

IPC分类号： G02B7/34 ,  G03B13/36 ,  G03B3/00 ,  G01J1/20

CPC分类号： G02B7/34

摘要： A focus detecting apparatus in which light distributions having their relative positional relation varying in conformity with the focus adjusted state of an objective optical system and based on an object are received by a light-receiving device having a plurality of picture elements and the output signal of the light-receiving device is operated in two different processes, and an evaluated values dependent on the contrast is operated in each of the processes and the evaluated values are compared with each other, and the result calculated in the process of better contrast is adopted as a value indicative of the focus adjusted state of the objective optical system.

摘要翻译： 一种聚焦检测装置，其具有根据物镜光学系统的焦点调整状态而变化的并且基于物体的相对位置关系的光分布由具有多个像素的光接收装置接收，并且其输出信号 光接收装置在两个不同的处理中操作，并且在每个处理中操作依赖于对比度的评估值，并且将评估值相互比较，并且在较好对比度的过程中计算的结果被采用为 指示物镜光学系统的焦点调整状态的值。

公开(公告)号：US5459551A

公开(公告)日：1995-10-17

申请号：US188109

申请日：1994-01-28

申请人： Kenji Suzuki ,  Takeshi Koyama ,  Keiji Ohtaka ,  Yasuo Suda

发明人： Kenji Suzuki ,  Takeshi Koyama ,  Keiji Ohtaka ,  Yasuo Suda

IPC分类号： G02B7/28 ,  G02B7/32 ,  G03B13/36

CPC分类号： G02B7/32

摘要： A device for projecting, by a light projection lens, a pattern chart image toward an object focus-detected by a focus detecting device comprises a chart having a predetermined pattern, and an illuminator for illuminating the chart non-uniformly.

摘要翻译： 用于通过光投射透镜将图案图像投射到由焦点检测装置检测到的对象聚焦的装置包括具有预定图案的图表和用于不均匀地照亮图表的照明器。

公开(公告)号：US4992819A

公开(公告)日：1991-02-12

申请号：US429607

申请日：1989-10-31

申请人： Keiji Ohtaka ,  Takeshi Koyama ,  Yasuo Suda

发明人： Keiji Ohtaka ,  Takeshi Koyama ,  Yasuo Suda

IPC分类号： G02B7/34

CPC分类号： G02B7/346

摘要： In a focus detecting device, a plurality of distributions of quantity of light regarding the image of an object to be photographed are formed by optical means disposed on the image plane side of an objective lens by the use of light beams passed through different areas of the pupil of the objective lens. The relative positional relation between the plurality of distributions of quantity of light is found by light receiving means, and the in-focus state of the objective lens is found by the use of a signal from the light receiving means. The optical means has at least three pairs of secondary imaging lenses each forming a pair of light distributions corresponding to the image of the object to be photographed, and is constructed so that at least two of the light segments passing through the vertices of the lens surfaces of the pairs of secondary imaging lenses intersect each other and at least one other light segment does not intersect.

摘要翻译： 在焦点检测装置中，通过使用通过不同区域的光束，通过设置在物镜的像面侧的光学装置来形成关于待拍摄对象的图像的光量的多个分布 物镜的瞳孔。 通过光接收装置找到多个光量分布之间的相对位置关系，并且通过使用来自光接收装置的信号来找到物镜的聚焦状态。 光学装置具有至少三对次级成像透镜，每个成像透镜形成与被拍摄对象的图像相对应的一对光分布，并且被构造成使得穿过透镜表面的顶点的至少两个光段 一对次级成像透镜彼此相交并且至少一个其它光段不相交。

公开(公告)号：US4774539A

公开(公告)日：1988-09-27

申请号：US102011

申请日：1987-09-28

申请人： Yasuo Suda ,  Kazuhiko Arakawa ,  Keiji Ohtaka ,  Takeshi Koyama ,  Ichiro Ohnuki

发明人： Yasuo Suda ,  Kazuhiko Arakawa ,  Keiji Ohtaka ,  Takeshi Koyama ,  Ichiro Ohnuki

IPC分类号： G02B7/34 ,  G03B3/00

CPC分类号： G02B7/346

摘要： In a camera provided with a focus detecting apparatus in which the object light passed through a photo-taking lens is limited in its passage area by a field mask, the secondary image of an object to be photographed is obtained by a secondary imaging optical system and the secondary image is received by a line sensor and the imaging condition of the photo-taking lens is detected on the basis of the photoelectrically converted output of the line sensor, the opening area of the field mask is set so that the secondary image of the object to be photographed is directed to the both sides of the line sensor, and spot photometering sensors are disposed on the both sides of the line sensor and in the area to which the secondary image is applied, so that the photometering center of gravity is positioned substantially on the line sensor.

摘要翻译： 在设置有焦点检测装置的相机中，通过摄像镜头的物体光通过场屏蔽被限制在其通过区域中，通过次级成像光学系统获得要拍摄的被摄体的二次图像， 次级图像被线传感器接收，并且基于线传感器的光电转换输出来检测摄影镜头的成像条件，设置场掩模的开口面积，使得二次图像 要拍摄的物体被引导到线传感器的两侧，并且点测光传感器设置在线传感器的两侧以及在施加二次图像的区域中，使得测光重心位于 基本上在线传感器上。