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：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：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：US4801963A

公开(公告)日：1989-01-31

申请号：US941308

申请日：1986-12-15

申请人： Takeshi Koyama ,  Keiji Ohtaka

发明人： Takeshi Koyama ,  Keiji Ohtaka

IPC分类号： G02B7/32 ,  G03B3/00 ,  G03B15/03

CPC分类号： G02B7/32

摘要： A focus detecting system having a focus detecting apparatus for performing focus detection based on the output signal from a photo-sensing device, and a pattern projector for projecting a pattern onto an object, wherein the aforesaid pattern is so arranged that the spatial frequency lowers successively.

摘要翻译： 一种聚焦检测系统，具有用于根据来自感光装置的输出信号进行焦点检测的焦点检测装置和用于将图案投影到物体上的图案投影仪，其中上述图案被布置成使得空间频率相继降低 。

公开(公告)号：US4907026A

公开(公告)日：1990-03-06

申请号：US382029

申请日：1989-07-19

申请人： Takeshi Koyama ,  Keiji Ohtaka

发明人： Takeshi Koyama ,  Keiji Ohtaka

IPC分类号： G02B7/32

CPC分类号： G02B7/32

摘要： A focus detecting light projecting system for detecting the focus state of a photo taking optic by projecting a pattern with a light projecting lens onto a photographing object and by receiving a reflected image of the pattern reflected from the objects. The light projecting lens has a plurality of lens parts which have different optical axes and different forward focus-adjusting degrees.

摘要翻译： 一种聚焦检测光投射系统，用于通过将具有光投射透镜的图案投影到拍摄对象上并通过接收从物体反射的图案的反射图像来检测摄影光学元件的聚焦状态。 光投射透镜具有多个透镜部件，其具有不同的光轴和不同的正向聚焦调节度。

公开(公告)号：US4849782A

公开(公告)日：1989-07-18

申请号：US877850

申请日：1986-06-24

申请人： Takeshi Koyama ,  Keiji Ohtaka

发明人： Takeshi Koyama ,  Keiji Ohtaka

IPC分类号： G02B7/34

CPC分类号： G02B7/343

摘要： A focus detecting device having a field lens disposed near the predetermined imaging plane of an objective and a secondary imaging optical system disposed rearwardly of the field lens, whereby a pair of object images based on light beams passing through different portions of the pupil of the objective are formed and the respective object images are detected by photoelectric conversion element rows disposed rearwardly of the secondary imaging optical system to thereby discriminate the focus state of the objective from the amount of relative deviation of the object images is characterized in that a refracting portion for refracting the light beam in the direction of arrangement of the photoelectric conversion elements is provided in the secondary imaging optical system.

摘要翻译： 一种聚焦检测装置，其具有设置在物镜的预定成像平面附近的场透镜和设置在场透镜后方的二次成像光学系统，由此基于通过目标的瞳孔的不同部分的光束的一对物体图像 并且通过设置在次级成像光学系统的后方的光电转换元件行来检测各个物体图像，从而将物体的聚焦状态与物体图像的相对偏离量相区别，其特征在于折射部分 在二次成像光学系统中设置在光电转换元件的布置方向上的光束。

公开(公告)号：US4841326A

公开(公告)日：1989-06-20

申请号：US115905

申请日：1987-11-02

申请人： Takeshi Koyama ,  Keiji Ohtaka

发明人： Takeshi Koyama ,  Keiji Ohtaka

IPC分类号： G03B13/36 ,  G02B3/00 ,  G02B7/34

CPC分类号： G02B3/0043 ,  G02B3/0056 ,  G02B7/346

摘要： A focus detecting apparatus is provided with a plurality of pattern forming lenses for forming light patterns whose relative positional relation varies in conformity with the focus adjusted state of an objective optical system from lights passed through different areas on the pupil of the objective optical a sensing device is included for sensing the light patterns and producing a signal regarding the relative positional relation between the light patterns. A light divider is inclined along an optical path passing through the areas on the pupil and has a light-transmitting area through which light is refracted and transmitted. The light divider is disposed between the objective optical system and the pattern forming lenses. The pattern forming lenses are different in shape and are formed asymmetrically with respect to the optic axis of the objective optical system to correct the destruction of the light patterns caused by the light divider.

摘要翻译： 焦点检测装置设置有多个图案形成透镜，用于形成相对位置关系根据物镜光学系统的焦点调整状态从通过物镜光瞳上的不同区域的光线变化的光图案， 被包括用于感测光图案并且产生关于光图案之间的相对位置关系的信号。 分光器沿着通过光瞳上的区域的光路倾斜，并具有透光区域，光线通过该透光区域被折射和透射。 光分配器设置在物镜光学系统和图案形成透镜之间。 图案形成透镜的形状不同，并且相对于物镜光学系统的光轴不对称地形成，以校正由分光器引起的光图案的破坏。

公开(公告)号：US4975727A

公开(公告)日：1990-12-04

申请号：US391717

申请日：1989-08-07

申请人： Keiji Ohtaka ,  Takeshi Koyama

发明人： Keiji Ohtaka ,  Takeshi Koyama

IPC分类号： G03B13/36 ,  G02B7/02 ,  G02B7/09 ,  G02B7/34

CPC分类号： G02B7/346

摘要： In a focus detecting device having optical means for forming a plurality of light quantity distributions from light fluxes passing through an objective lens and arrays of sensors arranged to sample the light quantity distributions and to separately produce signals, at least a part of the optical means is made of a material having a moisture absorption expansion coefficient .alpha. which is obtained at 100% humidity relative to 0% humidity and satisfies the following condition:-0.23%.ltoreq..alpha..ltoreq.+0.23%

摘要翻译： 在具有用于从通过物镜的光束形成多个光量分布的光学装置的焦点检测装置和布置成对光量分布进行采样并分别产生信号的传感器阵列中，光学装置的至少一部分是 由在100％湿度下相对于0％湿度获得的吸湿膨胀系数α的材料制成，满足以下条件：-0.23％

公开(公告)号：US4922282A

公开(公告)日：1990-05-01

申请号：US375992

申请日：1989-07-06

申请人： Takeshi Koyama ,  Keiji Ohtaka

发明人： Takeshi Koyama ,  Keiji Ohtaka

IPC分类号： G03B13/36 ,  G02B7/34

CPC分类号： G02B7/34

摘要： An optical system for detecting the focus of an objective lens includes a focus detecting apparatus for receiving light intensity distributions reflected from an object and formed by light flux passing through two different areas of a pupil of the objective lens, and for forming a signal indicative of the focus state of the objective lens. A light dividing device is obliquely arranged with respect to the pupil areas of the objective lens and distributes the light fluxes which pass through the objective lens to both the focus detecting apparatus and an optical apparatus. The light dividing device has a dielectric multilayer film such that spectral characteristics of a wave length area in which the focus detecting apparatus has a sensitivity are substantially flat.

摘要翻译： 用于检测物镜的焦点的光学系统包括焦点检测装置，用于接收从物体反射并由通过物镜的光瞳的两个不同区域的光束形成的光强度分布，并形成指示 物镜的焦点状态。 光分离装置相对于物镜的瞳孔区域倾斜地布置，并且将通过物镜的光束分配给焦点检测装置和光学装置。 光分离装置具有电介质多层膜，使得焦点检测装置具有灵敏度的波长区域的光谱特性基本上是平坦的。