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公开(公告)号：US4905034A
公开(公告)日：1990-02-27
申请号：US120650
申请日：1987-11-16
申请人： Yasuyuki Tejima , Akihiro Arai , Hideaki Yuda , Saburoh Sugawara , Shigeo Tohji
发明人： Yasuyuki Tejima , Akihiro Arai , Hideaki Yuda , Saburoh Sugawara , Shigeo Tohji
摘要： An automatic focusing projector has a reflector which includes a semispherical mirror and a semielliptical mirror in combination, and a contrast chart having a contrast pattern associated with the reflector. The first focal point of the semielliptical mirror is identical to the center of the semispherical mirror. The contrast pattern is located between the first and second focal points of the semielliptical mirror. A light source is provided in the vicinity of the first focal point of the semielliptical mirror. The light source can be a white light source, and a colored filter can be positioned forwardly of a projecting lens which forms part of the projector in order to pass light having a wavelength region of low luminosity in which a human eye is virtually insensitive.
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公开(公告)号：US4949115A
公开(公告)日：1990-08-14
申请号：US389299
申请日：1989-08-03
申请人： Yasuyuki Tejima , Akihiro Arai , Hideaki Yuda , Saburo Sugawara , Shigeo Toji
发明人： Yasuyuki Tejima , Akihiro Arai , Hideaki Yuda , Saburo Sugawara , Shigeo Toji
摘要： An automatic focusing projector has a reflector which includes a semispherical mirror and a semielliptical mirror in combination, and a contrast chart having a contrast pattern associated with the reflector. The first focal point of the semielliptical mirror is identical to the center of the semispherical mirror. The contrast pattern is located between the first and second focal points of the semielliptical mirror. A light source is provided in the vicinity of the first focal point of the semielliptical mirror. The light source can be a white light source, and a colored filter can be positioned forwardly of a projecting lens which forms part of the projector in order to pass light having a wavelength region of low luminosity in which a human eye is virtually insensitive.
摘要翻译： 自动聚焦投影仪具有组合有半球形反射镜和半透明反射镜的反射器，以及具有与反射器相关联的对比度图案的对比图。 半椭圆镜的第一焦点与半球形镜的中心相同。 对比度图案位于半椭圆镜的第一和第二焦点之间。 在半透镜的第一焦点附近设置光源。 光源可以是白色光源，并且彩色滤光片可以位于形成投影仪一部分的投影透镜的前方，以便通过人眼几乎不敏感的具有低亮度波长区域的光。
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公开(公告)号：US4870442A
公开(公告)日：1989-09-26
申请号：US218389
申请日：1988-07-13
申请人： Yasuyuki Tejima , Saburo Sugawara , Hideaki Yuda
发明人： Yasuyuki Tejima , Saburo Sugawara , Hideaki Yuda
CPC分类号： G02B7/32
摘要： An auxiliary light source for a passive focus detector, such as would be used for automatic focusing. A projection lens is inclined with respect to the imaging lens and projects a patterned image from a surface inclined with respect to the projection lens. Preferably the patterned image is projected to lie along the axis of the imaging lens so that a sharp illumination pattern is formed at all distances along that axis. Preferably the pattern is such that a higher intensity portion is imaged at a far distance and a lower intensity portion is imaged at a near distance.
摘要翻译： 用于被动焦点检测器的辅助光源，例如将被用于自动对焦。 投影透镜相对于成像透镜倾斜并且从相对于投影透镜倾斜的表面投影图案化图像。 优选地，图案化图像被投影成沿着成像透镜的轴线，使得沿着该轴线的所有距离形成尖锐的照明图案。 优选地，图案使得较高强度部分在远距离成像，并且较低强度部分以近距离成像。
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公开(公告)号：US4771308A
公开(公告)日：1988-09-13
申请号：US29924
申请日：1987-03-25
申请人： Yasuyuki Tejima , Saburo Sugawara , Hideaki Yuda
发明人： Yasuyuki Tejima , Saburo Sugawara , Hideaki Yuda
CPC分类号： G02B7/32
摘要： An auxiliary light source for a passive focus detector, such as would be used for automatic focusing. A projection lens is inclined with respect to the imaging lens and projects a patterned image from a surface inclined with respect to the projection lens. Preferably the patterned image is projected to lie along the axis of the imaging lens so that a sharp illumination pattern is formed at all distances along that axis. Preferably the pattern is such that a higher intensity portion is imaged at a far distance and a lower intensity portion is imaged at a near distance.
摘要翻译： 用于被动焦点检测器的辅助光源，例如将被用于自动对焦。 投影透镜相对于成像透镜倾斜并且从相对于投影透镜倾斜的表面投影图案化图像。 优选地，图案化图像被投影成沿着成像透镜的轴线，使得沿着该轴线的所有距离形成尖锐的照明图案。 优选地，图案使得较高强度部分在远距离成像，并且较低强度部分以近距离成像。
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公开(公告)号：US07529034B2
公开(公告)日：2009-05-05
申请号：US11799612
申请日：2007-05-02
申请人： Etsuro Kawakami , Yasuyuki Tejima
发明人： Etsuro Kawakami , Yasuyuki Tejima
IPC分类号： G02B15/14
CPC分类号： G02B15/177
摘要： There is provided a compact zoom lens having a small lens aperture which an image from a light valve such as a DMD is projected on to a screen in an enlarged scale.There is provided a zoom lens comprising, in order from a magnifying side, a first lens group having a negative refractive power as a whole, a second lens group having a positive or negative refractive power as a whole, a third lens group having a positive refractive power as a whole and a fourth lens group having a positive refractive power as a whole, wherein a variable power as a whole lens system thereof is established by configuring such that the fourth lens group is left fixed while a variable power is effected, and the first lens group, the second lens group and the third lens group are made to move on the optical axis.
摘要翻译： 提供了具有小透镜孔径的紧凑型变焦透镜，来自诸如DMD的光阀的图像以放大的尺度投影到屏幕上。 提供了一种变焦透镜，其从放大侧依次具有作为整体的具有负折射光焦度的第一透镜组，具有正的或负的折射光焦度的第二透镜组，具有正的或负的折射光焦度的第三透镜组 作为整体的折射光焦度和具有正折射光焦度的第四透镜组，其中作为其整个透镜系统的可变光焦度被构造成使得第四透镜组在实现可变功率时被固定，并且 使第一透镜组，第二透镜组和第三透镜组在光轴上移动。
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公开(公告)号：US20080019021A1
公开(公告)日：2008-01-24
申请号：US11879692
申请日：2007-07-17
申请人： Etsuro Kawakami , Yasuyuki Tejima
发明人： Etsuro Kawakami , Yasuyuki Tejima
IPC分类号： G02B15/14
CPC分类号： G02B15/177
摘要： To provide a compact, high-performance zoom lens having a small lens aperture for enlarging an image from a light bulb such as a DMD for forming an image by changing a reflecting direction of light and projecting the image so enlarged on to a screen or the like, and the zoom lens includes, in order from a magnifying side, a first lens group having a negative refractive power as a whole and a second lens group having a positive refractive power as a whole, wherein changing the magnification of a whole lens system thereof is attained by configuring such that while a magnification varying operation is in effect, the first lens group and the second lens group are made to move on the optical axis.
摘要翻译： 为了提供一种具有小的透镜孔径的小型高性能变焦透镜，用于通过改变光的反射方向并将如此放大的图像投影到屏幕上来放大来自诸如DMD的灯泡的图像以形成图像， 并且变焦透镜从放大侧依次包括作为整体具有负折光力的第一透镜组和具有正折射光焦度的第二透镜组，其中改变整个透镜系统的放大率 通过配置使得在变倍操作有效的同时，使第一透镜组和第二透镜组在光轴上移动。
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公开(公告)号：US5645334A
公开(公告)日：1997-07-08
申请号：US514221
申请日：1995-08-11
CPC分类号： H04N9/317 , H04N5/7441 , H04N9/28
摘要： A projector in which light emitted from a light source is made incident upon a transmission type picture panel and is projected onto a screen through a projection lens system having a condenser lens and an imaging lens. The condenser lens and the imaging lens are relatively movable with respect to the transmission type picture panel in an optical axis direction. Thus, when a projection distance from the projection lens system to the screen is varied, both the condenser lens and the imaging lens are relatively moved, with respect to the transmission type picture panel, to adjust a focus of the emitted light on the screen. A focusing method for the projector is also provided.
摘要翻译： 将从光源发出的光入射到透射型图像面板上并通过具有聚光透镜和摄像透镜的投影透镜系统投影到屏幕上的投影仪。 聚光透镜和成像透镜相对于透射型图像面板在光轴方向上相对移动。 因此，当从投影透镜系统到屏幕的投影距离改变时，聚光透镜和成像透镜相对于透射型图像面板相对移动，以将发射光的焦点调整到屏幕上。 还提供了用于投影仪的聚焦方法。
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公开(公告)号：US5442413A
公开(公告)日：1995-08-15
申请号：US153876
申请日：1993-11-17
IPC分类号： G02B27/18 , G02B3/08 , G02B13/16 , G03B21/132 , G03B21/14
CPC分类号： G02B13/16 , G02B3/08 , G03B21/132
摘要： A pupil conjugate-coupling device in a projecting optical system includes a first projection lens system which forms an intermediate image of an image indicating element, a second projection lens system which projects the intermediate image onto a screen, said first and second projection lens systems having optical axes intersecting at a predetermined angle, and an optical element having structural periodicity positioned between the first and second projection lens systems. The optical element has a positive power and a prism function for deflecting a bundle of rays transmitted through the first projection lens system towards the optical axis of the second projection lens system to thereby couple pupils of the first and second projection lens systems. The optical element is deviated from an intermediate image forming position by a predetermined offset in the optical axis direction thereof.
摘要翻译： 投影光学系统中的瞳孔共轭耦合装置包括形成图像指示元件的中间图像的第一投影透镜系统，将中间图像投影到屏幕上的第二投影透镜系统，所述第一和第二投影透镜系统具有 光轴以预定角度相交，以及具有定位在第一和第二投影透镜系统之间的结构周期的光学元件。 光学元件具有正功率和棱镜功能，用于使通过第一投影透镜系统透射的光束偏转到第二投影透镜系统的光轴，从而耦合第一和第二投影透镜系统的光瞳。 光学元件在中间图像形成位置沿光轴方向偏移预定的偏移。
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9.发明授权Distance measuring device and projector including same distance measuring device 有权距离测量装置和投影仪包括相同的距离测量装置公开(公告)号：US08002416B2
公开(公告)日：2011-08-23
申请号：US12204204
申请日：2008-09-04
申请人： Yasuyuki Tejima
发明人： Yasuyuki Tejima
摘要： There are provided a small distance measuring device which enables an accurate distance measurement and has a wide range of measurable distances and a projector which is provided with the distance measuring device.A projector includes a light source unit, a light source side optical system for guiding light from the light source unit to a display device, the display device, a projection side optical system for projecting an image emitted from the display device on to a screen, and a distance measuring device and has a projector control unit for controlling the light source unit and the display device, and the distance measuring device includes a distance calculating part for calculating distances to a plurality of point on the screen and a mean distance thereof, and the projector control means includes an inclination angle calculating part for calculating an inclination angle of the screen based on the distances to the plurality of points on the screen calculated by the distance calculating part and a distortion correcting part for preparing image data of a projected image which has been corrected for distortion from information calculated by the distance calculating part 45 and the inclination calculating part.
摘要翻译： 提供了一种小距离测量装置，其能够进行精确的距离测量并且具有宽范围的可测量距离，以及设置有距离测量装置的投影仪。 投影机包括光源单元，用于将来自光源单元的光引导到显示装置的光源侧光学系统，显示装置，用于将从显示装置发射的图像投影到屏幕上的投影侧光学系统， 距离测量装置，具有用于控制光源单元和显示装置的投影仪控制单元，测距装置包括：距离计算部，用于计算与屏幕上的多个点的距离及其平均距离;以及 投影仪控制装置包括倾斜角度计算部分，用于基于距离计算部分计算出的屏幕上的多个点的距离和用于准备投影图像的图像数据的失真校正部分来计算屏幕的倾斜角度，该倾斜角度计算部分 已被距离计算部45计算的信息和倾斜度的畸变校正 计算部分。
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公开(公告)号：US07619833B2
公开(公告)日：2009-11-17
申请号：US12001873
申请日：2007-12-13
申请人： Etsuro Kawakami , Yasuyuki Tejima
发明人： Etsuro Kawakami , Yasuyuki Tejima
IPC分类号： G02B9/04
摘要： A high-performance lens system includes lens elements of small diameters for projecting enlarged images from light valves (mainly Digital Micromirror Devices (DMDs)) for forming images by changing reflecting directions of light. The lens system includes, sequentially in order from a magnifying side, a first lens group which makes up a substantially afocal optical system as a whole and a second lens group having a positive refractive power as a whole. Depending on the application a third lens group made up of a single positive lens element is provided in the vicinity of the light valve on a contracting side of the second lens group.
摘要翻译： 高性能透镜系统包括用于从光阀（主要是数字微镜器件（DMD））放大的图像的小直径的透镜元件，用于通过改变光的反射方向形成图像。 透镜系统从放大侧依次包括构成基本上无焦的光学系统作为整体的第一透镜组和具有整个正屈光力的第二透镜组。 根据应用，在第二透镜组的收缩侧的光阀附近设置由单个正透镜元件组成的第三透镜组。
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