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    • 1. 发明授权
    • Projector lens system having three lens groups for image projector
    • 具有用于图像投影仪的三个透镜组的投影仪透镜系统
    • US5357289A
    • 1994-10-18
    • US180705
    • 1994-01-13
    • Toshio KonnoShintaro NakagakiIghiro NegishiTetsuji SuzukiFujiko TatsumiRyusaku TakahashiKeiichi Maeno
    • Toshio KonnoShintaro NakagakiIghiro NegishiTetsuji SuzukiFujiko TatsumiRyusaku TakahashiKeiichi Maeno
    • G02B27/10G02B13/00G03B21/00G03B33/12H04N5/44H04N5/74H04N9/31
    • H04N9/3105H04N5/7441H04N7/0122
    • This specification discloses an image projector for projecting a tri-color composite optical image on a screen as a magnified optical image. A reading light beam emitted from a light source is separated into three color beams, e.g., Red, Green and Blue color beams through a tri-color separation and composition optical system. The separated color beams are irradiated on image forming devices provided correspondingly with Red, Green and Blue color images to read out color images respectively therefrom. Each of the reflected light beams from the image forming device carrying color image information impinges again on the tri-color separation and composition optical system to compose a composite image beam. The composite image beam is projected on the screen through an optical lens system comprising a first lens group, a second lens group and a third lens group disposed along an optical axis in order. The first lens group forms a composite color image on the second lens group by focusing the composite image beam from the tri-color separation and composition optical system. The second lens group converges the composite image beam therefrom to the third lens group. The third lens group projects the composite image beam on the screen as a magnified image. A focal length of the lens system is arranged shorter than a back-focal length defined as a distance between the front surface of the first lens group and a object focal point thereof.
    • 本说明书公开了一种用于在屏幕上投影三色复合光学图像作为放大的光学图像的图像投影仪。 从光源发射的读取光束通过三色分离和组合光学系统分离成三色光束,例如红色,绿色和蓝色光束。 分离的彩色光束照射在相应于红色,绿色和蓝色彩色图像的图像形成装置上,以分别从中读出彩色图像。 来自携带彩色图像信息的图像形成装置的每个反射光束再次入射到三色分离和组合光学系统上以构成合成图像束。 复合图像束通过包括依次设置在光轴上的第一透镜组,第二透镜组和第三透镜组的光学透镜系统投影在屏幕上。 第一透镜组通过聚焦来自三色分离和组合光学系统的合成图像束在第二透镜组上形成复合彩色图像。 第二透镜组将合成图像束从其收敛到第三透镜组。 第三透镜组将合成图像束投影在屏幕上作为放大图像。 布置透镜系统的焦距比被定义为第一透镜组的前表面和其物体焦点之间的距离的后焦距短。
    • 2. 发明授权
    • Driving method for photoconductive-type SLM
    • 光导型SLM的驱动方法
    • US5294992A
    • 1994-03-15
    • US878080
    • 1992-05-04
    • Toshio KonnoShintaro NakagakiIchiro NegishiTetsuji SuzukiFujiko TatsumiRyusaku TakahashiKeiichi Maeno
    • Toshio KonnoShintaro NakagakiIchiro NegishiTetsuji SuzukiFujiko TatsumiRyusaku TakahashiKeiichi Maeno
    • G02F1/05G02F1/135G09F9/33G09G3/00H04N5/74
    • G09G3/002G02F1/135G09G3/02
    • A light-light transfer method using a spatial light modulator realizes an image display with a high utilizing of light without causing an undesirable residual image. The spatial light modulator is constituted to include two electrodes and at least a photoconductor layer member and a photo-modulation layer member used in a birefringence operating mode both being sandwiched between the two electrodes. A writing light is entered from the photoconductive layer member side so that its exposure value varies from the minimum exposure value to the maximum exposure value in a condition that a predetermined operation voltage is supplied between the two electrodes. In this instant, a voltage applied between both ends of the photo-modulation layer member corresponds to a voltage obtained by subtracting a voltage drop amount, occurring in the photoconductor layer member due to an incidence of the writing light, from said predetermined operation voltage applied in advance between said two electrodes. An operational condition of the spatial light modulator is set so that the voltage applied between both ends of the photo-modulation layer member becomes a voltage monotonously exceeding a voltage value corresponding to an extreme value of a degree of photo-modulation in a characteristic curve showing a relationship between an applied voltage and a degree of photo-modulation in the photo-modulation layer member, at the timing when the writing light of the maximum exposure value is entered into the spatial light modulator.
    • 使用空间光调制器的光传输方法利用光的高利用率实现图像显示,而不会引起不期望的残留图像。 空间光调制器被构造为包括两个电极和至少一个光电导体层构件和用于双折射操作模式的光调制层构件,两者都夹在两个电极之间。 在光电导层部件侧进入写入光,使得其曝光值在两个电极之间提供预定操作电压的条件下,从最小曝光值变化到最大曝光值。 在该时刻,施加在光调制层构件的两端之间的电压对应于通过从施加的预定操作电压减去由于写入光的入射而在光电导体层构件中发生的电压降量而获得的电压 提前在所述两个电极之间。 空间光调制器的操作条件被设置为使得在光电调制层部件的两端之间施加的电压在特性曲线中变为单调超过对应于光调制度的极值的电压值的电压, 在最大曝光值的写入光进入空间光调制器的时刻,光电调制层部件中的施加电压和光调制度之间的关系。
    • 3. 发明授权
    • Light to light modulator with reading light of specified wavelength
    • 具有指定波长读取光的光对光调制器
    • US5381188A
    • 1995-01-10
    • US878046
    • 1992-05-04
    • Toshio KonnoShintaro NakagakiIchiro NegishiTetsuji SuzukiFujiko TatsumiRyusaku TakahashiKeiichi Maeno
    • Toshio KonnoShintaro NakagakiIchiro NegishiTetsuji SuzukiFujiko TatsumiRyusaku TakahashiKeiichi Maeno
    • G02F1/135G09F9/33G09G3/00H04N5/74
    • G09G3/002G09G3/02
    • The present invention offers a display system for displaying information comprising a linear array of N light-emitting devices emitting light of predetermined wavelength, the devices are arranged respectively with N pixels, a stream of the information is divided into pieces each of which containing the N pixels, and the N light-emitting devices are caused to emit N light beams simultaneously in a form of array during a given period for every divided piece of the information, the every divided piece of information may correspond to one line of a frame of picture, the N light beams are intensity-modulated respectively with the divided piece of the information, the N light beams are deflected simultaneously in a direction perpendicular to a direction of the array of the N light beams, and a spatial light modulator having a photoconductive layer and a light modulation layer interposed between a pair of electrodes, the photoconductive layer is responsive to the deflected N light beams incident thereto through a focusing lens as a writing light, and a reading light of visible wavelength which is shorter than the predetermined wavelength of the emitted light from the linear array of the N light-emitting devices, the reading light irradiates the photomodulation layer of the spatial light modulator to read out and display the written information thereon.
    • 本发明提供了一种显示系统,用于显示包括发射预定波长的光的N个发光装置的线性阵列的信息,该装置分别具有N个像素,信息流被分成各自包含N个 像素,并且使N个发光器件在每个分割的信息的给定周期内以阵列的形式同时发射N个光束,每个分割的信息可以对应于一帧图像的一行 分别用分割的信息对N个光束进行强度调制,N个光束在与N个光束的阵列的方向垂直的方向上同时偏转,并且具有光导层的空间光调制器 以及插入在一对电极之间的光调制层,光电导层响应于偏转的N个光束 通过作为书写光的聚焦透镜和与N个发光器件的线阵列相比发射光的预定波长短的可见波长的读取光,读取光照射光电调制层 空间光调制器读出并显示其上的书面信息。