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    Overhead projector
    1.
    发明授权
    Overhead projector 失效
    难搞的项目

    公开(公告)号：US5497207A

    公开(公告)日：1996-03-05

    申请号：US297617

    申请日：1994-08-29

    申请人： Hoo-shik Kim

    发明人： Hoo-shik Kim

    IPC分类号： G03B21/132 ,  G03B21/28

    CPC分类号： G03B21/132 ,  Y10S353/04

    摘要： An overhead projector that irradiates light onto an object or a sheet of paper, focuses the light reflected therefrom with a focusing lens, isolates ultraviolet or infrared rays having a specific wavelength among the focused light via a filter, forms an image by irradiating the isolated light onto an image former, and projects the image onto a projection screen by irradiating visible light onto the image former whereby the image is enlarged and projected via a projection lens to thereby obtain a more clear image.

    摘要翻译： 将光照射到物体或纸张上的高架投影仪，用聚焦透镜对其反射的光进行聚焦，通过滤光器隔离聚焦光中的具有特定波长的紫外线或红外线，通过照射孤立光来形成图像 通过将可见光照射到图像形成器上，通过投影透镜放大和投影图像，从而获得更清晰的图像，将图像投影到投影屏幕上。

    Overhead projector
    2.
    发明授权
    Overhead projector 失效
    难搞的项目

    公开(公告)号：US5414480A

    公开(公告)日：1995-05-09

    申请号：US206184

    申请日：1994-03-07

    申请人： Masaaki Morizumi

    发明人： Masaaki Morizumi

    IPC分类号： G02B27/18 ,  G03B5/00 ,  G03B21/132 ,  G03B21/00

    CPC分类号： G03B21/132 ,  Y10S353/04

    摘要： An overhead projector has a flat stage, for placing a sheet material thereon, which is inclined such that a normal line of the flat stage, which is in alignment with the optical axis of the projection lens, inclines an angle relative to a vertical line so that a reflection mirror disposed above the projection lens at an angle of 45 degrees directs an image projected by the projection lens toward a remote screen at a desired angle of elevation.

    摘要翻译： 高架投影仪具有平台，用于在其上放置片材，其倾斜使得与投影透镜的光轴对准的平台的法线相对于垂直线倾斜一定角度，因此 以45度的角度设置在投影透镜上方的反射镜将以投影透镜投射的图像以期望的仰角指向远程屏幕。

    Overhead projector
    3.
    发明授权
    Overhead projector 失效
    难搞的项目

    公开(公告)号：US5317350A

    公开(公告)日：1994-05-31

    申请号：US034463

    申请日：1993-03-19

    申请人： Masaaki Nomura ,  Ko Aosaki ,  Takashi Kubo ,  Kenta Namioka ,  Koji Takanose

    发明人： Masaaki Nomura ,  Ko Aosaki ,  Takashi Kubo ,  Kenta Namioka ,  Koji Takanose

    IPC分类号： G03B21/132 ,  G03B21/08

    CPC分类号： G03B21/132 ,  Y10S353/04

    摘要： An overhead projector has a stage on which original material is placed. The stage has a Fresnel mirror. An electrostatic attracting structure is integral with the Fresnel mirror. The attracting structure includes a conductive membrane of ceramic and a resinous dielectric/protective layer. The conductive membrane consists of a pair of comb-shaped electrodes, which interfinger in coplanar fashion, and are covered by the dielectric/protective layer for insulation and protection. A power supply device applies a high voltage of direct current to the electrodes. The original material is attracted electrostatically by the electrodes, and can be kept flat on the stage. In a preferred embodiment, the power supply device incorporates a self-starting blocking oscillator, which is adapted to boost the voltage sufficiently for electrostatic attraction.

    摘要翻译： 高架投影仪具有放置原始材料的阶段。 舞台上有菲涅尔镜。 静电吸引结构与菲涅尔反射镜是一体的。 吸引结构包括陶瓷的导电膜和树脂电介质/保护层。 导电膜由一对梳状电极组成，其共同的方式连接在一起，并被绝缘和保护的电介质/保护层覆盖。 电源装置向电极施加高电压的直流电。 原材料被电极静电吸引，并可在平台上保持平坦。 在优选实施例中，电源装置包括自启动阻塞振荡器，其适于将电压充分提升以用于静电吸引。

    Folding arm for overhead projector
    4.
    发明授权
    Folding arm for overhead projector 失效
    高架投影机折叠臂

    公开(公告)号：US4978218A

    公开(公告)日：1990-12-18

    申请号：US486971

    申请日：1990-03-01

    申请人： Robert S. Carpenter ,  Dennis J. Roden ,  Ernesto M. Rodriguez

    发明人： Robert S. Carpenter ,  Dennis J. Roden ,  Ernesto M. Rodriguez

    IPC分类号： G03B21/132

    CPC分类号： G03B21/132 ,  Y10S353/04

    摘要： A portable overhead projector having a folding arm. The arm and a torque member are pivotally attached to the projector head, forming a four bar linkage. When the arm is moved from an upright, operative position to a storage position, the projector head rotates so as to be flush with the base of the projector, making the projector more compact for storage. An adjustment mechanism is also provided to automatically open and close a mirror which is attached to the projector head, simplifying the set up procedure of the overhead projector.

    Foldable optical apparatus
    5.
    发明授权
    Foldable optical apparatus 失效
    可折叠光学装置

    公开(公告)号：US4938587A

    公开(公告)日：1990-07-03

    申请号：US352542

    申请日：1989-05-16

    申请人： Kenta Namioka ,  Tokuji Sato ,  Minoru Shiiba ,  Fumio Kikutzugi ,  Hirofumi Kino

    发明人： Kenta Namioka ,  Tokuji Sato ,  Minoru Shiiba ,  Fumio Kikutzugi ,  Hirofumi Kino

    IPC分类号： G03B21/132 ,  G03B21/30

    CPC分类号： G03B21/132 ,  G03B21/30 ,  Y10S353/04

    摘要： An optical apparatus having a base table on which an original is placed and an image forming unit with an optical system which projects an image of the original onto a remote screen for showing the same to a number of viewers. A foldable structure is provided, having a support structure mounted on a base table for movement between a lowered position covering the base table and a raised position wherein the image forming unit is located above the base table so as to form and project the image of the original onto the remote screen. A linkage interconnects the image forming unit and the support structure for causing a movement of the image forming unit relative to the support structure upon movement of the support structure between the folded and unfolded positions, thereby placing the image forming unit above the base table when the supporting means is in the raised position and flush with the support means so as to cover the base table when the support means is in the lowered position.

    摘要翻译： 一种具有放置原稿的基台的光学装置和具有将原稿的图像投射到远程屏幕上以将其显示给多个观看者的光学系统的图像形成单元。 提供了一种可折叠结构，其具有安装在基台上的支撑结构，用于在覆盖基台的下降位置和升高位置之间移动，其中图像形成单元位于基座上方，以便形成和投影图像 原来到远程屏幕上。 连杆将图像形成单元和支撑结构相互连接，用于当支撑结构在折叠位置和展开位置之间移动时使图像形成单元相对于支撑结构移动，从而将图像形成单元放置在基座上方 支撑装置处于升起位置并与支撑装置齐平，以便当支撑装置处于降低位置时覆盖基座。