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    Adjustable screen frame for rear projection screen or the like
    1.
    发明授权
    Adjustable screen frame for rear projection screen or the like 失效
    可调节屏幕用于后投影屏幕或类似

    公开(公告)号：US3583466A

    公开(公告)日：1971-06-08

    申请号：US3583466D

    申请日：1969-12-17

    Applicant: POLACOAT INC

    Inventor： DREYER JOHN F

    IPC: G03B21/58 ,  A47G5/00

    CPC classification number: G03B21/58

    Abstract: An adjustable screen frame assembly composed essentially of tubular members which are rectangular in cross section, the tubular members defining the corners legs, and side parts of the screen frame, the frame assembly including T-shaped sections which are telescopically received in the tubular parts and wedged into multiple point clamping engagement therewith by means of adjustment bolts, the frame forming parts being provided with means for readily attaching a screen or the like thereto.

    Method of making light polarizing patterns
    3.
    发明授权
    Method of making light polarizing patterns 失效
    制作光极化图案的方法

    公开(公告)号：US3658616A

    公开(公告)日：1972-04-25

    申请号：US3658616D

    申请日：1969-09-17

    Applicant: POLACOAT INC

    Inventor： DREYER JOHN F

    IPC: B42D15/00 ,  B44C1/17 ,  B44C1/16

    CPC classification number: B44C1/1733 ,  B42D25/29 ,  Y10T428/24802

    Abstract: Methods for making patterns comprising areas different with respect to their light polarizing properties by selective removal of portions of a continuous polarizing film, such as of a dichroic dye, from a carrier therefor to define all or a portion of said areas. Selective removal may be by destructive removal of the dye film from the carrier, or by transfer of portions thereof to a receptor surface.

    Abstract translation: 通过从其载体上选择性除去连续的偏振膜的一部分，例如二色性染料的部分，制造包括相对于其光偏振性不同的区域的图案的方法，以限定所述或所述区域的全部或一部分。 选择性去除可以通过从载体上破坏性去除染料膜，或者通过将其部分转移到受体表面。

    Rear projection screen
    6.
    发明授权
    Rear projection screen 失效
    后投影屏幕

    公开(公告)号：US3705757A

    公开(公告)日：1972-12-12

    申请号：US3705757D

    申请日：1971-04-05

    Applicant: POLACOAT INC

    Inventor： HUBER DOUGLAS B

    IPC: G03B21/62 ,  G03B21/60

    CPC classification number: G03B21/62 ,  Y10T428/25

    Abstract: A rear projection screen which is essentially free from scintillation, said screen being composed of two essentially parallel screen surfaces lying in closely spaced apart relation, one of said surfaces comprising a refraction lens system composed of lens defining transparent articles contained in a plastic carrier coating, the other surface of said screen comprising either a second refractive lens system or a light transmissive matte surface which acts as a refractive system, said systems each acting to disperse light passing therethrough at different wave lengths to individually produce scintillation effects, said two systems jointly acting to counterbalance their respective scintillation effects to provide a screen which is essentially free from scintillation.

    Abstract translation: 一种基本上不闪烁的背投屏幕，所述屏幕由两个基本平行的屏幕表面构成，所述两个基本上平行的屏幕表面处于紧密间隔的关系中，所述表面之一包括折射透镜系统，所述折射透镜系统由透明物体构成，所述透镜包含在塑料载体涂层中， 所述屏幕的另一表面包括用作折射系统的第二折射透镜系统或透光锍表面，所述系统各自用于分散以不同波长通过的光以分别产生闪烁效应，所述两个系统共同作用 以平衡其各自的闪烁效应，以提供基本上不闪烁的屏幕。

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