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    • 6. 发明申请
    • POLARIZATION CONVERSION SYSTEMS FOR STEREOSCOPIC PROJECTION
    • 用于立体投影的极化转换系统
    • WO2008042798A2
    • 2008-04-10
    • PCT/US2007/079958
    • 2007-09-28
    • COLORLINK, INC.SCHUCK, Miller, H.ROBINSON, Michael, G.SHARP, Gary, D.
    • SCHUCK, Miller, H.ROBINSON, Michael, G.SHARP, Gary, D.
    • G02B6/44
    • G03B35/26G02B27/2264G02B27/26G02B27/283G03B21/142G03B21/28G03B35/22H04N13/341
    • A polarization conversion system (PCS) is located in the output light path of a projector. The PCS may include a polarizing beam splitter, a polarization rotating element, a reflecting element, and a polarization switch. Typically, a projector outputs randomly-polarized light. This light is input to the PCS, in which the PCS separates p-polarized light and s-polarized light at the polarizing beam splitter. P- polarized light is directed toward the polarization switch on a first path. The s- polarized light is passed on a second path through the polarization rotating element (e.g., a half- wave plate), thereby transforming it to p-polarized light. A reflecting element directs the transformed polarized light (now p-polarized) along the second path toward the polarization switch. The first and second light paths are ultimately directed toward a projection screen to collectively form a brighter screen image in cinematic applications utilizing polarized light for three-dimensional viewing.
    • 偏振转换系统(PCS)位于投影仪的输出光路中。 PCS可以包括偏振分束器,偏振旋转元件,反射元件和偏振开关。 通常,投影仪输出随机偏振光。 该光被输入到PCS,其中PCS在偏振分束器处分离p偏振光和s偏振光。 P偏振光指向第一路径上的偏振开关。 s偏振光在穿过偏振旋转元件(例如半波片)的第二路径上通过,从而将其变换为p偏振光。 反射元件将沿着第二路径的变换的偏振光(现在p偏振光)引向偏振开关。 第一和第二光路最终定向到投影屏幕,以在使用偏振光进行三维观看的电影应用中共同形成更亮的屏幕图像。
    • 7. 发明申请
    • LIGHT COLLECTORS FOR PROJECTION SYSTEMS
    • 投影系统的光收集器
    • WO2008011480A2
    • 2008-01-24
    • PCT/US2007073809
    • 2007-07-18
    • COLORLINK INCSCHUCK MILLER HROBINSON MICHAEL G
    • SCHUCK MILLER HROBINSON MICHAEL G
    • G03B21/16
    • G02B6/0096G02B27/0994G02B27/283G03B21/2013G03B21/208H04N9/3152H04N9/3158H04N9/3167
    • Disclosed herein are light collectors for use in projection applications. The light collectors gather light from surface emitting sources (e.g., LEDs) of differing color (or same color in some embodiments) using input lightpipes. A light collection system splits the light into orthogonal linear polarization states and efficiently propagates the light by use of a polarizing beamsplitter (PBS) and a reflecting element. Further, the light collection system may efficiently homogenize the light using an output lightpipe in a lightpath from the output of the PBS and the reflecting element. In addition, the light collection system may present a single, linear polarization at the output through the use of a half-wave switch (LC cell) in some embodiments or ColorSelect filter in other embodiments. The light collection system may be integrated into a single, monolithic glass, plastic or combination glass/plastic assembly.
    • 本文公开了用于投影应用的光收集器。 光收集器使用输入光管从不同颜色(或在一些实施例中的相同颜色)的表面发射源(例如,LED)聚集光。 光收集系统将光分成正交的线性偏振状态,并通过使用偏振分束器(PBS)和反射元件有效地传播光。 此外,光收集系统可以使用来自PBS和反射元件的输出的光路中的输出光管来有效均匀化光。 此外,在其它实施例中,光收集系统可以在一些实施例中使用半波开关(LC单元)或ColorSelect滤光片在输出端呈现单一的线性极化。 光收集系统可以集成到单个,单片玻璃,塑料或玻璃/塑料组合中。
    • 8. 发明申请
    • WAVEPLATE COMPENSATION IN PROJECTION POLARIZATION CONVERSION SYSTEM
    • 投影偏光转换系统中的波形补偿
    • WO2011106567A3
    • 2012-01-12
    • PCT/US2011026131
    • 2011-02-24
    • MOTHEW NEILCOLEMAN DAVID ASCHUCK MILLER HSHARP GARY DGILMAN SCOTT E
    • COLEMAN DAVID ASCHUCK MILLER HSHARP GARY DGILMAN SCOTT E
    • G02B27/28G02B5/30G03B35/00
    • G02B27/26G02B27/283G03B21/14G03B35/20G03B35/26H04N13/0459
    • Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a polarization conversion system (PCS). The PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. The PCS may include a polarizing beam splitter, a first optical stack, a reflector and a second quarter wave retarder. The first optical stack may include a rotator, a polarizer, a polarization switch and a first quarter wave retarder. The PCS may receive light from a projector and the PBS may direct the light toward the first optical stack. The light may be converted to a different polarization state as it passes through the first optical stack. The converted light may then be re-directed by a reflecting element to the second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light.
    • 三维投影系统可以是单个投影仪或多个投影仪系统。 这些3D投影系统可以包括偏振转换系统(PCS)。 PCS可以设计用于相对小的投掷比,因此可以被设计成适应小投掷比。 PCS可以包括偏振分束器,第一光学堆叠,反射器和第二四分之一波长延迟器。 第一光学堆叠可以包括旋转器,偏振器,偏振开关和第一四分之一波长延迟器。 PCS可以从投影仪接收光,并且PBS可以将光引导到第一光学堆叠。 当光通过第一光学堆叠时,光可以被转换成不同的偏振状态。 转换的光然后可以被反射元件重新引导到第二个四分之一波长延迟器。 第二四分之一波长延迟器可以将线性偏振光转换成圆偏振光。