公开(公告)号：US20130100414A1

公开(公告)日：2013-04-25

申请号：US13710356

申请日：2012-12-10

Applicant: Reald Inc.

Inventor： David A. Coleman ,  Miller H. Schuck ,  Gary D. Sharp

IPC: G02B27/26 ,  G03B21/14 ,  G02B27/28

CPC classification number: G02B27/26 ,  G02B27/283 ,  G03B21/14 ,  G03B35/20 ,  G03B35/26 ,  H04N13/363

Abstract: Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a one or more polarization conversion systems (PCS). Each PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. Each 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. Each PCS may receive light from a respective projector, and the PBS in each PCS may direct the light toward the first optical stacks. 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 a second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light.

Abstract translation: 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投影系统可以包括一个或多个偏振转换系统（PCS）。 每个PCS可以被设计用于相对较小的投掷比，并且因此可被设计成适应小投掷比。 每个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。 每个PCS可以从相应的投影仪接收光，并且每个PCS中的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。 转换后的光可以被反射元件重新定向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。