| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a trim retarder using a single-layer birefringent crystal. <P>SOLUTION: The single-layer birefringent crystal trim retarder includes a single layer of birefringent crystal cut such that its optic axis is at a high oblique angle with respect to the retarder normal, thereby forming an O-plate and such that it provides low in-plane retardance values even when the birefringent crystal is relatively thick. To compensate for the inherent high +C-plate retardance of this high-tilt O-plate, the single-layer birefringent crystal is coupled with a -C-plate thin-film retarders, which include a periodic stack of dielectric layers, to provide a trim retarder having an overall A/-C-plate retarder functionality. This full-function trim retarder is practical to fabricate, is thickness and azimuthal angle tolerant, and is suitable for low sensitivity angular clocking requirements of LCoS panel compensation. <P>COPYRIGHT: (C)2009,JPO&INPIT |
