Single-layer birefringent crystal trim retarders

Details Single-layer birefringent crystal trim retarders Single-layer birefringent crystal trim retarders

2008-02-08

2011-11-01

Nguyen, Dung (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

C349S118000, C349S119000, C349S137000, C359S489070

Reexamination Certificate

active

08049824

ABSTRACT:
A single-layer birefringent crystal trim retarder includes a birefringent crystal cut such that its optic axis is at a high oblique angle 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 retarder 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.

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