Transmissive phase plate, polarized beam splitter, and...

Details Transmissive phase plate, polarized beam splitter, and... Transmissive phase plate, polarized beam splitter, and...

2006-11-03

2009-11-03

Shafer, Ricky D (Department: 2872)

Optical: systems and elements

Polarization without modulation

Polarizarion by dichroism

C359S490020, C359S583000, C359S247000, C359S263000

Reexamination Certificate

active

07612939

ABSTRACT:
A transmissive phase plate with a function of correcting direction of polarization of light rays in an incident divergent or convergent light flux in addition to functions as a wave plate. Conditions of polarization of incident light rays are corrected by a polarization-correcting optical multi-layer coating which is formed by alternately depositing a high refractivity layer and a low refractivity layer on curved substrative surface of a predetermined radius of curvature. The transmissive phase plate can be applied to correct conditions of polarization of incident light rays of a polarized beam splitter for the purpose of improving contrast ratio of a projection display.

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