Prism polarizer

Details Prism polarizer Prism polarizer

1981-05-08

1983-07-12

Punter, William H.

350394, 350395, 350400, 350402, G02B 504, G02F 109, G02F 129

Patent

active

043927220

ABSTRACT:
A prism polarizer comprising a pair of anisotropic crystal prisms faced to each other. Each of the crystal prisms comprises a crystal which has an optical characteristic such that the difference between the square of the refractive index for extraordinary rays and the square of the refractive index for ordinary rays is larger than 1. The angle of incidence of a beam upon the facing plane of the pair of prisms is equal to the Brewster angle for the refractive index for P-polarization rays. P-polarization rays are transmitted through the facing plane. S-polarization rays are totally reflected at the facing plane. Thereby, the incident beam is separated into two polarized beams. Each of the pair of prisms is formed so that each polarized beam is totally reflected within each prism and that the separated outlet beams from the pair of prisms are parallel with each other.

REFERENCES:
patent: 2182142 (1939-12-01), Ball et al.
patent: 3449039 (1969-06-01), Hoffman, Jr.
patent: 3449576 (1969-06-01), Hoffman, Jr. et al.

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