Optical polarization device and projection system of liquid crys

Details Optical polarization device and projection system of liquid crys Optical polarization device and projection system of liquid crys

1996-05-23

1999-05-04

Spyrou, Cassandra

Optical: systems and elements

Polarization without modulation

Polarizarion by dichroism

359483, 359485, G02B 530

Patent

active

059009730

ABSTRACT:
An optical polarization device including a source of light emitting a light beam, and a polarization beam splitter for reflecting the s-polarization component of the light beam and transmitting the p-polarization component. A Fresnel structure with a reflective coating receives the s-polarization component, rotates it 90 degrees and returns it to the beam splitter. A plate of micro-prisms, functioning in reflection total, recombine the two polarization components of the light beam so as to produce a collimated beam.

REFERENCES:
patent: 5042921 (1991-08-01), Sato et al.
patent: 5459592 (1995-10-01), Shibatani et al.
patent: 5587816 (1996-12-01), Gunjima et al.
Patent Abstracts of Japan vol. 018 No. 267 (P-1741), May 20, 1994 & JP A 06 043453 (Casio Comput Co Ltd) Feb. 18, 1994.
Patent Abstracts of Japan vol. 016 No. 252 (P-1367) Jun. 9, 1992 & JP A 04 058214 (Mitsubishi Rayon Co Ltd) Feb. 25, 1992.
Copy of Search Report.

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