Plate-like polarizing element, a polarizing conversion unit prov

Details Plate-like polarizing element, a polarizing conversion unit prov Plate-like polarizing element, a polarizing conversion unit prov

1993-12-08

1996-10-15

Dzierzynski, Paul M.

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

359485, 359495, G02B 530, G02B 2728

Patent

active

055663672

ABSTRACT:
This specification discloses a plate-like polarizing element for converting light into polarized light having a plurality of units arranged along a common plane across the light, each of the units being provided with dividing means for dividing the light into reflected light and transmitted light whose planes of polarization are orthogonal to each other, varying means for varying the polarized state of at least one of the reflected light and the transmitted light to thereby make the planes of polarization of the two lights coincident with each other, and reflecting means for reflecting one of the reflected light and the transmitted light and directing it substantially in the same direction as the direction of travel of the other. The specification also discloses a polarizing conversion unit provided with such plate-like polarizing element, and a projector provided with such unit.

REFERENCES:
patent: 2449287 (1948-09-01), Flood
patent: 2748659 (1956-06-01), Geffcken et al.
patent: 2810324 (1957-10-01), Marks
patent: 2868076 (1959-01-01), Geffcken et al.
patent: 3876285 (1975-04-01), Schwarzmuller
patent: 4560999 (1985-12-01), Tokuhara
patent: 4827334 (1989-05-01), Johnson et al.
patent: 4864390 (1989-09-01), McKechnie et al.
patent: 4989076 (1991-01-01), Owada et al.
patent: 5073830 (1991-12-01), Loucks
patent: 5124841 (1992-06-01), Oishi
European Patent Office: Patent Abstracts of Japan, Publication #: JP62059919, Date: 16 Mar. 1987.

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