Polarization converter for converting unpolarized light to linea

Details Polarization converter for converting unpolarized light to linea Polarization converter for converting unpolarized light to linea

1991-07-26

1992-11-17

Arnold, Bruce Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359495, 359496, G02B 2728, G02F 101

Patent

active

051648547

ABSTRACT:
There is provided a polarization converter for producing a beam of linearly polarized light from a randomly polarized light. The randomly polarized light is separated into a first polarized light which is projected in a first predetermined direction and a second polarized light having a predetermined angular relationship with the first polarized light. The second polarized light is converted into a third polarized light a polarization of which is identical to that of the first polarized light. By providing a predetermined two-dimensional positional relationship between the first and third polarized lights, the beam of linearly polarized light is produced and advanced on the outside of the converter in a second predetermined direction.

REFERENCES:
patent: 3753608 (1973-08-01), Bernal
patent: 4125843 (1978-11-01), Whitby
patent: 4564931 (1986-01-01), O'Hara et al.
patent: 4682311 (1987-07-01), Matsubayashi et al.
patent: 4802736 (1989-02-01), Gardner et al.
patent: 5042921 (1991-08-01), Sato et al.
patent: 5048926 (1991-09-01), Tanimoto
Imai et al, "Polarization Converter for High Brightness Projection Optical System of Liquid Crystal Light Valve Projector", 1989 Fall Convention of the Institute of Electronics, Information and Communication Engineers, Preprint No. 5, p. 34.

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