Optical element, polarization illumination device, and projectio

Details Optical element, polarization illumination device, and projectio Optical element, polarization illumination device, and projectio

1997-12-17

1999-11-02

Shafer, Ricky D.

Optical: systems and elements

Polarization without modulation

Polarizarion by dichroism

359495, 359497, 359250, 359253, 359622, 359627, 359634, 353 20, 353 31, 353 34, 353 37, 362 19, 349 5, G02B 530, G02B 2728, G03B 2100

Patent

active

059781360

ABSTRACT:
Two polarization conversion element arrays are disclosed. Each polarization conversion element array is composed of a plurality of polarization conversion elements for converting light incident upon the polarization conversion element array to a linearly polarized light beam with a predetermined polarization direction. The plurality of polarization conversion elements are disposed opposite to each other with a predetermined space provided between at about the center of the light-outgoing surface of a lens array in the direction of arrangement. Of the light beams (s-polarized+p-polarized light beams) gathered by the lens array, light beam that is not incident upon the polarization conversion element and passes through the predetermined space is a light beam including a predetermined polarized light beam (s-polarized light beam) that is primarily made to leave the array 320a and an ineffective polarized light beam (p-polarized light beam). Of the light passing through and leaving the space, the required polarized light beam alone can be made to leave as an effective light beam by providing a polarization plate or the like at the light-outgoing side of the space.

REFERENCES:
patent: 2748659 (1956-06-01), Geffcken et al.
patent: 2821114 (1958-01-01), Wiemer et al.
patent: 5283600 (1994-02-01), Imai
patent: 5381278 (1995-01-01), Shingaki et al.
patent: 5555186 (1996-09-01), Shioya
patent: 5566367 (1996-10-01), Mitsutake et al.
patent: 5626409 (1997-05-01), Nakayama et al.
patent: 5650873 (1997-07-01), Gal et al.
patent: 5751480 (1998-05-01), Kitagishi
patent: 5764412 (1998-06-01), Suzuki et al.
patent: 5865521 (1999-02-01), Hashizume et al.
Patent Abstracts of Japan, JP 07 29406 A, Nov. 10, 1995.
Kunio Yoneno et al., "High Definition Front Projector Using Poly-Si TFT LCD" Conference Record of the 1991 International Display Research Conference, Oct. 15, 1991, pp. 147-150, XP000314344, Abstract, Fig. 1.

Affiliated with

Also associated with

Rating

Optical element, polarization illumination device, and projectio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical element, polarization illumination device, and projectio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical element, polarization illumination device, and projectio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2143549