Holographic illumination system

Details Holographic illumination system Holographic illumination system

1999-09-14

2000-09-05

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 22, 359 24, 359618, 359634, 353 30, 353 31, G02B 532

Patent

active

061151521

ABSTRACT:
Holographic optical elements (HOEs) can be used in systems and methods for providing illumination and for projecting images. The HOEs may be switchable HOEs, whose diffractive properties can be controlled. Described herein is a method of combining light from two or more illumination sources. In one embodiment, a reflection-type HOE is illuminated by the first illumination source. The HOE diffracts light from the first illumination source into an output direction. Light from the second illumination source is transmitted through the HOE and onto a reflective optical element, which reflects the light back through the HOE and into the same output direction. Also described is a projection system that uses two or more HOEs to combine two or more colors of light for use by a single image display. The system includes one or more light sources, an image display (such as a reflective or transmissive LCD display or a MEMS display, for example), and a first and a second HOE. The HOEs are each mounted between a light source and the image display, and configured to provide one color of light to the image display and from the image display into an output direction. In one embodiment, the HOEs are switchable HOEs and can be used for color-sequential display and/or for color balancing.

REFERENCES:
patent: 3807829 (1974-04-01), Close
patent: 4458981 (1984-07-01), Huignard
patent: 4500163 (1985-02-01), Burns et al.
patent: 4669812 (1987-06-01), Hoebing
patent: 4790613 (1988-12-01), Moss
patent: 4799739 (1989-01-01), Newswanger
patent: 4807951 (1989-02-01), Moss
patent: 4834473 (1989-05-01), Keyes, IV et al.
patent: 4834476 (1989-05-01), Benton
patent: 4932731 (1990-06-01), Suzuki et al.
patent: 4981332 (1991-01-01), Smith et al.
patent: 4993790 (1991-02-01), Vick
patent: 5011244 (1991-04-01), Smith
patent: 5014709 (1991-05-01), Bjelkhagen et al.
patent: 5024494 (1991-06-01), Williams et al.
patent: 5035474 (1991-07-01), Moss
patent: 5036385 (1991-07-01), Eichenlaub et al.
patent: 5044709 (1991-09-01), Smith et al.
patent: 5071209 (1991-12-01), Chang
patent: 5093563 (1992-03-01), Small et al.
patent: 5111313 (1992-05-01), Shires
patent: 5151724 (1992-09-01), Kikinis
patent: 5227898 (1993-07-01), Iavecchia et al.
patent: 5278532 (1994-01-01), Hegg et al.
patent: 5299035 (1994-03-01), Leith et al.
patent: 5305124 (1994-04-01), Chern et al.
patent: 5341229 (1994-08-01), Rowan
patent: 5379133 (1995-01-01), Kirk
patent: 5424866 (1995-06-01), Kikinis
patent: 5440428 (1995-08-01), Hegg et al.
patent: 5471327 (1995-11-01), Tedesco et al.
patent: 5506701 (1996-04-01), Ichikawa
patent: 5521724 (1996-05-01), Shires
patent: 5537232 (1996-07-01), Biles
patent: 5557283 (1996-09-01), Sheen et al.
patent: 5561537 (1996-10-01), Aritake et al.
patent: 5568313 (1996-10-01), Steenblick
patent: 5570208 (1996-10-01), Kato et al.
patent: 5581378 (1996-12-01), Kulick
patent: 5589957 (1996-12-01), Aritake et al.
patent: 5606455 (1997-02-01), Eichenlaub
patent: 5608552 (1997-03-01), Smith
patent: 5615023 (1997-03-01), Yang
patent: 5617225 (1997-04-01), Aritake et al.
patent: 5644414 (1997-07-01), Kato et al.
patent: 5680231 (1997-10-01), Grinberg et al.
patent: 5696552 (1997-12-01), Aritake et al.
patent: 5703702 (1997-12-01), Crane et al.
patent: 5717509 (1998-02-01), Kato et al.
patent: 5729366 (1998-03-01), Yang et al.
patent: 5736958 (1998-04-01), Turpin
patent: 5751243 (1998-05-01), Turpin
patent: 5757522 (1998-05-01), Kulick et al.
patent: 5760933 (1998-06-01), Aritake et al.
patent: 5774175 (1998-06-01), Hattori
patent: 5777742 (1998-07-01), Marron
patent: 5790284 (1998-08-01), Taniguchi et al.
patent: 5796498 (1998-08-01), French
patent: 5796499 (1998-08-01), Wenyon
patent: 5808759 (1998-09-01), Okamori et al.
patent: 5815222 (1998-09-01), Matsuda et al.
patent: 5825448 (1998-10-01), Bos et al.
patent: 5825540 (1998-10-01), Gold et al.
patent: 5942157 (1999-08-01), Sutherland et al.
Tanaka, et al. "Holographically Formed Liquid-Crystal/Polymer Device For Reflective Color Display", 2320 Journal of the Society for Information Display 2 (1994) Apr. No. 1, New York, US.

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