Dichroic optical elements for use in a projection type display a

Details Dichroic optical elements for use in a projection type display a Dichroic optical elements for use in a projection type display a

1989-09-06

1992-03-24

Cuchlinski, Jr., William A.

Optics: image projectors

Composite projected image

Multicolor picture

353 33, 353121, 353 34, 359490, 359634, 359831, G02B 2710, G03B 2100

Patent

active

050981838

ABSTRACT:
A dichroic optical element disposed on at least one surface of each of four right angled prisms for transmitting and reflecting different wavelengths of polarized light. Each of the dichroic layers is characterized by wavelength selection properties which vary in response to the polarization of the light received by the dichroic layers. A projection type display device includes a first optical device characterized by at least one first wavelength transition region and a second optical device characterized by at least one second wavelength transition period. The first wavelength transition region does not effectively overlap the second wavelength transition region. Efficient utilization of the light source for projecting an image results.

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"LCD Full-Color Video Projector", by Shinji Morozumi et al., SID 86 Digest, pp. 375-378.
"9.2: A New Color--TV Projector", by Alexander D. Jacobson et al., SID 77 Digest, pp. 106-107.

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