1983-06-15
1986-04-15
Corbin, John K.
350 37, G02B 532, G02B 2714, H04N 572
Patent
active
045823944
ABSTRACT:
In order to prevent ambient light severely reducing the contrast of a display on a tricolor cathode ray tube, a holographic element having reflection wavelength peaks between the emission wavelength peaks of the cathode ray tube is disposed in the light path from the display to the observer. The holographic plane of reflection is preferably inclined to the substrate plane of the element so as to direct unwanted light away from the observer. The display may be head-down or head-up.
REFERENCES:
patent: 3013114 (1958-02-01), Bridges
patent: 4398799 (1983-08-01), Swift
"The Lantirn Wide Field-of-View Raster Head-Up Display", Berry et al., Conference, Naecon 1981, Proceedings of the IEEE.
Corbin John K.
Davis IV F. Eugene
Pilkington P.E. Limited
Shapiro Bruce S.
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