Head up display system
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United States of America Patent
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-
Aug 16, 1988
Issued Date -
N/A
app pub date -
Sep 16, 1986
filing date -
Feb 3, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of preventing a reduction in image contrast in a head-up display. The head-up display is comprised of a visual information source, a lens, a wavelength selective reflecting element, and a combiner which reflects at least some of the wavelengths from the information source which reflect off the reflecting element. The reflecting element, in addition to being wavelength selective, is provided with optical power to reduce aberrations which would otherwise result from operating the combiner at an off-axis angle.
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