Head up display system

Details Head up display system Head up display system

1986-09-16

1988-08-16

Arnold, Bruce Y.

350 37, 350 372, 350174, G02B 532, G02B 2714

Patent

active

047639903

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.

REFERENCES:
patent: 3940204 (1976-02-01), Withrington
patent: 4412719 (1983-11-01), Fienup
patent: 4447128 (1984-05-01), Ferrer
patent: 4457579 (1984-07-01), Thylen
patent: 4613200 (1986-09-01), Hartman
Rao et al, "Holographic Methods for the Fabrication of Various Types of Mirrors", Rev. Sci. Instrum., 51(6), Jun. 1980, pp. 809-814.

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