Helmet mounted display with improved brightness

Details Helmet mounted display with improved brightness Helmet mounted display with improved brightness

1987-07-29

1989-08-22

Arnold, Bruce Y.

350 37, 350 372, 350172, G02B 2714

Patent

active

048590304

ABSTRACT:
A helmet mounted display in which a filter receives rays of light at various angles of incidence from an image to be superimposed on the scene being viewed by the operator and reflects these rays to a second surface where the rays are re-reflected through the filter and to the eye of the observer characterized in that the filter is coated in such a manner that it reflects from each position on its surface rays from the image that strike at predetermined angles of incidence but which transmits at each position rays which are received from the second surface.

REFERENCES:
patent: 4099841 (1978-07-01), Ellis
patent: 4261647 (1981-04-01), Ellis
patent: 4407564 (1983-10-01), Ellis
patent: 4600271 (1986-07-01), Boyer et al.
patent: 4688879 (1987-08-01), Fairchild
"Thin Film Optical Filter", 2nd Edition, by H. A. MacLeod and published by McMillan Publishing Co., (Chpts. 8 and 5).

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