Display arrangements for head-up display systems

Details Display arrangements for head-up display systems Display arrangements for head-up display systems

1985-01-30

1987-03-24

Caldwell, Sr., John W.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340980, 350174, 434 44, G02B 2710

Patent

active

046528709

ABSTRACT:
A display arrangement for a head-up display system e.g. for an aircraft, wherein the combiner (13) comprises a first tuned reflective optical film (39) through which an observer (14) views a distant scene and second and third tuned reflective optical films (41 and 43) positioned outside the observer's view of the distant scene through the first film. Light from a projector (11) passes first through the nearer (43) of the second and third films, is then reflected at the other (41) of the second and third films, is then reflected at the nearer film (43) and then passes through the other film (41) to the first film (39) where it is reflected towards the observer. The three films are normally designed to provide the combiner with a desired optical power, the one (43) of the second and third films nearer the projector suitably being concave toward the other (41) of the second and third films for this purpose.

REFERENCES:
patent: 3547522 (1970-12-01), Schaeffer
patent: 4099841 (1978-07-01), Ellis
patent: 4225215 (1980-09-01), Cojan
patent: 4439010 (1984-03-01), Doty
patent: 4447128 (1984-05-01), Ferrer
patent: 4582389 (1986-04-01), Wood

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