Optical device enabling the introduction of a collimated image i

Details Optical device enabling the introduction of a collimated image i Optical device enabling the introduction of a collimated image i

1990-05-15

1991-12-31

Henry, Jon W.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

G02B 2710, G02B 2714

Patent

active

050766643

ABSTRACT:
Disclosed is an optical device designed to enable an observer to look simultaneously at what is normally in his field of vision and at a colllimated image introduced so as to be superimposed on his field of vision, by total reflections in a strip with parallel faces forming an optical guide. This introduction of a superimposed image is done by means of successive, parallel semi-reflecting panels positioned in the strip and treated so as to be reflective at angles of incidence that get ever smaller with distance from the generator that gives the image. The outside scene is seen, by transparency, through the panels. This device especially concerns helmets for pilots in the field of aeronautics.

REFERENCES:
patent: 4099841 (1978-07-01), Ellis
patent: 4361384 (1982-11-01), Bosserman
patent: 4711512 (1987-12-01), Upathieks

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