Optical system of collimation notably for helmet display unit

Details Optical system of collimation notably for helmet display unit Optical system of collimation notably for helmet display unit

1989-10-19

1995-09-26

Dzierzynski, Paul M.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359630, 359631, G02B 2714

Patent

active

054538777

ABSTRACT:
The system is designed to be mounted in a air pilot's helmet. It uses a confocal assembly with a first parabolic mirror and a second parabolic mirror, placed downline of a collimation objective which gives a collimated radiation. The first mirror is totally reflective and the second mirror is semi-transparent to simultaneously transmit, by reflection, the collimated radiation and, by transparency, for example the view of the external landscape. These two mirrors are integrated into the ends of a plate with two parallel faces. The collimated radiation penetrates the plate by one of the parallel faces, gets reflected on the first mirror, undergoes a succession of total reflections on the parallel faces and then gets reflected on the second mirror before leaving the plate, still doing so through one of the two faces.

REFERENCES:
patent: 3923370 (1975-12-01), Mostrom
patent: 4669810 (1987-06-01), Wood
patent: 4711512 (1987-12-01), Upatnieks
patent: 4729634 (1988-03-01), Raber
patent: 4830464 (1989-05-01), Cheysson et al.
patent: 4859030 (1989-08-01), Rotier
patent: 4874214 (1989-10-01), Cheysson et al.
NAECON '77 Record; pp. 981-990, "Advanced Head-Up Display Technology--The Integrated HUD", Coonrod et al.
"Head-Up Displays--Part 2", Freeman--Optics Technology; Aug. 1969, pp. 175-182.
An Integrated Approach to Helmet Display System Design, SPIE, vol. 778, Display System Optics, 1987, pp. 83-88; J. E. Melzer, et al.

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