Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1989-01-23
1999-03-09
Arnold, Bruce Y.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359629, 359630, G02B 2714
Patent
active
058808884
ABSTRACT:
An apparatus for combining a display image with the field of view of a viewer. Light from either a night vision system (14) of a CRT (12) is directed into an eyepiece assembly (18). The eyepiece magnifies and focuses the image into a combiner (30). The combiner (30) consists of an elongated optical element with two parallel sides (36) and (38) and two concave reflective surfaces (32) and (34) at each end. Light entering the combiner (30) is reflected off the first reflective surface (32) and then is reflected back and forth between the sides of the combiner (36) and (38) and then onto the second reflective surface (32). Light reflected off the second reflective surface (32) is combined with light entering from the field of view of the viewer through a prism element (44). The result is that the display image is superimposed in the field of view of the viewer. The system is light in weight, does not protrude significantly from the user's head, introduces minimal distortion and offers a wide field view.
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SPIE, Display System Optics, vol. 778 (1987) "An Integral Approach to Helmet Display System Design" pp. 83-88 Melzoc et al.
Rotier Donald J.
Schoenmakers Wayne P.
Arnold Bruce Y.
Denson-Low Wanda K.
Hughes Aircraft Company
Nguyen Thong
Sales Michael W.
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