Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1992-05-04
1994-08-23
Henry, Jon W.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359633, 359637, 359858, 359365, G02B 1708, G02B 2710, G02B 510
Patent
active
053412427
ABSTRACT:
A display, for example, for a visor attached to a helmet, the visor having a partially reflecting semi-transparent portion in the view of the wearer and an optical projector for projecting an image onto the semi-transparent portion for reflection therefrom. The semi-transparent portion has a relatively higher reflectivity in a central area thereof and a relatively lower reflectivity in an annular area outside the central area. In one aspect of the invention, the head mounted display includes a projector having a display source whereon an image is formed and an optical system for focusing the image at separate sagittal and tangential foci between the image-forming surface and the semi-transparent portion.
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J. G. Droessler et al, "Tilted Cat Helmet-Mounted Display", Optical Engineering, vol. 29, No. 8, Aug. 1990, Bellingham US pp. 849-854.
Gilboa Pinhas
Gold Alexander
Yaeli Joseph
Elbit Ltd.
Henry Jon W.
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