Helmet systems with eyepiece and eye position sensing means

Details Helmet systems with eyepiece and eye position sensing means Helmet systems with eyepiece and eye position sensing means

1990-07-09

1992-03-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, 340705, 351210, G01V 904, A61B 314, G09G 302

Patent

active

050935674

ABSTRACT:
There is disclosed two helmet systems, each comprising a helmet (11) and, carried by the helmet (11), an optical arrangement (13). In each system, the optical arrangement (13) both provides a collimated display superimposed on the helmet wearer's view of the forward scene through an eyepiece (15 or 50) of the arrangement (13), and senses the angular position of that eye of the helmet wearer looking through the eyepiece (15 or 50) with respect to the helmet axes. The optical arrangement (13) senses such angular position by sensing the position, within a sensing area of a sensor (37 or 72), of the point focus of infra-red radiation, from an infra-red point source (35 or 71A), reflected by the eye, and producing an electrical output representative of this position. In one helmet system the eyepiece (15) is of the open optics type and in the other the eyepiece (50) is of the solid optics type.

REFERENCES:
patent: 4439755 (1984-03-01), La Russa
patent: 4722601 (1988-02-01), McFarlane
patent: 4852988 (1989-08-01), Velez et al.
patent: 4961626 (1990-10-01), Fournier, Jr. et al.
patent: 4994794 (1991-02-01), Price et al.
Stephenson et al., "A Helmet-Mounted Sight System for Fighter Aircraft", GEC Journ. of Sci. & Tech., vol.46, No. 1, (1980), pp. 33-38.

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