Eye direction detecting device

Details Eye direction detecting device Eye direction detecting device

1996-05-24

1997-03-04

Perkey, W. B.

Photography

Eye tracking

351210, G03B 1302, A61B 310

Patent

active

056084897

ABSTRACT:
An anamorphic lens system in an eye direction detection device, applied to an observing optical system, modifies illumination light from a light source to be parallel in a lateral direction of a user's eye positioned to look through the observing optical system, dispersed in a vertical direction of the position of the user's eye, and substantially centered on the position of the user's eye. The anamorphic lens system transmits the illumination light from the light source to an illumination light exit surface positioned away from the optical axis of the observing optical system, and the illumination light is projected toward the position of the user's eye from the illumination light exit surface to separate signals from the image of the eye and an image formed by eyeglasses, if worn. The illumination light exit surface is a rectangular window having a longitudinal side parallel to longitudinal side of a field of view of the observing optical system, and is positioned below the position of a user's eye.

REFERENCES:
patent: 5155516 (1992-10-01), Shindo
patent: 5327191 (1994-07-01), Shindo et al.

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