Target image projector

Details Target image projector Target image projector

1974-09-12

1976-04-20

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 23, 353 94, 353 98, A61B 302, G03B 2126, G03B 2128

Patent

active

039515273

ABSTRACT:
An apparatus for measuring and evaluating a subject's visual field includes a projector for presenting a target image, consisting of a spot of light, at a series of selected locations within the subject's visual field. A mirror is mounted for movement about a pair of axes and is rotated to a desired attitude by step motors which control the position of the mirror about the respective axes. A light beam is directed toward the mirror and is reflected in a direction dependent on the attitude of the mirror as controlled by the step motors.

REFERENCES:
patent: 3235321 (1966-02-01), Jayle et al.
patent: 3283652 (1966-11-01), Busch
patent: 3827789 (1974-08-01), Molner et al.

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