Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1975-09-25
1977-04-19
Dixon, Harold A.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
351 38, A61B 314
Patent
active
040185141
ABSTRACT:
Apparatus for retinal photography comprising an energy supply unit, a hand lens, a foot-operated control unit, and headgear comprising an indirect ophthalmoscope combined with a camera and mounted on a helmet adapted to be worn by the photographer. The headgear is partially suspended from an overhead support by a negator spring and a cable suspension permitting universal movement. Light for examining the retina, and a bright flash of light for photography, are supplied to the headgear over a flexible fiber optics cable under the control of the foot-operated unit and synchronizing contacts on the camera.
REFERENCES:
patent: 3016000 (1962-01-01), Noyori
patent: 3236578 (1966-02-01), Mackworth
patent: 3315680 (1967-04-01), Silbertrust et al.
patent: 3698099 (1972-10-01), Matsura
Dixon Harold A.
Ericson John W.
Polaroid Corporation
Vale John S.
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