Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1982-11-29
1985-09-03
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351218, A61B 310
Patent
active
045388890
ABSTRACT:
The inventive manual ophthalmoscope is provided with a housing 1 which is closed on all sides and in which the optical components 7, 8, 9, 13, 14 are housed in an entirely dustproof manner. The necessary switching operations for interposing correction lenses 15, 16, lighting field masks, color filters etc. into the illumination and/or observation light path 2, 3 are effected by electomagnetic drives 17, 18, 19, 20 which are adapted to be operated by means of operating elements 21, 22, 23 provided on the outside of housing 1 in optimum positions from an ergonomic point of view. The display of refraction values of correction lenses 15, 16 interposed into the observation light path as well as information deducible therefrom is effected in an optoelectronic manner.
REFERENCES:
patent: 3600067 (1971-08-01), Heine
patent: 4200362 (1980-04-01), Pomerantzeff
patent: 4407571 (1983-10-01), Augusto et al.
Heine Helmut A.
Rosenbusch Helmut W.
Schmidt Otto H.
Bovernick Rodney B.
Dzierzynski Paul M.
Heine Optotechnik GmbH & Co.
Propper Manufacturing Co. Inc.
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