Retinoscope with external control sleeve

Details Retinoscope with external control sleeve Retinoscope with external control sleeve

1991-09-11

1993-02-23

Arnold, Bruce Y.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 351213, A61B 310

Patent

active

051894491

ABSTRACT:
A streak retinoscope has an external control sleeve that is fully rotatable and is movable axially for rotating the lamp and focusing the lens assembly, respectively. The lens assembly is carried on the lens holder and the lamp assembly is carried on a lamp carrier. The lamp carrier is rotatable but is held against axial motion, while the lens holder sleeve is held against rotation but is movable axially. A sliding gear arrangement is formed wherein the lamp carrier sleeve is configured with axially elongated teeth, thus serving as a sun gear. The outer control sleeve has internal teeth and serves as the ring gear. Planet gears can be carried on the lens carrier sleeve.

REFERENCES:
patent: 2501438 (1951-03-01), Copeland
patent: 3439978 (1969-04-01), Moore et al.

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