Convergence mechanism for binocular refracting instrument

Details Convergence mechanism for binocular refracting instrument Convergence mechanism for binocular refracting instrument

1979-02-28

1981-01-06

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 26, 351 5, A61B 302, A61B 310

Patent

active

042433045

ABSTRACT:
A mechanism which has a continuously variable amount of convergence and inward movement over the entire range of pupillary distance (PD) settings is disclosed. The repositioning of a pair of straight tracks transfers a continuously variable amount of motion to a pair of respective levers that control the position of a pair of carriages relative to the PD control and the angular relationship of lens batteries relative to the respective carriages.

REFERENCES:
patent: 2293200 (1960-02-01), Wright
patent: 3413056 (1968-11-01), Ishihara

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