Method and device for measuring diopters of astigmatic lenses

Details Method and device for measuring diopters of astigmatic lenses Method and device for measuring diopters of astigmatic lenses

1977-05-13

1979-07-31

Clark, Conrad J.

Optics: measuring and testing

Lens or reflective image former testing

Focal length measuring

G01B 900

Patent

active

041628527

ABSTRACT:
Lens diopter measuring device includes a first and a second diopter scales which have the same but oppositely directed graduations. Correct identification of the diopters of an astigmatic lens can be obtained by bringing the second scale to zero reading at the first focus position and then adjusting the device to the second focus position.

REFERENCES:
patent: 3266368 (1966-08-01), Santinelli

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