Method of and apparatus for measuring the refractive power of a

Details Method of and apparatus for measuring the refractive power of a Method of and apparatus for measuring the refractive power of a

1981-02-03

1983-07-26

Arnold, Bruce Y.

Optics: measuring and testing

Lens or reflective image former testing

Focal length measuring

G01B 900

Patent

active

043951201

ABSTRACT:
Measurement of the refractive power of a contact lens comprises joining a contact lens to be measured with the surface of a reference lens system of small refractive power whose optical elements are known, and then measuring the back focal distance of the combined optical system to thereby determine the refractive power of the contact lens to be measured.

REFERENCES:
patent: 1241612 (1917-10-01), Emerson
patent: 3445169 (1969-05-01), Lueck
patent: 3820899 (1974-06-01), McCormack
patent: 3985445 (1976-10-01), Tagnon
patent: 4072428 (1978-02-01), Moss

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