Adjustable diopter type finder optical system

Details Adjustable diopter type finder optical system Adjustable diopter type finder optical system

1982-06-01

1984-03-20

Gonzales, John

350410, G03B 1912

Patent

active

044377509

ABSTRACT:
An adjustable diopter type finder optical system comprising an eyepiece comprising a first lens component having negative refractive power and a second lens component having positive refractive power, the finder optical system being arranged to make diopter adjustment by moving both of the first and second lens components in the same direction along the optical axis by varying the distance between those lens components and arranged so that variation of magnification and fluctuation of aberrations are small.

REFERENCES:
patent: 4206988 (1980-06-01), Miyamoto et al.
patent: 4217048 (1980-08-01), Egawa

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