Optometer eyepiece

Details Optometer eyepiece Optometer eyepiece

1976-07-16

1978-01-03

Sacher, Paul A.

350220, G02B 300, G02B 934

Patent

active

040663396

ABSTRACT:
A four-component eyepiece for an optometer has an eye relief of about 117mm and is substantially free of chromatic aberration.

REFERENCES:
patent: 2637245 (1953-05-01), Ludewig
patent: 3352620 (1967-11-01), Scidmore et al.

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