Wide-field eyepiece

Details Wide-field eyepiece Wide-field eyepiece

1983-04-08

1985-02-05

Corbin, John K.

350469, G02B 934, G02B 2500

Patent

active

044975465

ABSTRACT:
A wide-field eyepiece comprising a first, second and third lens components, the first lens component being a positive cemented doublet consisting of a negative lens and a positive lens, the second lens component being a negative cemented doublet consisting of a negative lens and a positive lens, the third lens component comprising at least two lens elements and having positive refractive power as a whole, the wide-field eyepiece having a long eyepoint distance and favorably corrected aberrations.

REFERENCES:
patent: 3623791 (1971-11-01), Uetake

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