Ocular of large visual field

Details Ocular of large visual field Ocular of large visual field

1979-05-21

1981-05-19

Corbin, John K.

350472, G02B 300, G02B 934

Patent

active

042681286

ABSTRACT:
The present invention relates to an ocular comprising a first lens component of a positive single or cemented lens, a second lens component of a positive single lens, a third lens component of a biconcave lens and a fourth lens component of a positive single lens. The ocular is constituted of a triplet type lens system comprising as a basis the second through fourth lens components and, in addition, the positive single or cemented lens.

REFERENCES:
patent: 3862796 (1975-01-01), DeJager
patent: 4145108 (1979-03-01), Itaya

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