Wide angle objective lens

Details Wide angle objective lens Wide angle objective lens

1992-12-01

1993-09-07

Arnold, Bruce Y.

Optical: systems and elements

Lens

With light limiting or controlling means

359747, 359757, 359772, G02B 934, G02B 962

Patent

active

052434680

ABSTRACT:
A wide angle objective lens has, in succession from the object side, a first lens component which is a positive meniscus lens having its convex surface facing the object side, a second lens component which is a cemented meniscus lens comprising a negative lens and a positive lens cemented together and having its concave surface facing the object side and having positive refractive power, a third lens component which is a cemented meniscus lens comprising a negative lens and a positive lens cemented together and having its concave surface facing the object side and having positive refractive power, and a fourth lens component which is a negative meniscus lens having its concave surface facing the object side, and has a stop between the second lens component and the third lens component, and satisfies various predetermined conditions.

REFERENCES:
patent: 4235521 (1980-11-01), Imai
patent: 4394073 (1983-07-01), Wakamiya

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