Compact wide-angle objective lens

Details Compact wide-angle objective lens Compact wide-angle objective lens

1993-12-27

1996-06-18

Epps, George Y.

Optical: systems and elements

Lens

With variable magnification

359691, 359740, 359770, G02B 1514, G02B 900

Patent

active

055284280

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

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