Zoom lens

Details Zoom lens Zoom lens

1996-04-24

1998-08-11

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359682, 359708, G02B 1514, G02B 302

Patent

active

057935360

ABSTRACT:
In a zoom lens having a negative lens unit and a positive lens unit, a first lens unit G1 has, in succession from the object side, a first negative meniscus lens component L11 having its concave surface facing the image side, a second negative lens component L12 and a third positive lens component L13 having a convex surface facing the object side, a second lens unit G2 has, in succession from the object side, a first positive lens component L21, a second positive lens component L22, a third negative lens component L23 and a fourth positive lens component L24 separated from one another, at least one of the lens surfaces of the first negative meniscus lens component L11 and second negative lens component L12 in the first lens unit G1 is formed into an aspherical shape, and predetermined conditional expressions are satisfied.

REFERENCES:
patent: 5076677 (1991-12-01), Sato
patent: 5329402 (1994-07-01), Sato
patent: 5331464 (1994-07-01), Ito et al.
patent: 5539581 (1996-07-01), Sato
patent: 5563739 (1996-10-01), Sato

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