Compact wide angle zoom lens

Details Compact wide angle zoom lens Compact wide angle zoom lens

1993-03-01

1995-01-10

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359682, G02B 1514

Patent

active

053812689

ABSTRACT:
A wide angle zoom lens comprises a first lens group having a negative overall refracting power and a second lens group having a positive overall refracting power disposed in the named order from the object side, in which a magnification change is carried out by changing an air gap between the two lens groups. The first lens group comprises a negative meniscus lens convex on the object side and a positive lens convex on the object side disposed in the named order from the object side. The negative meniscus lens has at least one aspherical surface thereon. The second lens group comprises at least a positive lens, a positive lens, a negative lens having a concave surface with a large curvature on the image side, and a positive lens. The wide angle zoom lens is arranged to satisfy various conditions.

REFERENCES:
patent: 4400064 (1983-08-01), Ikemori et al.
patent: 4560253 (1985-12-01), Ogino

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