Zoom lens system

Details Zoom lens system Zoom lens system

1991-03-19

1992-04-28

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

051092999

ABSTRACT:
A zoom lens system comprising a front lens unit which is composed of a positive meniscus lens component having a convex surface on the object side, a negative lens component and at least one positive lens component, and has a positive refractive power as a whole, and a rear lens unit which is composed of a positive lens component, a biconcave lens component and a negative meniscus lens component having a convex surface on the image side, and has a negative refractive power as a whole; and adapted so as to perform variation of focal length by varying the airspace reserved between said front lens unit and said rear lens unit.

REFERENCES:
patent: 4838669 (1989-06-01), Ogata et al.

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