Zoom lens system

Details Zoom lens system Zoom lens system

1989-03-21

1990-09-04

Arnold, Bruce Y.

350413, G02B 1514, G02B 958

Patent

active

049539574

ABSTRACT:
A zoom lens system comprising a very small number of lens components, having favorably corrected aberrations, comprising two lens groups having positive refractive power and negative refractive power respectively, and so adapted as to perform variation of focal length by varying the airspace reserved between the two lens groups, said lens group having positive refractive power comprising at least one graded refractive index lens component having the shape of a negative meniscus lens and a refractive power distribution wherein refractive indices are lowered as the lens portions are farther from the optical axis in the direction perpendicular to the optical axis.

REFERENCES:
patent: 4830476 (1989-05-01), Aoki

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