Compact zoom lens

Details Compact zoom lens Compact zoom lens

1985-07-31

1987-10-13

Corbin, John K.

G02B 964, G02B 1514

Patent

active

046994742

ABSTRACT:
A zoom lens for a color video camera in which zoom ratio is 6 and F number is approximately 1.4. The zoom lens comprises a positive first group for focusing, a negative second unit for zooming, a negative third unit which is a compensator, a positive fourth unit for forming an incident divergent bundle of rays into a parallel or converging bundle of rays, and a fifth unit in the form of a relay lens composed of a front component and a rear component. Parameters, especially such as a refracting power of the first unit and second unit, are suitably selected whereby a zoom lens which is compact and which aberrations are well compensated is obtained.

REFERENCES:
patent: 3336094 (1967-08-01), Macher

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