Highly variable magnification zoom lens system having a diaphrag

Details Highly variable magnification zoom lens system having a diaphrag Highly variable magnification zoom lens system having a diaphrag

1974-03-20

1976-07-20

Sacher, Paul A.

350207, 350186, 350187, G02B 1514

Patent

active

039703665

ABSTRACT:
A highly variable magnification zoom lens system in which a first zoom lens is connected from an object side and then a second zoom lens is connected from behind said first zoom lens. A first diaphragm for determining the relative aperture of the total zoom lens system is provided between said first zoom lens and the second zoom lens. A second diaphragm with its aperture diameter being varied in an association with the zooming of the second zoom lens is provided in a fixed imaging lens at an imaging plane side within the second zoom lens. This second diaphragm shields an upper light beam out of off-axis rays to prevent generation of halo.

REFERENCES:
patent: 3081671 (1963-03-01), Cook
patent: 3603726 (1971-09-01), Garber et al.

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