Zoom mechanism for zoom lenses

Details Zoom mechanism for zoom lenses Zoom mechanism for zoom lenses

1988-09-30

1991-05-21

Dzierzynski, Paul M.

35419513, G02B 1500

Patent

active

050169939

ABSTRACT:
A zoom mechanism for zoom lenses drives a focusing lens group in a linear manner and lens groups other than the focusing lens group in either a non-linear or a linear manner, during a zooming operation and, after the zooming operation, drives the focusing lens group for the focusing operation to correct a difference caused in the zooming operation.

REFERENCES:
patent: 3185029 (1965-05-01), Peck et al.
patent: 4008951 (1977-02-01), Himmelsbach
patent: 4043642 (1977-08-01), Hirose et al.
patent: 4161756 (1979-07-01), Thomas
patent: 4256371 (1981-03-01), Someya
patent: 4275952 (1981-06-01), Uesugi
patent: 4621906 (1986-11-01), Hashimoto et al.
patent: 4676600 (1987-06-01), Takizawa

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