Lens selection device

Details Lens selection device Lens selection device

1978-01-26

1980-03-18

Sacher, Paul A.

Photocopying

Contact printing

Light boxes

355 60, G02B 1504, G03B 2740

Patent

active

RE0302317

ABSTRACT:
A lens selection device for placing any one of three or more magnification lenses in an operative position where its optical axis aligns with a respective reference axis, a selected lens being shifted along a fixed path from a retracted position to the operative position thereof by separate drive means numbering one less than the quantity of the lenses. In the case of three lenses, for instance, a first drive means is used to shift a first lens, a second drive means is used to shift a second lens, and a follower means coupled with a third lens is used to shift it to its operative position when the first (or the second) lens is driven to its retracted position.

REFERENCES:
patent: 2985070 (1961-05-01), Lane
patent: 3600066 (1971-08-01), Del Vecchio

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