Lens barrel

Details Lens barrel Lens barrel

1990-07-23

1992-05-19

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359694, 354400, G02B 1500

Patent

active

051153483

ABSTRACT:
A magnifying power varying device comprises an operation member which is arranged to permit selection between a power varying operation in a telephoto direction and a power varying operation in a wide-angle direction, a transmission mechanism for driving the power varying mechanism, a driving mechanism which generates a driving force, and a change-over mechanism which is arranged to connect the driving mechanism to the transmission mechanism when the power varying operation is performed in the telephoto direction or in the wide-angle direction by means of the operation member and to forcibly disconnect the driving mechanism from the transmission mechanism when the operation of the operation member is canceled.

REFERENCES:
patent: 4806000 (1989-02-01), Shiokama et al.
patent: 5016993 (1991-05-01), Akitake

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