Zoom lens barrel

Details Zoom lens barrel Zoom lens barrel

1990-03-12

1993-09-14

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359704, 359819, 359830, G02B 1514, G02B 702

Patent

active

052454762

ABSTRACT:
A zoom lens barrel has first and second groups of lenses supported by respective lens frames and a cam mechanism which controls the axial position of at least one of the lens groups. The cam mechanism comprises a guide pin which is provided on the lens frame of the associated lens group to be controlled by the cam mechanism, a cam ring which is provided on its one end face with a cam surface with which the guide pin comes into contact, and a cam ring rotating mechanism which rotates the cam ring.

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patent: 4974949 (1990-12-01), Tanaka
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