Lens barrel having biasing force adjusting member

Details Lens barrel having biasing force adjusting member Lens barrel having biasing force adjusting member

1996-04-30

1998-02-17

Nelms, David C.

Optical: systems and elements

Lens

With variable magnification

359699, 359823, G02B 1514, G02B 702

Patent

active

057197091

ABSTRACT:
A lens barrel has a movable lens unit movable in an optical-axis direction, a lens moving member for moving the movable lens unit and a frictional force applying member for applying a frictional force on the lens moving member so that a quantity of force for operating the lens moving member remains the same irrespective of a magnitude of the moving force for moving the movable lens unit.

REFERENCES:
patent: 5285322 (1994-02-01), Horning et al.
patent: 5587754 (1996-12-01), Katayama et al.

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