Lens barrel

Details Lens barrel Lens barrel

1997-12-10

1999-08-17

Perkey, W. B.

Photography

Having variable focal length of camera objective

Power zoom

396131, 396508, G03B 310

Patent

active

059406330

ABSTRACT:
A lens barrel includes an optical lens having an optical axis, an operation ring substantially cylindrical and operable about the optical axis to move the optical lens along the optical axis thereof, and a slidable contact member slidably in contact with the inner circumferential surface of the operation ring, the slidable contact member providing a specific load against the inner circumferential surface thereof. The operational torque of the operation force is changed when the slidable contact member moves in the optical axis direction by changing its contact area with the inner circumferential surface of the operation ring.

REFERENCES:
patent: 4763987 (1988-08-01), Ando
patent: 5305036 (1994-04-01), Tanaka
patent: 5528430 (1996-06-01), Hamasaki
patent: 5561564 (1996-10-01), Nakamura et al.
patent: 5654833 (1997-08-01), Fujike et al.
patent: 5657173 (1997-08-01), Imanari et al.
European Search Report dated Apr. 17, 1998.

Affiliated with

Also associated with

Rating

Lens barrel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lens barrel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens barrel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-324556