Lens barrel

Details Lens barrel Lens barrel

1996-07-30

1998-03-03

Nelms, David C.

Optical: systems and elements

Lens

With support

359699, 359704, G02B 702

Patent

active

057241961

ABSTRACT:
A lens barrel is arranged to include a first cam ring having a helicoid part helicoid-connected to the frontmost group of an optical system and a cam part arranged to restrict a front of at least a part of a rear group of the optical system located in rear of the frontmost group and a second cam ring connected to the first cam ring and having a cam part arranged to restrict a rear of the rear group, or a spur-gear helicoid having a spur gear part and a helicoid part arranged to spatially overlap each other, a spur gear which engages the spur gear part of the spur-gear helicoid, a helicoid part which engages the helicoid part of the spur-gear helicoid and a lens barrel system to which a rotation force is transmitted by the engagement between the spur gear part and the spur gear and to which a moving force in the direction of an optical axis is transmitted by the engagement between the helicoid part and the helicoid, or to include a first group of an optical system, a second group of the optical system disposed adjacent to the first group, a diaphragm, a first elastic member disposed between the first group of the optical system and the diaphragm and a second elastic member disposed between the second group of the optical system and the diaphragm.

REFERENCES:
patent: 4439018 (1984-03-01), Okajima et al.
patent: 4478103 (1984-10-01), Benjamin

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-2254245