Zoom lens barrel

Details Zoom lens barrel Zoom lens barrel

1990-11-29

1992-02-25

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

35419512, 359823, G02B 1500

Patent

active

050918028

ABSTRACT:
A zoom lens barrel includes a first and a second lens units simultaneously shifting for zooming along an optical axis; a fixed lens barrel for housing the first and second lens units; a first cam groove formed in the fixed lens barrel so as to control the shift of the first lens unit; and a second cam groove formed in the fixed lens barrel so as to control the shift of the second lens unit. The zoom lens barrel further includes a rotary barrel rotating on the optical axis; a straight groove, extending in the optical axis, formed in the rotary barrel so as to control the shift of the first lens unit; a straight groove, extending in the optical axis, formed in the rotary barrel so as to control the shift of the second lens unit; a first retaining ring which retains the first lens unit, and which has a projection engaged with the first straight groove and the first cam groove; and a second retaining ring which retains the second lens unit, and which has a projection engaged with the second straight groove and the second cam groove.

REFERENCES:
patent: 4576446 (1986-03-01), Kamata

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1896630