Zoom lens barrel

Details Zoom lens barrel Zoom lens barrel

1994-11-04

1995-11-21

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359704, 359706, G02B 1514

Patent

active

054693004

ABSTRACT:
A zoom lens barrel has at least front and rear lens groups and a linear movement guide device which guides the linear movement of the front and rear lens groups in an optical axis direction. The barrel includes a rotatable cam ring which has a first helicoid and at least one cam groove, a front lens barrel which supports the front lens group and which has a second helicoid which is engaged by the first helicoid of the cam ring. A rear lens frame which supports the rear lens group and which has at least one cam pin which can be fitted in the associated cam groove of the cam ring is provided.

REFERENCES:
patent: 4199227 (1980-04-01), Uesugi et al.
patent: 4275952 (1981-06-01), Usesugi
patent: 4315670 (1982-02-01), Shigoky
patent: 4322150 (1982-03-01), Kamata et al.
patent: 4445756 (1984-05-01), Komoto
patent: 4534625 (1985-08-01), Ohnuki
patent: 4560237 (1985-12-01), Ohkura et al.
patent: 4564264 (1986-01-01), Komoto
patent: 4582350 (1986-04-01), Okajima
patent: 4759618 (1988-07-01), Kamata
patent: 4779964 (1988-10-01), Ozawa et al.
patent: 4910544 (1990-03-01), Nomura
patent: 4948227 (1990-08-01), Takeyasu
patent: 4993815 (1991-02-01), Yamazaki et al.
patent: 5017850 (1991-05-01), Harada et al.
patent: 5034762 (1991-07-01), Kohmoto
patent: 5035493 (1991-07-01), Tanaka
patent: 5043752 (1991-08-01), Kohmoto
patent: 5079577 (1992-01-01), Nomura
patent: 5144493 (1992-09-01), Nomura
patent: 5225938 (1993-07-01), Nomura
Feingeratetechink 38 (1989) 7, pp. 311-314.
English translation of German Office Action.

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-1142040