Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2006-12-29
2008-05-13
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C353S101000, C396S079000
Reexamination Certificate
active
07372637
ABSTRACT:
A focusing mechanism allowing a user to adjust the focus from infinity to a close distance rapidly and precisely, and an optical device utilizing such a focusing mechanism. The focusing unit includes an optical member movable along an optical axis of an optical system, a screw body put into rotation via the rotation of an operation member, a nut body meshing with the screw body and including a cam follower, a cam follower restricting means including a rotation restricting portion for restricting the cam follower from rotating or revolving about a rotation or revolution axis of the operation member, and a rotation restriction releasing portion for releasing the restriction which prevents the rotation or revolution of the cam follower about the rotation or revolution axis of the operation member, and an optical member moving means for moving the optical member along the optical axis via the movement of the nut body along its rotation axis.
REFERENCES:
patent: 3540792 (1970-11-01), Akin, Jr.
patent: 4053211 (1977-10-01), Momiyama
patent: 4436387 (1984-03-01), Shimizu
patent: 4545656 (1985-10-01), Takano
patent: 4630901 (1986-12-01), Altenheiner et al.
patent: 5103248 (1992-04-01), Sato
patent: 5999312 (1999-12-01), Funatsu
patent: 6429969 (2002-08-01), Koide et al.
patent: 6580555 (2003-06-01), Crista
EPO Search Report Dated Apr. 7, 2007, for Corresponding EP0 Application No. EP6127023.7.
Kamakura Koki Co., Ltd.
Pinkney DaWayne A
Sugarman Scott J.
The Maxham Firm
LandOfFree
Focusing unit and optical device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Focusing unit and optical device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focusing unit and optical device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3982393