Light amount-adjusting device and light amount-adjusting...

Details Light amount-adjusting device and light amount-adjusting... Light amount-adjusting device and light amount-adjusting...

2007-08-21

2007-08-21

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

C396S452000, C396S449000

Reexamination Certificate

active

11358142

ABSTRACT:
A light amount-adjusting device has a base plate with an optical path aperture, first and second blade members, and a driving unit for swinging open and close the blade members. Each blade member has a base-end portion and a front-end portion. The base-end portion is pivotally held on the base plate. The front-end portion faces the aperture. First and second boss-like protrusions project from the base plate and from the surfaces of the blade members. The protrusions are coupled to define the heightwise positions of the blade members in the direction of the optical axis. The vertically overlapping blade members pivotally supported on the base plate can be swung open and closed without interfering with each other. The device produces less frictional load when the aperture is opened and closed, and thus less noise.

REFERENCES:
patent: 5997187 (1999-12-01), Hamasaki
patent: 6811331 (2004-11-01), Iwasa
patent: 6853810 (2005-02-01), Fujinaga
patent: 2003-57715 (2003-02-01), None

Affiliated with

Also associated with

Rating

Light amount-adjusting device and light amount-adjusting... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light amount-adjusting device and light amount-adjusting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light amount-adjusting device and light amount-adjusting... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3842072