The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2011
Filed:
Apr. 14, 2009
Tatsuo Makii, Tokyo, JP;
Naoyuki Ohno, Tokyo, JP;
Tatsuo Makii, Tokyo, JP;
Naoyuki Ohno, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
Disclosed herein is a light quantity adjusting device including: first and second diaphragm blades shiftably provided to adjust a size of a diaphragm aperture; a neutral density filter blade provided shiftably in the same direction as the first and second diaphragm blades and having a neutral density filter adapted to cover the diaphragm aperture to reduce a quantity of light passing through the diaphragm aperture; and a drive mechanism adapted to shift the first and second blades and the neutral density filter blade; wherein the drive mechanism is configured to include an actuator, a first cam groove, a second cam groove, a third cam groove, an arm, a first cam-pin, and a second cam-pin.