Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2011039390
Kind Code:
A
Abstract:

To make shutter speed higher inexpensively, and to drive a shutter blade in a form capable of easily correcting the lowering of an ambient light quantity on a picked-up image.

An upper shutter blade 3 and a lower shutter blade 5 are devised in terms of blade shape so that their portions 3o and 5o that cover the vicinity of the center of an aperture W start to shield the aperture W from light preceding to their portions 3c and 5c that cover the vicinities of four corners when shielding the aperture W from light, whereby their portions facing the aperture W travel reversely to each other in a direction perpendicular to long sides Wa of the aperture W opposed to each other in such a state that they are parallel with the long sides Wa of the aperture W. Besides, positions of blade supporting shafts 2ax1 and 2ax2 pivotally supporting the upper shutter blade 3 and the lower shutter blade 5 to be rotatable are devised.


Inventors:
ISHIMASA TORU
NISHIGORI HIDETOSHI
Application Number:
JP2009188429A
Publication Date:
February 24, 2011
Filing Date:
August 17, 2009
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CANON KK
International Classes:
G03B9/10; G03B9/14; H04N5/225
Domestic Patent References:
JP2006276763A2006-10-12
JPH09189935A1997-07-22
JP2006178366A2006-07-06
Attorney, Agent or Firm:
Another role Shigehisa