Title:
画像形成装置
Document Type and Number:
Japanese Patent JP5796971
Kind Code:
B2
Abstract:
An image forming apparatus includes a detection unit configured to irradiate a patch image formed on a recording material with light, and detect light intensities at a plurality of wavelengths in the light reflected from the patch image; and a determination unit configured to determine that a patch image for which the detection unit is detecting light intensities has transitioned from a first patch image to a second patch image, wherein the determination unit is further configured to determine that the patch image for which the detection unit is detecting has transitioned, in a case where a light intensity at a wavelength for identification of a patch image to be identified, has varied by an amount greater than a first threshold corresponding to that wavelength for identification.
Inventors:
Hiroki Shiomichi
Shouji Ryuhei
Ken Yokoyama
Shouji Ryuhei
Ken Yokoyama
Application Number:
JP2011042654A
Publication Date:
October 21, 2015
Filing Date:
February 28, 2011
Export Citation:
Assignee:
Canon Inc
International Classes:
G03G15/01; B41J2/525; B41J29/46
Domestic Patent References:
| JP2010091600A | ||||
| JP2000039747A | ||||
| JP2005001129A | ||||
| JP2010026210A | ||||
| JP2009163223A | ||||
| JP2003076077A |
Foreign References:
| US20090154944 | ||||
| US20030044190 |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu