(19)
(11) EP 2 323 364 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A2)

(48) Corrigendum issued on:
10.08.2011 Bulletin 2011/32

(88) Date of publication A3:
13.07.2011 Bulletin 2011/28

(43) Date of publication:
18.05.2011 Bulletin 2011/20

(21) Application number: 10190413.4

(22) Date of filing: 09.11.2010
(51) International Patent Classification (IPC): 
H04N 1/407(2006.01)
H04N 1/04(2006.01)
H04N 1/19(2006.01)
 H04N 1/00(2006.01)
H04N 1/40(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 11.11.2009 JP 2009257940

(71) Applicant: Ricoh Company, Ltd.
Tokyo 143-8555 (JP)

(72) Inventor:
  • Tsukahara, Hajime
    Tokyo 143-8555 (JP)

(74) Representative: Schwabe - Sandmair - Marx 
Patentanwälte Stuntzstraße 16
81677 München
81677 München (DE)

   


(54) Image scanning apparatus and image forming apparatus


(57) An image scanning apparatus includes an image scanning unit (25) that reads an image from an original sheet (1) by scanning an image-formed surface of the original sheet (1) with light in a main-scanning direction and converting light reflected from the image-formed surface into electricity using a photoelectric conversion element (201); a shading correction unit (205) that performs shading correction on an image signal created by reading the image from the original sheet (1); a white member (26) that faces a scanning surface of the image scanning unit (25); and a reference-white-data creating unit (25) that creates reference white data for the shading correction by scanning a surface of the white member (26) using the image scanning unit (25); and an interval controlling unit (100) that decreases an interval between a scanning surface of the image scanning unit (25) and a surface of the white member (26) when the reference-white-data creating unit (25) creates the referential white data.