Invention Grant
- Patent Title: Structure for preventing extraneous light from entering image reading apparatus
- Patent Title (中): 用于防止外来光进入图像读取装置的结构
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Application No.: US10278338Application Date: 2002-10-23
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Publication No.: US06892945B2Publication Date: 2005-05-17
- Inventor: Kazuo Shishido
- Applicant: Kazuo Shishido
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Morgan & Finnegan, L.L.P.
- Priority: JP2001-329267 20011026
- Main IPC: G06T1/00
- IPC: G06T1/00 ; G03G15/00 ; H04N1/04 ; H04N1/10 ; H04N1/12 ; H04N1/193 ; G06K7/00
Abstract:
An image reading apparatus for reading a document has an image sensor unit, which is moved along a platen glass in a sub-scanning direction, mounting an LED, a light guide and a sensor. A white reference panel for use of shading correction is provided on the platen glass on the side thereof opposite the image sensor unit. Light shield plates are provided on the platen glass on the side facing the image sensor unit along both sides of the white reference panel.
Public/Granted literature
- US20030081275A1 Structure for preventing extraneous light from entering image reading apparatus Public/Granted day:2003-05-01
Information query
