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Patent Searching and Data


Title:
IMAGE READER
Document Type and Number:
Japanese Patent JPH02260762
Kind Code:
A
Abstract:
PURPOSE:To suppress the influence of dust or the like upon a reproduced image by forming a solid state image pickup element and a filter integrally in a case body having dust preventing structure and separating the arrangement position of the filter apart from the focus position of an image pickup lens. CONSTITUTION:Respective near infrared ray cutting filters 6 are arranged on positions where the influence of the adhesion of dust does not appear on a reproduced image between respective CCD line sensors 3022, 2023, 3024 and a prism 3021 and these filters 6 and the CCD line sensors 3022, 3023, 3024 form respective units with box-line structure by respective case bodies 9. Thus, the solid state image pickup element such as the CCD line sensor and the filter such as a spectral distribution correcting filter are integrated in the form of a box or a cylinder in the case body with dust preventing structure and the arrangement position of the filter is separated from the focus position of the image pickup lens. Consequently, the influence of dust or the like upon a reproduced image can be removed.

Inventors:
UTAGAWA TSUTOMU
SATO YUICHI
OMURA HIROSHI
SHIMIZU HIDEAKI
Application Number:
JP8000789A
Publication Date:
October 23, 1990
Filing Date:
March 30, 1989
Export Citation:
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Assignee:
CANON KK
International Classes:
H04N1/04; G06T1/00; H04N1/10; H04N1/107; H04N1/19; (IPC1-7): G06F15/64; H04N1/04; H04N1/10
Attorney, Agent or Firm:
Yoshikazu Tani



 
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