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Title:
ENDOSCOPE SYSTEM
Document Type and Number:
Japanese Patent JP3894761
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To advantageously maintain the brightness and sharpness of an image by improving a reddish tint of a subject image of observation and observing the tissues of mucous membranes, blood vessels and the like in full contrast.
SOLUTION: An apparatus is provided with a red component-cutting filter 54 for use in cutting the long wavelength side of the red components of the illuminating light in order to improve a reddish tint of a subject image of observation to observe mucous membranes, blood vessels and other tissues in full contrast. Controlling of the opening level of an aperture 46 is performed, and a gain control to amplify the image signal can be performed by using a Correlated Double Sampling (CDS)/Automatic Gain Control (AGC) circuits 32 when the amount of light is too small even when the opening of the aperture 46 reaches the maximum. Thereby, the degradation in light caused by the insertion of the red component-cutting filter 54 can be solved favorably.


Inventors:
Higuchi, Mitsuru
Ayame, Daisuke
Abe, Kazunori
Takeuchi, Shinji
Application Number:
JP2001000295270
Publication Date:
March 22, 2007
Filing Date:
September 27, 2001
Export Citation:
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Assignee:
FUJI PHOTO OPTICAL CO LTD
International Classes:
A61B1/04; G02B23/24; H04N5/235; H04N7/18; (IPC1-7): A61B1/04; G02B23/24; H04N5/235; H04N7/18
Domestic Patent References:
JP1297041A
JP2001170009A
JP5297285A
Attorney, Agent or Firm:
緒方 保人



 
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