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Patent Searching and Data


Title:
LIGHT CONTROLLER FOR ELECTRONIC ENDOSCOPE
Document Type and Number:
Japanese Patent JPH09262206
Kind Code:
A
Abstract:

To enable to adjust and set most suitable lighting in proportion to various brightness distribution in the scope filed by obtaining the required luminosity there through operation after having classified shooting field into several areas and putting specific importance on respective brightnesses there.

An image process circuit 22 synchronized with the conversion of lighting wavelength by a filter 33a, is to take in images of respective wavelengths from shooting elements 14, combining them up, display an objective colored shooting image on a monitor display 40 as an imated image. A photometry operation circuit 23 is to do the operation to obtain required luminosity of the image by means of divided photometry after having classified the image output from the image process circuit 22 into several areas and putting specific importance on respective brightnesses there. A lighting control circuit 24 would drive a rotary solenoid diaphragm 33b in proportion to the output from the photometry operation circuit 23 so as to set the angle of the diaphragm plate 33a to gain required lighting. The photometry operation circuit 23 is otherwise able to obtain the luminosity of the image through operation using the brightnesses of several areas specified by the user.


Inventors:
SEKIYA TAKAOMI
Application Number:
JP9944996A
Publication Date:
October 07, 1997
Filing Date:
March 28, 1996
Export Citation:
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Assignee:
ASAHI OPTICAL CO LTD
International Classes:
G02B23/26; A61B1/04; A61B1/06; H04N7/18; (IPC1-7): A61B1/04; A61B1/04; A61B1/06; G02B23/26; H04N7/18
Attorney, Agent or Firm:
Shuhei Matsuoka