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Parent-and-son type endoscope system for making a synchronized field sequential system illumination

  • US 5,178,130 A
  • Filed: 01/29/1991
  • Issued: 01/12/1993
  • Est. Priority Date: 04/04/1990
  • Status: Expired due to Term
First Claim
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1. An endoscope system comprising:

  • a first electronic endoscope comprising an elongate insertable section, a first light guide inserted through said insertable section, transmitting an illuminating light fed on one end surface and emitting the illuminating light from the other end surface, a first objective optical system provided on the tip side of said insertable section and a first solid state imaging device photoelectrically converting an optical image based on said first objective optical system;

    a second electronic endoscope comprising an elongate insertable section, a second light guide inserted through said insertable section, transmitting an illuminating light fed on one end surface and emitting the illuminating light from the other end surface, a second objective optical system provided on the tip side of said insertable section and a second solid state imaging device photoelectrically converting an optical image based on said second objective optical system;

    first and second light source apparatus respectively sequentially feeding as a first and second field sequential illuminating lights a plurality of illuminating lights different in the wavelength range to the end surfaces on one side of said first and second light guides;

    first and second driving circuits outputting respectively first and second image signals photoelectrically converted by applying respectively first and second driving signals to said first and second solid state imaging devices;

    first and second video signal processing circuits processing respectively said first and second image signals to produce respectively standard first and second video signals;

    first and second monitors displaying respectively said first and second video signals; and

    a synchronization controlling means synchronizing the illuminating periods of the respective wavelength ranges of said first and second field sequential illuminating lights by said first and second light source apparatus.

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