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Image obtaining method and apparatus of an endoscope apparatus

  • US 6,796,938 B2
  • Filed: 04/26/2002
  • Issued: 09/28/2004
  • Est. Priority Date: 04/27/2001
  • Status: Expired due to Fees
First Claim
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1. An image obtaining method for use in an endoscope apparatus, comprising the steps of:

  • irradiating a living tissue with an illuminating light and an excitation light, each of which is emitted at a mutually different timing, receiving, by use of a single photoelectric converting element, a fluorescent image formed of the fluorescent light emitted from the living tissue upon the irradiation thereof by the excitation light and a standard image formed of the reflected light reflected from the living tissue upon the irradiation thereof by the illuminating light, photoelectrically converting said received standard image and said received fluorescent image to obtain each as respective analog signals, converting, by use of an A/D converting means, said analog signals to respective digital values, and outputting said digital values as respective image signals, wherein said A/D converting means converts said analog signal representing the fluorescent image to digital values with a narrower input range than that with which the analog signal representing the standard image is converted.

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