Electronic endoscope apparatus capable of observing laser-illumi

Details Electronic endoscope apparatus capable of observing laser-illumi Electronic endoscope apparatus capable of observing laser-illumi

1990-06-19

1991-03-12

Grieb, William H.

Surgery

Truss

Perineal

358 98, 606 18, A61B 104

Patent

active

049989715

ABSTRACT:
To prevent a halation phenomenon from an endoscopic image of a laser-illuminated body cavity of a biological body under medical examination, an electronic endoscope apparatus comprises an electronic scope unit and a main endoscope unit coupled to the electronic scope unit. The electronic scope unit includes: a laser mirror upon which laser light reflected from the laser-illuminated body cavity of the biological body under medical examination is incident, for refracting a first light component having a laser light wavelength of the incident laser light and also for passing therethrough a second light component having a visible light wavelength other than the laser light wavelength; a first image sensor for receiving the first light component refracted from the laser mirror; a second image sensor for directly receiving the second light component passing through the laser mirror to produce a visible light image signal; and, an ND (neutral density) filter positioned on a light-receiving surface of the first image sensor, for lowering brightness of the first light component having the laser light wavelength, thereby producing a laser light image signal from the first image sensor. The main endoscope unit processes both the laser light image signal and visible light image signal to display an endoscopic image of the laser-illuminated body cavity and of a body portion around the laser-illuminated body cavity without any halation phenomenon.

REFERENCES:
patent: 4211229 (1980-07-01), Wurster
patent: 4580559 (1986-04-01), L'Esperance
patent: 4597380 (1986-07-01), Raif et al.
patent: 4845555 (1989-07-01), Yabe et al.
patent: 4901718 (1990-02-01), Bille et al.

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