Endoscopic television apparatus
First Claim
1. An endoscopic television apparatus comprising:
- a light supply unit for periodically emitting light beams of different luminances;
an endoscope including a light guide for leading the light beams from said light supply unit to an object and an image guide for transmitting images of the object subjected to the light beams of different luminances;
a camera unit for converting the images transmitted by the image guide of said endoscope into video signals of different brightnesses corresponding to the different luminances;
means for extracting signal components within a given level range from each of the video signals from said camera unit;
synthesizing means for synthesizing the signal components extracted by said signal component extracting means to form video data; and
means for displaying the composite video signal from said synthesizing means as an image of said object.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical filter member composed of a plurality of ND filters having different transmission factors and arranged circumferentially at regular intervals is disposed between a light source and a light guide of an endoscope. When the optical filter member is rotated, a light beam with periodically varying luminance is transmitted through the light guide to illuminate an object inside a body cavity. Images of the object corresponding to different luminances are converted severally into video signals by a television camera. A signal component within a given level range is extracted from each of these video signals by a limiter. The signal components of the video signals are composed into video data to be supplied to a display. The display indicates the video data as an image with proper contrast.
57 Citations
6 Claims
-
1. An endoscopic television apparatus comprising:
-
a light supply unit for periodically emitting light beams of different luminances; an endoscope including a light guide for leading the light beams from said light supply unit to an object and an image guide for transmitting images of the object subjected to the light beams of different luminances; a camera unit for converting the images transmitted by the image guide of said endoscope into video signals of different brightnesses corresponding to the different luminances; means for extracting signal components within a given level range from each of the video signals from said camera unit; synthesizing means for synthesizing the signal components extracted by said signal component extracting means to form video data; and means for displaying the composite video signal from said synthesizing means as an image of said object. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification