Patent ID: 6124883
Filing Date: 2000-09-26
Classification: A61B

Abstract:
A TV observation system for endoscopes having an illumination system, at least, comprising:a light source optical system having a light emitting section for emitting light and a condensing optical system for concentrating the light from the light emitting section on a light-receiving surface; anda light transmitting section for receiving the light from said light source optical system to transmit the light to a distal end of an endoscope,the condensing optical system of said light source optical system being defined by a magnification of 1.times.,wherein said light source optical system is defined by1.0.ltoreq.D.sub.1 /L.ltoreq.1.50.575.ltoreq..vertline.f/D.sub.2 .vertline..ltoreq.1.0where D.sub.1 is an outer diameter of the light-receiving surface, L is a dimension of the light emitting section, f is a focal length of a front lens unit constituting the condensing optical system, and D.sub.2 is an outer diameter of each of lenses constituting the condensing optical system.