Patent ID: 6533722
Filing Date: 2003-03-18
Classification: A61B

Abstract:
An electronic endoscope having a tip portion with a tip end which is to be inserted into an object to be observed, the electronic endoscope comprising:an imaging element provided in the tip portion; an imaging optical system having an optical axis, the imaging optical system being provided in the tip portion at a position closer to the tip end than the imaging element; and a light-emitting element for emitting light toward an observation part of the object, the light-emitting element being provided in the tip portion at a position closer to the tip end than the imaging element, wherein the light-emitting element is arranged such that at least a part of the light-emitting element overlaps with the imaging element when viewed from the optical axis direction of the imaging optical system, wherein the imaging element has an imaging region that includes at least one shading region for detecting a reference level of optical black, in which the light-emitting element is arranged so that at least a part of the light-emitting element overlaps with the shading region of the imaging element when viewed from the optical axis direction of the imaging optical system.