Electronic endoscope apparatus provided with AC lighting light source

Abstract

In an apparatus using an AC lighting lamp including a reflector and a condensing lens as a condensing unit and using a CCD to pick up an image of a subject irradiated with a light from the lamp, an entrance facet of a light guide is arranged between two condensing points G1 and G2 and at a position that is not close to either of the condensing points, particularly at an intermediate position therebetween so that lights from a bright spot g1 or g2 at a tip of a first or second electrode, respectively, of the lamp are condensed at the corresponding condensing point by the condensing unit. Thereby, although an amount of emission slightly decreases compared to the case where the entrance facet is arranged on the basis of the bright spot, emission with a reduced variation in luminance is obtained to enable photographing with a substantially uniform amount of exposure, while preventing possible flickers.

Dependencies are inferred from the claim text.