PROBLEM TO BE SOLVED: To provide a light source device for an endoscope including a main light source lamp and auxiliary light source lamps, which is excellent in illumination efficiency and where the loss of illumination light to be made incident to a light guide fiber bundle from both of the main light source lamp and the auxiliary light source lamps is extremely reduced.SOLUTION: The light source device for an endoscope includes auxiliary light source lamps 26 which are attached to a bracket 27 arranged at a position between the main light source lamp 23 and a convergence optical system 24 not to block an effective light beam bundle L1 so as to radiate an auxiliary light beam bundle L2 in a direction being nearly the same as that of a parallel light beam bundle radiated from the main light source lamp 23 along the outer edge of the effective light beam bundle L1 to be made incident to the light guide fiber bundle 13 from the main light source lamp 23. The auxiliary light beam bundle L2 emitted from the auxiliary light source lamps 26 is converged by the convergence optical system 24 and made incident to the incident end surface 13a of the light guide fiber bundle 13.COPYRIGHT: (C)2013,JPO&INPIT【課題】主光源ランプと補助光源ランプとを備えた内視鏡用光源装置において、主光源ランプと補助光源ランプの双方からライトガイドファイババンドルに入射する照明光のロスが共に極めて少なくて、照明効率の優れた内視鏡用光源装置を提供すること。【解決手段】主光源ランプ23からライトガイドファイババンドル13に入射する有効光線束L1の外縁に沿って、主光源ランプ23から放射された平行光線束と略同方向に補助光線束L2を放射するよう、主光源ランプ23と収束光学系24との間の位置に有効光線束L1を遮らないように配置されたブラケット27に取り付けられた補助光源ランプ26を備え、補助光源ランプ26から射出された補助光線束L2が収束光学系24により収束されてライトガイドファイババンドル13の入射端面13aに入射する。【選択図】 図1
