PROBLEM TO BE SOLVED: To provide an endoscope apparatus for detecting optical transmission loss between a light guide member disposed with a wavelength conversion member and a light guide member disposed with a light diffusion member, using a single temperature sensor.SOLUTION: The endoscope apparatus includes: a first light source 69 a first light guide member 57 a wavelength conversion member 65 a second light source 71 a second light guide member 61 a light diffusion member 67 and a storage unit 135 for storing a first temperature change rate caused by the heat of the wavelength conversion member 65 corresponding to a drive signal of the first light source 69, and a second temperature change rate caused by the heat of the light diffusion member 67 corresponding to a drive signal of the second light source 71. An endoscope control unit 127 compares a third temperature change rate of a temperature measurement value detected by a temperature sensor 129, with the first and second temperature change rates, and detects the optical transmission loss generated in the first light guide member 57 or the second light guide member 61.COPYRIGHT: (C)2013,JPO&INPIT【課題】波長変換部材を配置した導光部材と、光拡散部材を配置した導光部材との光伝送損失を、一つの温度センサを用いて検知できる内視鏡装置を得る。【解決手段】内視鏡装置は、第1の光源69、第1の導光部材57、波長変換部材65と、第2の光源71、第2の導光部材61、光拡散部材67と、第1の光源69の駆動信号に対応した波長変換部材65の発熱による第1の温度変化率、及び第2の光源71の駆動信号に対応した光拡散部材67の発熱による第2の温度変化率を記憶する記憶手段135とを備える。内視鏡制御部127は、温度センサ129により検出した温度測定値の第3の温度変化率を、第1の温度変化率、及び第2の温度変化率と比較することで、第1の導光部材57、第2の導光部材61に発生した光伝送損失を検出する。【選択図】図1
