PROBLEM TO BE SOLVED: To provide an endoscope apparatus which does not need to install an impedance matching circuit individually according to the type of an insertion part.SOLUTION: The endoscope apparatus 1 includes: an imaging element 12 which is installed at the tip of the insertion part 2, and takes an optical image of a subject an encoder 23 which applies prescribed image processing to an imaging signal photoelectrically converted in the imaging element 12 a frequency detection section 25 which detects the transmission frequency of the imaging signal and an impedance conversion section 28 which ensures the impedance matching according to the transmission frequency detected in the frequency detection section 25.COPYRIGHT: (C)2012,JPO&INPIT【課題】挿入部の種類に応じてインピーダンス整合回路を個別に設ける必要のない内視鏡装置を提供する。【解決手段】内視鏡装置1は、挿入部2の先端に設けられ、被写体の光学像を撮像する撮像素子12と、撮像素子12において光電変換された撮像信号に対して所定の画像処理を施すエンコーダ23と、撮像信号の伝送周波数を検出する周波数検出部25と、周波数検出部25において検出された伝送周波数に応じて、インピーダンス整合を取るインピーダンス変換部28を有する。【選択図】図1
