PROBLEM TO BE SOLVED: To provide an imaging element cooling structure to efficiently cool an imaging element without radially enlarging a tip end of an insertion portion.SOLUTION: An imaging element package 12 is mounted on an imaging element packaging circuit board 13. A cable attachment part 21 is provided on the opposite side of the imaging element packaging circuit board 13 to the side on which the imaging element package 12 is mounted. Each cable of a composite cable 15 is joined to a land provided on a side surface of the cable attachment part 21. A flow channel is formed within a substrate cooling part 27 of the cable attachment part 21, and an inlet port and an outlet port of the flow channel are arranged on a surface on the composite cable 15 side. A coolant supply tube 25 and a coolant discharge tube 26 are disposed within the composite cable 15. The coolant supply tube 25 and the coolant discharge tube 26 are connected to the inlet port and the outlet port of the substrate cooling part 27 to circulate the coolant.COPYRIGHT: (C)2015,JPO&INPIT【課題】径方向への拡大を行うことなく、撮像素子の効率的な冷却を行う冷却構造を提供する。【解決手段】撮像素子パッケージ12を撮像素子実装回路基板13に実装する。撮像素子実装回路基板13において、撮像素子パッケージ12が実装される側とは反対側にケーブル取付部21を設ける。複合ケーブル15の各ケーブルをケーブル取付部21の側面に設けられたランドに接合する。ケーブル取付部21の基板冷却部27内に流路を形成し、流路の流入口、流出口を複合ケーブル15側の面に設ける。複合ケーブル15内に冷媒供給用の供給チューブ25と冷媒排出用の排出チューブ26を配設する。供給チューブ25、排出チューブ26を基板冷却部27の流入口、流出口に接続し冷媒を循環させる。【選択図】図1
