| 摘要 |
An endoscope (10) which is equipped, at the leading end portion (11A) of an insertion part (11), with a lens (31), a lens frame (34) that holds the lens (31), and a junction member (33) which watertightly affixes the lens (31) to the lens frame (34) and which is constituted of an Sn alloy solder that forms chemical bonds involving oxygen and that contains at least any of Zn, Sb, Al, and In and has a melting point of 200°C or lower. |
