ENDOSCOPE OPTICAL SYSTEM WITH SOLDERED WINDOW

摘要

PROBLEM TO BE SOLVED: To provide an endoscope optical system without fear of inducing a window breakage caused by a window soldered part even by frequent and large temperature differences. SOLUTION: In an endoscope optical system with a soldered part 8 in between a metal housing 1 to accept a cylindrical circumference 5 of a window 2 on a cylindrical inner face 7 with a gap on an end part opening and a metallized end face 5 of the window 2, the window 2 is soldered only on the soldered range of the circumference 5 constituted as a ring range 6 in the length in the axis line direction shorter than the thickness of the window 2 and, on the other hand, the residual circumference range is constituted in a condition without soldering.