OPTICAL SYSTEM UNIT FOR ENDOSCOPE, ENDOSCOPE, AND ADHESIVE FOR ENDOSCOPE OPTICAL MEMBER

摘要

PROBLEM TO BE SOLVED: To align a lens with a lens barrel with high accuracy and to suppress a cost increase.

SOLUTION: An imaging optical system unit 35 includes an imaging optical system 26, and the lens barrel 37 holding the imaging optical system 26. The lens-barrel 37 is mounted to a distal end hard part 24. The imaging optical system 26 has a lens group 38 held in the lens-barrel 37. When a lens 38A constituting the lens group 38 is adhesively fixed to the lens-barrel 37, an adhesive 51 with glass beads 52 mixed therein is poured into a clearance T formed between the outer peripheral surface 55 of the lens 38A and the inner peripheral surface 54 of the lens-barrel 37. The grain diameter of the glass beads 52 is selected according to the clearance T.

COPYRIGHT: (C)2012,JPO&INPIT