OPTICAL TRANSMITTER/RECEIVER UNIT

摘要

Provided is an optical transmitter/receiver unit which is capable of waterproofing an optical connection part even when an endoscope or the like is damaged, etc. through use. An optical transmitter/receiver unit 100 comprises an optical transmitter/receiver module 20, an optical connector 30, and a waterproof cap 10 having a bottomed cylindrical body that is open at one end and closed at the other end and which covers the optical connector 30 and the optical transmitter/receiver module 20 from the side of the optical connector 30 to watertightly seal the optical connection part between the optical connector 30 and the optical transmitter/receiver module 20. A metal case 23 has a plurality of step parts 23a-23g with different outer diameters, and the step part 23a which is closest to the optical connection part circumferentially contacts the inner face of the waterproof cap 10.