IMAGE PICKUP UNIT FOR ENDOSCOPE

摘要

An image pickup unit for endoscope is configured such that a first lens frame and a second lens frame are fitted to each other with a first fitting area and bonded and fixed to each other with a first adhesive at a first frame fixing portion, the second lens frame and a holding frame are fitted to each other with a second fitting area and bonded and fixed to each other with a second adhesive at a second frame fixing portion, the first lens frame, the second lens frame, and the fixing frame are bonded and fixed together with the second adhesive, the second fitting area is larger than the first fitting area, and the second adhesive has a glass transition temperature lower than a glass transition temperature of the first adhesive.

主权项

1. An image pickup unit for endoscope comprising:
an objective lens unit including a first lens frame and a second lens frame; an image pickup device unit including an image pickup device and a holding frame configured to hold the image pickup device; a first frame fixing portion at which the first lens frame and the second lens frame are fitted to each other; and a second frame fixing portion at which the second lens frame and the holding frame are fitted to each other, wherein the first lens frame and the second lens frame are fitted to each other with a first fitting area and bonded and fixed to each other with a first adhesive at the first frame fixing portion, the second lens frame and the holding frame are fitted to each other with a second fitting area and bonded and fixed to each other with a second adhesive at the second frame fixing portion, the first lens frame, the second lens frame, and the holding frame are bonded and fixed together with the second adhesive, the second fitting area is larger than the first fitting area, and the second adhesive has a glass transition temperature lower than a glass transition temperature of the first adhesive.