Image pickup unit for endoscope having multiple bonded frames
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United States of America Patent
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Oct 10, 2017
Grant Date -
Mar 23, 2017
app pub date -
Dec 1, 2016
filing date -
Nov 19, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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