Optical path deflecting prism for endoscope, oblique-viewing endoscope optical system having the same and endoscope
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United States of America Patent
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Nov 7, 2023
Grant Date -
Mar 11, 2021
app pub date -
Sep 15, 2020
filing date -
Apr 2, 2018
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Abstract
An optical path deflecting prism for endoscope which is used for observing an object in an oblique direction, includes a first prism and a second prism, and the first prism and the second prism are cemented. The first prism has a first polished surface and a second polished surface. The first reflecting surface is a mirror surface having a mirror coating applied to a polished surface of a flat plate, and is fixed by gluing to the fifth polished surface of the second prism upon adjusting an angle so as to correct an optical-axis shift which occurs due to a manufacturing error of the first prism and the second prism.
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