Optical unit and endoscope
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United States of America Patent
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Aug 11, 2020
Grant Date -
Feb 1, 2018
app pub date -
Oct 12, 2017
filing date -
Apr 15, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An optical unit includes: a cylindrical fixing member configured to retain at least one of an object-side fixed lens group and an image-side fixed lens group; a cylindrical movable member configured to retain a movable lens group between the groups and arranged on a radial-direction inner side of the fixing member slidablly with respect to the fixing member, the cylindrical movable member having a same central axis as the cylindrical fixing member; a voice coil motor including: a coil arranged in the fixing member; and magnets arranged on the movable member and magnetically polarized in a direction intersecting with the central axis, the voice coil motor being capable of moving the movable member relative to the fixing member along a direction of the central axis; and a rotation restricting member configured to restrict rotation of the movable member about the central axis with respect to the fixing member.
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