OPTICAL INSTRUMENT, BINOCULARS, EYECUP STRUCTURE, METHOD FOR MOVING EYECUP MEMBER
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United States of America Patent
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Issued Date -
Nov 12, 2020
app pub date -
Jan 31, 2018
filing date -
Jan 31, 2018
priority date (Note) -
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Abstract
An optical instrument including: an optical system which forms a target object image; a magnification changer which changes a magnification of the target object image; an eyecup member; and an eyecup driver which causes the eyecup member to move in association with alteration of the magnification of the target object image made by the magnification changer.
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