Diopter adjustment for optical device with overlapping left-handed and right-handed threads
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United States of America Patent
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Nov 8, 2022
Grant Date -
Oct 27, 2022
app pub date -
Apr 23, 2021
filing date -
Apr 23, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A diopter adjustment device for an optical device such as a riflescope includes a first tubular member having overlapping left-handed and right-handed external threads, a second tubular member has internal threads mated with either the left-handed or right-handed external threads of the first tubular member, and a stop nut threaded onto the first tubular member via internal threads that are of opposite handedness as the internal threads of the second tubular member. A diopter lens is mounted in one of the first and second tubular members and movable therewith relative to the other of the first and second tubular members to adjust a diopter setting or focus of the optical device. Because the internal threads of the nut and the second tubular member have opposite handedness, the nut provides greater resistance to inward movement of the diopter lens than conventional locking diopter adjustments.
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