Optical image stabilizer
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United States of America Patent
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Jul 19, 2016
Grant Date -
Oct 30, 2014
app pub date -
Apr 22, 2014
filing date -
Apr 24, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical image stabilizer for a telescopic instrument having an objective lens, an erect prism, and an eyepiece lens arranged in this order which is capable of compensating for image deteriorations of an observed image due to external vibrations. The optical image stabilizer has a gimbal device mounted on a telescope housing, an external gimbal frame rotatably mounted on the gimbal casing, and an internal gimbal frame with the erect prism fixed thereto. Voice coil motors are provided for rotating the external and the internal gimbal frames. One of the voice coil motors has a coil disposed on the circuit board and a permanent magnet disposed on either one of the external and the internal gimbal frames oppositely to the coil. The remaining voice coil motor has a coil disposed on the circuit board and a permanent magnet disposed on the other gimbal frame oppositely to the coil.
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