Variable aperture mechanism for cryogenic environment, and method
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United States of America Patent
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Dec 16, 2014
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app pub date -
Jan 31, 2014
filing date -
Jun 11, 2013
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Abstract
A device operable in a ultra-high vacuum and in a cryogenic environment. The device has bi-stable solenoid motors configured to drive a shutter assembly defining an aperture having a first shape when the motors are each disposed in the respective first position, and wherein the aperture has a second shape when the motors are each disposed in the respective second position. Actuators responsive to the motors are thermally isolated from the cryogenic shutter assembly except when the motors position the shutter assembly to change a shape of the aperture. The device is suitable for use in FLIR and other thermally sensitive devices.
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