Attachable optical element arrangements and methods
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United States of America Patent
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May 10, 2016
Grant Date -
Nov 24, 2011
app pub date -
Feb 1, 2010
filing date -
Jan 30, 2009
priority date (Note) -
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Abstract
A light attenuating optical arrangement for assembly to an eye-shielding device includes an optical element having an electronically controlled guest-host liquid crystal cell for variably attenuating transmission of light, the liquid crystal cell including first and second plastic substrates. A controller is electrically connected to the liquid crystal cell and is configured to selectively supply a voltage across the liquid crystal cell. The controller is provided with a means for electrically connecting the controller to a power source, and a means for attaching the controller to the eye-shielding device. The optical element is provided with a means for attaching an outer periphery of the optical element to a surface of a viewing lens of an eye-shielding device.
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