Color changeable optical filter and eyeglasses including same
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United States of America Patent
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Oct 1, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jan 29, 2016
filing date -
Feb 2, 2015
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Abstract
Disclosed are: a practical color changeable optical filter that can change hue or saturation by a relatively simple structure, the color changeable optical filter including two or more polarizers 20, 30 containing a dichroism pigment and a frame 10 that supports the polarizers 20, 30, wherein a polarization plane of light incident on at least one polarizer 30 or a polarization plane of light output from at least one polarizer 20 is rotated relatively, whereby the hue or saturation of light passing through the optical filter is changed; and eyeglasses provided with the color changeable optical filter.
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