OPHTHALMIC DEVICE HAVING ADJUSTABLE FILTERING PROPERTIES
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United States of America Patent
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Issued Date -
May 4, 2023
app pub date -
Dec 17, 2020
filing date -
Dec 20, 2019
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Abstract
The invention provides an ophthalmic device having adjustable filtering properties, comprising at least one first polarizer (18), at least one second polarizer (19) which is fixed relative to said first polarizer, and at least one adjustable filtering member (20) located between said first and second polarizers and configured to rotate a polarization plane of light received from said first polarizer and propagating towards said second polarizer; wherein said adjustable filtering member is configured to admit a plurality of active states, in each of which it rotates the polarization plane according to a respective and predetermined angle.
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