| CPC G02C 7/101 (2013.01) [G02C 7/12 (2013.01); G02F 1/133757 (2021.01); G02F 2202/16 (2013.01)] | 17 Claims |
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1. A variable tint lens comprising:
a first polarizer with a first surface and a second surface parallel to the first surface;
a second polarizer with a first surface and a second surface, the first surface and second surface of the second polarizer substantially parallel to the first surface of the first polarizer;
a liquid crystal layer having liquid crystal molecules between the first polarizer and the second polarizer;
a first conductive film between the first polarizer and the liquid crystal layer;
a second conductive film between the second polarizer and the liquid crystal layer; and
a power supply device electrically coupled to the first conductive film and the second conductive film and configured to supply a voltage to the first conductive film and the second conductive film,
wherein a phase difference between a phase of light passing through the liquid crystal layer and a phase of an incident light satisfies:
 wherein
δ is the phase difference,
δ0 is the phase difference under zero electric field,
ne is a refractive index of liquid crystal molecules, and
no is the refractive index of air for light traveling in the air.
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