Importance

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Abstract

Glasses with multilayered, color-switchable lenses (102) and (104) for blocking harmful radiation include a rim (100) connected to temples (108) and (110). The rim contains a photosensor (116), a color-changing switch (118), a dry-cell power source (120), solar cells (121) and (123), an electronic driver unit (122), and an electronic circuit (124). The color-switchable lenses comprise glass plates (126a), (126b), and (126c), conductive layers (136a), (136c) (142a), and (142b), color polarizers (138a) and (136c), alignment layers (140a), (140c), (146), and (148), a neutral polarizer (144), and liquid-crystal layers (158) and (160). When the photosensor determines that the intensity of incident radiation falls above or below the specified threshold, an amplified signal is sent via the circuit to the electronic driver unit which supplies layers 158 and 160 with voltages which cause the color-switchable lenses to change their spectral transmittance characteristics.

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First Claim