VARIABLE TRANSMITTANCE OPTICAL FILTER AND USES THEREOF
First Claim
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1. An optical filter capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage, comprising:
- a) a first and second substantially transparent substrate;
b) a first and second electrode disposed on the surface of at least one of said substrates;
c) a switching material disposed between said first and second substrates and in contact with said first and second electrodes, said switching material comprising one or more chromophores having electrochromic and photochromic properties; and
d) an electrical connection means for electrically connecting said first electrode and said second electrode to a source of electric voltage.
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Abstract
Variable transmittance optical filters capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage are provided. The optical filters comprise a switching material that comprises one or more chromophores that have electrochromic and photochromic properties.
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Citations
24 Claims
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1. An optical filter capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage, comprising:
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a) a first and second substantially transparent substrate; b) a first and second electrode disposed on the surface of at least one of said substrates; c) a switching material disposed between said first and second substrates and in contact with said first and second electrodes, said switching material comprising one or more chromophores having electrochromic and photochromic properties; and d) an electrical connection means for electrically connecting said first electrode and said second electrode to a source of electric voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20, 22, 24)
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17. A method for preparing an optical filter capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage, comprising the steps of:
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a) disposing a layer of a switching material between a first and second substantially transparent substrate wherein a first and second electrode is disposed on a surface of at least one of said substrates such that said switching material is in contact with each electrode; and b) providing an electrical connecting means for connecting said electrodes to a source of electric voltage. - View Dependent Claims (18)
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19. A switching material comprising one or more chromophores having electrochromic and photochromic properties and a solvent, wherein said switching material is capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage.
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21. A variable transmittance window capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage, comprising:
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a) a first and second substantially transparent substrate; b) a first and second electrode disposed on the surface of at least one of said substrates; c) a switching material disposed between said first and second substrates and in contact with said first and second electrodes, said switching material comprising one or more chromophores having electrochromic and photochromic properties; and d) an electrical connection means for electrically connecting said first electrode and said second electrode to a source of electric voltage.
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23. An ophthalmic device capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage, comprising:
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a) a first and second substantially transparent substrate; b) a first and second electrode disposed on the surface of at least one of said substrates; c) a switching material disposed between said first and second substrates and in contact with said first and second electrodes, said switching material comprising one or more chromophores having electrochromic and photochromic properties; and d) an electrical connection means for electrically connecting said first electrode and said second electrode to a source of electric voltage.
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Specification