Claims
- 1. A UV-A, UV-B discriminating sensor comprising:
- a first sensor formed on a substrate material for detecting UV-A radiation having a wavelength not less than 320 nm and not more than 400 nm, and
- a second sensor formed on said substrate material in parallel for detecting UV-B radiation having a wavelength not less than 280 nm and not more than 320 nm,
- wherein said first sensor comprises a photochromic layer formed on the substrate material, wherein said photochromic layer comprises a photochromic composition responsive to ultraviolet radiation having a wavelength not less than 280 nm and not more than 400 nm, and a first pigment layer formed on the photochromic layer, wherein said first pigment layer comprises a UV radiation absorbing pigment which absorbs ultraviolet radiation having a wavelength not more than 320 nm, and wherein UV-A and visible radiation pass through said first pigment layer; and
- said second UV sensor comprising a photochromic layer formed on the substrate material, wherein said photochromic layer comprises a photochromic composition responsive to ultraviolet radiation having a wavelength not less than 280 nm and not more than 400 nm, and a second pigment layer formed on the photochromic layer, wherein said second pigment layer comprises a UV radiation absorbing pigment which absorbs ultraviolet radiation having a wavelength not less than 320 nm and not more than 400 nm, and wherein UV-B and visible radiation pass through said second pigment layer.
- 2. A UV-A, UV-B discriminating sensor according to claim 1, wherein said UV radiation absorbing pigment in the first pigment layer of the first sensor is 2'-ethylhexyl-4-methoxy-cinnamate or 2,4-dinitrophenol; and
- said UV radiation absorbing pigment in the second pigment layer of the second sensor is 4-t-butyl-4'-methoxy-dibenzoyl methane.
- 3. A UV-A, UV-B discriminating sensor according to claim 1, wherein said photochromic composition is a spiropyran, fulgide or diallyl ethene.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4-094974 |
Mar 1992 |
JPX |
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4-185668 |
Jun 1992 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/972,546, filed Nov. 6, 1992, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (8)
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0046158 |
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EPX |
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DEX |
1-262425 |
Oct 1989 |
JPX |
2236466 |
Apr 1991 |
GBX |
Non-Patent Literature Citations (1)
Entry |
"Reusable ultraviolet monitors: Design, characteristics, and efficacy", Dan L. Fanselow et al., Journal of the American Academy of Dermatology, 9(5):714-723 (1983). |
Continuations (1)
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Number |
Date |
Country |
Parent |
972546 |
Nov 1992 |
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