Detection of ultraviolet radiation
AssigneeThomas Swan & Co. Ltd.
InventorsJames H. Nobbs, Peter K. T. Oldring, David Duerden
Life of this patent
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Abstract
A device for detecting ultraviolet radiation comprises a measuring head (101) to receive the ultraviolet radiation and comprising a filter (112) which emits fluorescent light in an amount dependent on the amount of ultraviolet radiation. The fluorescent light emitted is monitored to obtain a measure of the amount of ultraviolet radiation. A means (115) may be included to compensate for the temperature dependence of the filter.
Claims10
A method of monitoring the amount of ultraviolet radiation present at a desired location which comprises:
- providing at said location a filter having opposed parallel planar surfaces linked by an edge and being of the type which emits fluorescent light when exposed to ultraviolet radiation in an amount dependent on the amount of ultraviolet radiation at said location,
- and monitoring the fluorescent light emitted by the filter at said edge to obtain a measure of the amount of ultraviolet radiation at said location.
A device for detecting the amount of ultraviolet radiation present at a desired location comprising:
- (i) a measuring head for positioning at said location,
- (ii) a filter included in said measuring head, said filter having opposed parallel planar surfaces linked by an edge and being of the type which emits fluorescent light when exposed to ultraviolet radiation in an amount dependent on the amount of ultraviolet radiation to which it is exposed, and
- (iii) means for detecting the amount of fluorescent light emitted by the filter at said edge to obtain a measure of the amount of ultraviolet radiation present at said location.
Dependencies are inferred from the claim text.