Photodetector for ultraviolet light radiation
AssigneeOsram Opto Semiconductor GmbH & Co. OHG
InventorWerner Kuhlmann
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Abstract
An ultraviolet light radiation photodetector includes a quartz lens, a UV transmission filter, a silicon photodiode, and a scintillator layer. After passing through the quartz lens and the UV transmission filter, the UV light to be detected is converted in the scintillator layer, preferably applied to the surface on a light-exiting side of the UV transmission filter, into light radiation of a greater wavelength, for which the silicon photodiode exhibits a greater sensitivity. If desired, an additional edge filter can be used to improve the configuration's drop in sensitivity between 350 and 400 nm.
Claims17
An ultraviolet light radiation photodetector, comprising:
- a semiconductor photodiode for detecting light along a light receiving path;
- an ultraviolet transmission filter disposed upstream of said semiconductor photodiode with respect to the light receiving path;
- a conversion element disposed between said UV ultraviolet transmission filter and said semiconductor photodiode, said conversion element formed of a conversion material mixed into silicone, said conversion element converting at least a portion of ultraviolet light radiation passing through said ultraviolet transmission filter into light radiation having a longer wavelength.
An ultraviolet light radiation photodetector, comprising:
- a semiconductor photodiode for detecting light along a light receiving path;
- an ultraviolet transmission filter disposed upstream of said semiconductor photodiode with respect to the light receiving path;
- a conversion element disposed between said ultraviolet transmission filter and said semiconductor photodiode, said conversion element having conversion material and converting at least a portion of ultraviolet light radiation passing through said ultraviolet transmission filter into light radiation having a longer wavelength;
- and
- an edge filter disposed between said ultraviolet transmission filter and said semiconductor photodiode, said edge filter suppressing some of ultraviolet and blue components of light radiation produced by said conversion material.
Dependencies are inferred from the claim text.