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US 5,514,871 AGranted
Optical radiation sensor device
AssigneeTrojan Technologies Inc.
InventorsStewart J. Hayes, Richard Pearcey, Philip T. White, Peter R. Andreae, Mark R. Lowenstine
Life of this patent
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Abstract
An optical radiation sensor comprising a housing having an inlet which allows radiation to enter the housing, and further comprising the following elements serially disposed after the inlet in the path of the radiation: attenuating aperture means, filter means and sensor means. A fluid disinfection system incorporating the sensor is also described.
Claims11
An optical radiation sensor comprising:
- a housing having an inlet which allows radiation to enter the housing;
- attenuating aperture means disposed in said housing, for attenuating radiation passing through said inlet;
- filter means capable of removing visible radiation from radiation passing through said aperture means;
- sensor means capable of detecting and responding to ultraviolet radiation passing through said filter means;
- and
- stray radiation reducing means comprising an uneven surface disposed along an interior surface of said housing and off a radiation path, for reducing the amount of stray radiation reaching said sensor means.
3 more elements
Dependencies are inferred from the claim text.