Radiation detector with passive air purge and reduced noise
AssigneeExergen Corporation
InventorFrancesco Pompei
Life of this patent
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Abstract
A method and apparatus for maintaining a viewing window of a detector substantially clean includes enclosing the detector within a housing, and moving a target surface relative to the viewing window to create an airflow adjacent the viewing window. The housing can include an aperture through which the viewing window of the sensor views the target surface. Motion of the target surface creates an airflow velocity adjacent the viewing window for maintaining the viewing window substantially clean. To increase the accuracy of the detector, a high emissivity area is provided on an outside surface of the housing which faces the target surface.
Claims23
A method for maintaining a viewing window of a sensor substantially clean, comprising:
- enclosing the sensor within a housing;
- and
- moving a target surface relative to the viewing window to create an airflow adjacent the viewing window;
- the housing including an aperture through which the viewing window of the sensor views the target surface, motion of the target surface creating an airflow velocity adjacent the viewing window for maintaining the viewing window substantially clean.
A passive cleaning system for maintaining a viewing window of a sensor substantially clean, comprising a housing enclosing the sensor, the housing being disposed above a moving target surface which creates an airflow adjacent the viewing window, the housing including an aperture through which the viewing window of the sensor views the target surface, motion of the target surface creating an airflow velocity adjacent the viewing window for maintaining the viewing window substantially clean.
A temperature detecting system comprising a sensor disposed within a housing, the sensor including a viewing window for viewing a target surface which moves relative to the viewing window to create an airflow adjacent the viewing window, the housing including an aperture through which the viewing window views the target surface, motion of the target surface creating an airflow velocity adjacent the viewing window for maintaining the viewing window substantially clean.
Dependencies are inferred from the claim text.