Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2005-11-01
2005-11-01
Porta, David (Department: 2878)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C250S339060, C250S338100, C250S336100, C250S339100, C250S339120, C250S353000, C250S228000, C356S429000
Reexamination Certificate
active
06960769
ABSTRACT:
A single vane shutter flag is asynchronously controlled so that a measuring system light source is interrupted for a minimum necessary amount of time for standardization/calibration and normalization of InGaAs system detectors. Source/detector hemispheres or serially connected randomly oriented fiber bundles homogenize light passing to the detectors. Light source testing is performed by measuring spectral power distributions at a plurality of light source power levels and comparing the measurements to baseline characteristics established for the light source. Calibration sample life is extended indefinitely by controlling the shutter flag to block source light except for short calibration time periods during which standard light levels are provided.
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Patent Abstracts of Japan; vol. 018, No. 688 (P-1849), Dec. 26, 1994 & JP 06 273626 A (Matsuda Denshi Kogyo:KK), Sep. 30, 1994, abstract.
Burk Gary Neil
Daugherty Dennis Charles
Domin Thomas Michael
Maxson Rodney Dale
Sturm Steven Perry
ABB Inc.
Porta David
Steven & Showalter LLP
Sung Christine
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