Optics: measuring and testing – By shade or color
Patent
1998-10-09
2000-03-28
Hantis, K. P.
Optics: measuring and testing
By shade or color
G01J 346
Patent
active
060438932
ABSTRACT:
Manually portable reflectance spectrometer and method of detection of absorption and reflection of light, wherein the visible and invisible (infrared) light is derived from LEDs. A phototransistor or photodiode measures the light reflected by the surface being measured, and a digital converter ADC translates the phototransistor's output into a digital format display. Three or more LEDs blue, aqua, green, yellow, orange, crimson, red and infrared provide a range of readings across the visible and infrared spectrum.
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Joseph Schnable et al.: Low-Cost Colorimeter; Electronics Experimenter's Handbook--Summer 1995.
Allan H. Treiman: Alta.RTM. Reflectance Spectrometer--Introduction And Classroom Lessons--Published Aug. 1998.
Shelfer Tad D.
Treiman Allan H.
Hantis K. P.
Semmes John Gibson
Universities Space Research Association
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