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Optical Spectral Reflectance Sensor and Controller
(U.S. Patent and Trademark Office, 2003-07-22)
A spectral reflectance sensor including: a light source for emitting a modulated beam of red light; a light source for emitting a modulated beam of near infrared light; a receiver for receiving reflected light produced by ...
Optical Spectral Reflectance Sensor and Controller
(U.S. Patent and Trademark Office, 2005-02-15)
A spectral reflectance sensor including: a light source for emitting a modulated beam of red light; a light source for emitting a modulated beam of near infrared light; a receiver for receiving reflected light produced by ...