Infrared reflection and absorption system for measuring the quantity of a substance that is sorbed in a base material

Claim 1

APPARATUS FOR MEASURING THE AMOUNT OF A SUBSTANCE THAT IS SORBED IN A SOLID MATERIAL COMPRISING A RADIATION SOURCE THAT EMITS INFRARED RADIATION INCLUDING WAVELENGTHS LYING WITHIN DESIRED INFRARED SPECTRAL BANDS FOR IMPINGEMENT ON THE MATERIAL, THE REFLECTANCE OF ONE OF THE BANDS BEING AFFECTED BY THE AMOUNT OF SUBSTANCE IN THE MATERIAL AND THE REFLECTANCE OF THE OTHER BEING RELATIVELY UNAFFECTED, DETECTOR MEANS INTERCEPTING THE REFLECTED RADIATION AND DEVELOPING CONSECUTIVE PULSATING ELECTRIC SIGNALS PROPORTIONAL TO THE INTENSITY OF RADIATION REFLECTED AT EACH WAVELENGTH BAND, MEANS FOR DEVELOPING ANOTHER SIGNAL DEPENDENT UPON THE RATIO BETWEEN SAID SIGNALS WHICH OTHER SIGNAL CORRESPONDS WITH THE AMOUNT OF THE SUBSTANCE, AND MEANS INTERPOSED BETWEEN SAID SOURCE AND SAID DETECTOR MEANS FOR SELECTING THE INFRARED RADIATION BANDS INTERCEPTED BY THE DETECTOR MEANS.