Patent Document ID: 4404642
Application ID: 06263881
Patent Flag: 1

Claim One:
1. An apparatus for near infrared quantitative analysis providing for correcting wide temperature variations of a sample, the apparatus comprising: (a) means for holding a sample to be analyzed including at least a portion of a wall thereof being transparent to infrared energy, (b) a plurality of infrared emitting diodes positioned to transmit infrared energy toward the sample in the holding means, (c) means for sequentially pulsing the infrared emitting diodes, (d) a plurality of narrow bandpass filters between the infrared emitting diodes and the sample holding means to produce desired wavelengths required for quantitative analysis, (e) sensor means positioned to receive and sense infrared energy transmitted through the sample to be analyzed contained in the holding means, said sensor means producing a signal related to the infrared energy received thereby, (f) temperature measuring means positioned in the sample holding means to measure the temperature of the sample therein and to produce a signal related thereto, (g) computer means for receiving the signals from the sensor means and the temperature measuring means and combining them in a multiple regression equation to compensate for variations in sample temperature, and (h) means for reading out the results of the analysis from the computer means.