Patent ID: 9523636
Filing Date: 2016-12-20
CPC Classification: E21B,G01J,G01N,G01V,H03K,H05B,Y02B

Claim Text:
1. An optical sensor for determining a chemical composition of a sample, the optical sensor comprising: a light source comprising a resistively heated element; a power circuit configured to provide a pulse width modulated voltage signal to the resistively heated element to heat the resistively heated element to a temperature selected to emit black body radiation in a continuum spectral range; an optical delivery system to direct an illumination light to a sample; a sample cavity containing the sample and configured to receive the illumination light; an optical collection system to collect a sample light; a detector synchronized to the pulse width modulated voltage signal, the detector configured to measure the sample light from the optical collection system; and an optical modulator configured to modulate the illumination light at a second frequency.