Aerosol detector using incoherent light source and optical cavity

Abstract

The present disclosure provides an aerosol particle detection system comprising an incoherent light source configured to generate incoherent light, a first mirror and a second mirror positioned to define an optical cavity region therebetween, wherein the optical cavity region receives the incoherent light and allows particles to pass through, and a photodetector positioned to detect transmitted light that has passed through the optical cavity region, wherein the photodetector detects changes in intensity of the transmitted light caused by particles passing through the optical cavity region. The incoherent light source comprises a light-emitting diode configured to emit blue light having a wavelength centered at approximately 430 nanometers. The optical cavity region has a length of approximately 6-10 millimeters. The system further comprises an enclosure defining the optical cavity region with an opening configured to allow particles to enter.

Dependencies are inferred from the claim text.