A previously unreported air-density-related detuning effect for active cavity aerosol optical particle counters is described, and a simple device for correcting the problem is presented. Airborne field tests with and without the correction device illustrate the effect and the good degree to which the deficiency can be overcome. The effect is shown to have an important impact on instrument calibration.
© 1999 Optical Society of America
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(140.3460) Lasers and laser optics : Lasers
James M. Rosen and Norman T. Kjome, "Active Laser Cavity Particle Counters: A Fundamental Problem and Solution for Airborne Application," Appl. Opt. 38, 7321-7324 (1999)