A non-optical real-time particle fallout monitor

Details A non-optical real-time particle fallout monitor A non-optical real-time particle fallout monitor

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1329..168c&link_type=abstract

IN: Optical system contamination: Effects, measurement, control II; Proceedings of the Meeting, San Diego, CA, July 10-12, 1990

Physics

Degradation, Optical Properties, Particle Acceleration, Surface Properties, Air Flow, Laminar Flow, Quartz Crystals

Scientific paper

The paper describes a size-selective fallout monitor that can be employed to assess the degradation of sensitive optical surfaces as well as facilitate the analysis of particle types. The device combines a vertical elutriator and a quartz crystal microbalance, and only particles greater than a specific size can pass through an upward laminar flow generated in the device. The larger particles cause a frequency shift in the crystal oscillator, thereby permitting the measurement of the fallout associated with the contamination of optical instruments.

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