A non-optical real-time particle fallout monitorThe 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.
Document ID
19910070367
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chuan, Raymond L. (Femtometrics Costa Mesa, CA, United States)
Bowers, William D. (Femtometrics Costa Mesa, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Optical System Contamination: Effects, Measurement, Control II