Recent Advances In Optical Particle Size Spectroscopy

Robert G. Knollenberg

doi:10.1117/12.955880

18 November 1977 Recent Advances In Optical Particle Size Spectroscopy

Robert G. Knollenberg

Proceedings Volume 0125, Advances in Laser Technology for the Atmospheric Sciences; (1977) https://doi.org/10.1117/12.955880
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

Abstract

Optical techniques continue today as our most extensive methodology in sizing particles. Imaging and light scattering methods are used most extensively. Recent work in light scattering aerosol sizing methods involve Active Scattering with light collection over a 211 steradian solid angle, an off-axis technique with application to in situ measurements at concentrations up to 107cm ^-3, and a single particle multiprobe wherein five separate measurements are performed on a single particle. Imaging systems useful in sizing particles larger than a few microns have also been improved; for instance, an Optical Array Spectrometer has been expanded to provide multilevel isodensitometry with an imaging bandwidth above 1 GHz. The use of an image dissector with multiple apertures is shown to have both light scattering and imaging potential. The evaluation of sampling techniques for special testing include wind tunnel evaluations of aircraft mounted isokinetic sampling probes, ground aspirators for large airborne particles, hot sampling sections for high temperature particle sources, and an in situ particle size spectrometer for in-stack measurements.

Citation Download Citation

Robert G. Knollenberg "Recent Advances In Optical Particle Size Spectroscopy", Proc. SPIE 0125, Advances in Laser Technology for the Atmospheric Sciences, (18 November 1977); https://doi.org/10.1117/12.955880

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available