Analysis of a multi-angle FOV forward scattering probe

Barry Gross; Fred Moshary; Yiping Zhang; Samir A. Ahmed

doi:10.1117/12.452798

9 January 2002 Analysis of a multi-angle FOV forward scattering probe

Barry Gross, Fred Moshary, Yiping Zhang, Samir A. Ahmed

Proceedings Volume 4484, Lidar Remote Sensing for Industry and Environment Monitoring II; (2002) https://doi.org/10.1117/12.452798
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Traditional particle sizing techniques employing forward scattering angles to separate detection channels. These techniques require 2D detector geometry as well as collimating optics. Under certain approximations, forward scattering may be analyzed as a diffraction process that greatly simplifies data inversion. However, in that process, much of the particle size sensitivity in the sub-micron regime is lost due to the severe limits imposed by the diffraction approximation. To both improve the size range of operation and to develop a practical in-situ probe, we investigate another geometry that utilizes a simple single fiber-optic spectro radiometric detector in combination with a mechanism providing multiple field of view of the sample. This is obtained by using an expanding aperture that opens to a set of discrete radii. Different regions of the angular scattering spectrum are obtained by calculating the scattered signal difference between neighboring radii. For sizing applications, the system scattering kernels within Mie Scattering theory are calculated for unit concentration and variable size parameter 1 for each aperture using a simplified far-field plane wave approximation. The resulting multi angular/multispectral kernels provide a superset of scattering information that can lead to improved inversion capabilities to those obtained from multiangle measurements alone.

Citation Download Citation

Barry Gross, Fred Moshary, Yiping Zhang, and Samir A. Ahmed "Analysis of a multi-angle FOV forward scattering probe", Proc. SPIE 4484, Lidar Remote Sensing for Industry and Environment Monitoring II, (9 January 2002); https://doi.org/10.1117/12.452798

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