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Proceedings Paper

The construction of an optical particle counter with sub- and super-micron counting capability
Author(s): R. J. Greaney; O. Ryan; S. G. Jennings; C. D. O'Dowd
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Paper Abstract

An Optical Particle Counter (OPC) has been designed with a single ellipsoid reflector as the main optical element. Photodiodes with low noise transimpedance are used to detect forward and backscatter responses of particles scattering laser light (685 nm) at the ellipsoid focus. The Zemax® ray tracing program has been used to estimate the OPC's light collection efficiency. The design process has included modeling the optical response of various lenses, reflector coatings, and laser wavelengths. Simulations show that our OPC with a single ellipsoid reflector has 58.2% total efficiency for collecting forward and backscattered light.

Paper Details

Date Published: 7 November 2007
PDF: 12 pages
Proc. SPIE 6739, Electro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications, 673914 (7 November 2007); doi: 10.1117/12.768170
Show Author Affiliations
R. J. Greaney, National Univ. of Ireland/Galway (Ireland)
O. Ryan, National Univ. of Ireland/Galway (Ireland)
S. G. Jennings, National Univ. of Ireland/Galway (Ireland)
C. D. O'Dowd, National Univ. of Ireland/Galway (Ireland)


Published in SPIE Proceedings Vol. 6739:
Electro-Optical Remote Sensing, Detection, and Photonic Technologies and Their Applications
Gary W. Kamerman; Ove K. Steinvall; Keith L. Lewis; Keith A. Krapels; Keith A. Krapels; John C. Carrano; Arturas Zukauskas, Editor(s)

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