14 February 2005 A miniaturized laser-diode-based optical sensor for laser particle counter
Author Affiliations +
Abstract
A miniature optical sensor for laser particle counter is described, and some calculated and test results are reported in this paper. A reflective spherical mirror coated with highly reflective optical film is applied as collecting element for scattered light, and a PIN photodiode with high performance is used as the photo-detector. A band-pass preamplifier is used to eliminate lower-frequency electromagnetic interference from external environment, as well as to filter high-frequency components from electronic noise. An air sampling system can provide a very constant flow rate. The smallest particle diameter of the optical sensor is 0.3 microns with a signal-to-noise ratio exceeding 2:1.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chunlei Liang, Huijie Huang, Bingqiang Ren, Yongkai Zhao, "A miniaturized laser-diode-based optical sensor for laser particle counter", Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); doi: 10.1117/12.572789; https://doi.org/10.1117/12.572789
PROCEEDINGS
6 PAGES


SHARE
Back to Top