ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
An automated laser-beam positioning system has been developed and applied to long-path (700 m) monitoring of atmospheric aerosols. The system is based on a piezoelectric-driven mirror mount whose vertical and horizontal positioning is precisely controlled so as to maximize the return beam intensity. By optimizing the direction of the transmitted beam every 5–10 min, the change in aerosol extinction can be measured to an accuracy of better than 2×10−5 m−1 without interference from beam displacement due to the temperature change. This positioning method allows one to use relatively small detectors and optical components which are easier to operate and maintain when compared with the previous method for the long-path measurement. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1150238
