Perrett, B, Harris, M, Pearson, GN, Willetts, DV and Pitter, MC 2003, 'Remote photoacoustic detection of liquid contamination of a surface' , Applied Optics, 42 (24) , pp. 4901-4908.
Full text not available from this repository.Abstract
A method for the remote detection and identification of liquid chemicals at ranges of tens of meters is presented. The technique uses pulsed indirect photoacoustic spectroscopy in the 10-μm wavelength region. Enhanced sensitivity is brought about by three main system developments: (1) increased laser-pulse energy (150 μJ/pulse), leading to increased strength of the generated photoacoustic signal; (2) increased microphone sensitivity and improved directionality by the use of a 60-cm-diameter parabolic dish; and (3) signal processing that allows improved discrimination of the signal from noise levels through prior knowledge of the pulse shape and pulse-repetition frequency. The practical aspects of applying the technique in a field environment are briefly examined, and possible applications of this technique are discussed.
| Item Type: | Article |
|---|---|
| Themes: | Subjects / Themes > T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication (Inc. www, lidar, radio, radar, phone, TV) Subjects / Themes > Q Science > QC Physics > QC350-467 Optics. Light Subjects / Themes > Q Science > QC Physics > QC221-246 Acoustics - Sound Subjects outside of the University Themes |
| Schools: | Schools > School of the Built Environment |
| Journal or Publication Title: | Applied Optics |
| Publisher: | Optical Society of America |
| Refereed: | Yes |
| ISSN: | 0003-6935 |
| Depositing User: | H Kenna |
| Date Deposited: | 09 Oct 2007 14:43 |
| Last Modified: | 27 Aug 2021 22:03 |
| URI: | https://usir.salford.ac.uk/id/eprint/762 |
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