Optical probing of photoacoustic propagation for noncontact measurement of flows, temperatures and chemical compositions
Abstract
Noncontact techniques of optical probing of photoacoustic pulses provide new opportunities for ultrasonic and/or spectroscopic measurement in hostile environments (e.g., flames, corrosive fluids, dangerous aerosols, etc.) and also basic understanding of photoacoustic generation processes. This paper provides examples of such applications in the new field of 'optical ultrasonics' (whereby ultrasonic determinations of flows, temperatures, etc., are measured optically), including 'optical ultrasonic spectroscopy' (whereby ultrasonic dispersion and relaxations are measured optically).
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- October 1983
- Bibcode:
- 1983STIN...8414496T
- Keywords:
-
- Optical Measurement;
- Photoacoustic Spectroscopy;
- Ultrasonic Spectroscopy;
- Alkalies;
- Chemical Analysis;
- Flow Measurement;
- Measuring Instruments;
- Remote Sensors;
- Temperature Measurement;
- Instrumentation and Photography