Abstract
A new, compact laser Doppler velocimetry is proposed, which is composed of a single-mode vertical-cavity surface-emitting laser modulated by a dynamical triangular current and a collimating lens. It can indicate the direction of velocity without ambiguity in the wide dynamic range of 5.2mm/s to 479.9mm/s when the sampling time is 0.1 second in the measurement. The accuracy of velocity measurement is better than 3.1% in the whole velocity range. What's more, this LDV works very well on different diffusing surfaces, even on a black glossy photographic paper.
Original language | English |
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Article number | 34 |
Pages (from-to) | 199-204 |
Number of pages | 6 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 5644 |
Issue number | PART 1 |
DOIs | |
Publication status | Published - 15 Jun 2005 |
Externally published | Yes |
Event | Optoelectronic Devices and Integration - Beijing, China Duration: 8 Nov 2004 → 11 Nov 2004 |
Keywords
- Directional discrimination
- Frequency modulation
- Laser Doppler velocimetry
- Self-mixing
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering