Optical velocimeter by second order correlation
| Autor: | Yaming Feng, Da-xiao Xu, Yaji Suo, Wenjie Wan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Coherence time business.industry Order (ring theory) Inverse Condensed Matter Physics 01 natural sciences Industrial and Manufacturing Engineering Atomic and Molecular Physics and Optics Light scattering 010309 optics Correlation Optics Transverse velocity Microfluidic channel 0103 physical sciences Fluid dynamics 010306 general physics business Instrumentation |
| Zdroj: | Laser Physics. 27:065602 |
| ISSN: | 1555-6611 1054-660X |
| DOI: | 10.1088/1555-6611/aa6e7f |
| Popis: | Motional information can be buried inside the temporal statistics of scattering light. Here we explore the second order correlation of scattering light to trace back the transverse velocity of objects, verifying the inverse relationship between the coherence time and the velocity. Based on this principle, a new type of optical velocimeter is demonstrated, which has been further applied to study the fluid flow inside a microfluidic channel. This new noninvasive and easy-to-implement velocimeter may offer a new avenue in many applications. |
| Databáze: | OpenAIRE |
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