Vibration amplitude range enhancement method for a heterodyne interferometer
| Autor: | Yujian Hong, Xinyu Chang, Junsheng Lu, Yuan Yang, Yanan Zeng, Yuan Jia, Xiaodong Hu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Heterodyne
Materials science business.industry Ranging 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Piezoelectricity Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Interferometry Optics Amplitude 0103 physical sciences PMUT Astronomical interferometer Ultrasonic sensor Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology business |
| Zdroj: | Optics Communications. 466:125630 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2020.125630 |
| Popis: | Scanning heterodyne interferometers are widely used in micro-vibration measurements due to its high sensitivity and high resistivity to environment change. However, the amplitude range of scanning heterodyne interferometers is limited by the approximation in the theory to several nanometers. To solve this problem, a method for vibration amplitude range enhancement is proposed. By exploiting the Bessel functions, the interferometer is able to measure vibration amplitude ranging up to several hundred nanometers. The method was validated by measuring a micro-cantilever and the results were desirable. To further demonstrate the method, measurements were performed on a piezoelectric micromachined ultrasonic transducer (PMUT) with the maximum amplitude up to ∼ 300 nm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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