Fabry-Perot interferometer system for high-speed velocity measurement

Lun K. Cheng; Anastasius J.A. Bruinsma; Wim C. Prinse; Kees Smorenburg

doi:10.1117/12.273410

28 May 1997 Fabry-Perot interferometer system for high-speed velocity measurement

Lun K. Cheng, Anastasius J.A. Bruinsma, Wim C. Prinse, Kees Smorenburg

Proceedings Volume 2869, 22nd International Congress on High-Speed Photography and Photonics; (1997) https://doi.org/10.1117/12.273410
Event: 22nd International Congress on High-Speed Photography and Photonics, 1996, Santa Fe, NM, United States

Abstract

The Fabry-Perot Velocity Interferometer System (F-PVIS) is designed and built for measuring the Doppler shift of light by recording positional changes in the interferometric pattern behind the Fabry-Perot interferometer. The velocity of a surface can be deduced from the Doppler shift which is caused by reflection on the moving surface. The finesse of the Fabry-Perot interferometer is found to be about 50. The F-PVIS is designed for measuring velocities of up to 20 km/s. The sensitivity of this system can be tuned by changing the distance between the Fabry-Perot mirrors. In the most sensitive state of operation, the accuracy is found to be better than 100 m/s while the time resolution is typically a few ns. In addition to the velocity measurement of the moving surface in the electric gun experiments, the fiber optic F-PVIS can be used for other measurements. By embedding the optical fiber into the target material, information about the shock wave inside the target can be achieved.

Citation Download Citation

Lun K. Cheng, Anastasius J.A. Bruinsma, Wim C. Prinse, and Kees Smorenburg "Fabry-Perot interferometer system for high-speed velocity measurement", Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); https://doi.org/10.1117/12.273410

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