Interferometric applications of tunable lasers

Romulad Jozwicki

doi:10.1117/12.405981

2 November 2000 Interferometric applications of tunable lasers

Romulad Jozwicki

Proceedings Volume 4238, Laser Technology VI: Applications; (2000) https://doi.org/10.1117/12.405981
Event: Laser Technology VI, 1999, Szczecin, Poland

Abstract

Four different full-field interferometric systems using variable laser wavelength are presented. The measurements of inplane displacements and strains on the surfaces of objects under load with the aid of the grating interferometer and digital speckle pattern interferometer are described. The latter system allows the determination of the amplitude and phase distributions of the modes of vibrating surfaces as well. The measurement of in-plane displacements of rough surfaces using scattered light beams and the determination of surface shape by heterodyne interferometry are presented. In the first three cases current modulated laser diodes currently modulated are exploited, in the last one - wavelength changes of laser radiation by acousto-optic modulators are introduced.

Citation Download Citation

Romulad Jozwicki "Interferometric applications of tunable lasers", Proc. SPIE 4238, Laser Technology VI: Applications, (2 November 2000); https://doi.org/10.1117/12.405981

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