Real-time trichromatic holographic interferometry: preliminary study

Felix Albe; Myriam Bastide; Jean-Michel Desse; Jean-Louis H. Tribillon

doi:10.1117/12.321013

19 August 1998 Real-time trichromatic holographic interferometry: preliminary study

Felix Albe, Myriam Bastide, Jean-Michel Desse, Jean-Louis H. Tribillon

Proceedings Volume 3573, OPTIKA '98: 5th Congress on Modern Optics; (1998) https://doi.org/10.1117/12.321013
Event: OPTIKA '98: Fifth Congress on Modern Optics, 1998, Budapest, Hungary

Abstract

In this paper we relate our preliminary experiments on real- time trichromatic holographic interferometry. For this purpose a CW `white' laser (argon and krypton of Coherent- Radiation, Spectrum model 70) is used. This laser produces about 10 wavelengths. A system consisting of birefringent plates and polarizers allows to select a trichromatic TEM₀₀ triplet: blue line ((lambda) equals 476 nm, 100 mW), green line ((lambda) equals 514 nm, 100 mW) and red line ((lambda) equals 647 nm, 100 mW). In a first stage we recorded a trichromatic reflection hologram with a separate reference beam on a single-layer silver-halide panchromatic plate (PFG 03C). After processing, the hologram is put back into the original recording set-up, as in classical experiments on real-time monochromatic holographic interferometry. So we observe interference fringes between the 3 reconstructed waves and the 3 actual waves. The interference fringes of the phenomenon are observed on a screen and recorded by a video camera at 25 frames per second. A color video film of about 3 minutes of duration is presented. Some examples related to phase objects are presented (hot airflow from a candle, airflow from a hand). The actual results show the possibility of using this technique to study, in real time, aerodynamic wakes and mechanical deformation.

Citation Download Citation

Felix Albe, Myriam Bastide, Jean-Michel Desse, and Jean-Louis H. Tribillon "Real-time trichromatic holographic interferometry: preliminary study", Proc. SPIE 3573, OPTIKA '98: 5th Congress on Modern Optics, (19 August 1998); https://doi.org/10.1117/12.321013

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