Pulsed HF Laser Holographic Interferometry.
Two-dimensional holographic interferometry has been accomplished at wavelengths near 3 microm. The source is a pulsed hydrogen fluoride oscillator-amplifier system. Transverse excitation is achieved with a fast bank discharging into a simple electrode configuration. The spatial detector is a thin film of bismuth, exposed by local evaporation by a single line of the HF laser emission spectrum. Double exposure interferograms covering areas up to ~10 cm(2) in the object plane have been obtained with single-line laser energies of less than a joule.
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