23 June 1995 Portable holographic interferometric device for aircraft inspecting
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Abstract
A new single-beam technique for a continuous reconstruction of volume holograms in photorefractive crystals of symmetry 23 is presented. The doped crystal Bi12TiO20 (Fe,P) possessing diffraction efficiency above 70% is used for real-time holographic interferometry. The major advantage of this technique is an automatic self-adjustment of diffraction in volume holograms, continuous reconstruction of volume holograms, high diffraction efficiency without application of external electric field, high resolution (more than 3000 lines/mm), high vibroprotection stability, low cost using of He-Ne or diode lasers, and portability (single-beam device). A 1 mm crack was detected at a depth of 1.5 mm in airplane wings near a rivet zone using protable adaptive holographic interferometer.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
George Eugene Dovgalenko, Yuri I. Onischenko, Irina I. Loutchkina, Gregory J. Salamo, "Portable holographic interferometric device for aircraft inspecting", Proc. SPIE 2545, Interferometry VII: Applications, (23 June 1995); doi: 10.1117/12.212656; https://doi.org/10.1117/12.212656
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