Development of a Two-frame Holographic Imager for Shock Physics Research

Here we introduce a novel multi-frame off-axis digital holographic velocimetry diagnostic for measuring shock front topography, reflectivity, and velocity all spatially resolved in dimensions transverse to the probe beam. The probe laser duration sets the time resolution of reflectivity and topography data, while that of the velocity is fixed by a choice of etalon. In this poster, we will describe the optical layout of the diagnostic, processing techniques, and design considerations for application to shock physics research. We also demonstrate that numerical parametric lenses can remedy wavefront errors in the optical system and that images can be numerically refocused post-shot, vastly improving the depth of field. Finally, we describe a proposed experiment relying on the diagnostic.