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Updated: May 9, 2026

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
Published on: July 5, 2016
High temperature measurements of martensitic transformations using digital holography
Benjamin P Thiesing1, Christopher J Mann, Sebastien Dryepondt
1Department of Physics and Astronomy, Northern Arizona University, Flagstaff, Arizona 86011, USA. bpt6@nau.edu
Abstract:
During thermal cycling of nickel-aluminum-platinum (NiAlPt) and single crystal iron-chromium-nickel (FeCrNi) alloys, the structural changes associated with the martensite to austenite phase transformation were measured using dual-wavelength digital holography. Real-time in situ measurements reveal the formation of striations within the NiAlPt alloy at 70°C and the FeCrNi alloy at 520°C. The results demonstrate that digital holography is an effective technique for acquiring noncontact, high precision information of the surface evolution of alloys at high temperatures.

