ÜV2 - From Analog to Digital Holography – What is the Benefit?

W. Osten
There are several three-dimensional (3D) imaging methods based on interferometry that allow the measurement of minute displacements and surface profiles. Methods like holographic interferometry and speckle metrology can provide full-field noncontact information about coordinates, deformations, strains, stresses and vibrations. The basic principle of these methods consists in the transformation of phase changes into recordable intensity changes. Because of the high spatial frequency of these intensity fluctuations the registration of a hologram requires a light sensitive...