We have used a computer-generated holographic optical element (HOE) with electronic speckle pattern interferometry to calculate the interference phase corresponding to the deformation of a test object from a single TV frame. The HOE is a modified crossed phase grating that introduces a known phase change between the ∓1 diffracted orders, without being translated. The progressive propagation of transient mechanical waves was measured with an rms precision of 2π/30.
© 1999 Optical Society of America
(090.2890) Holography : Holographic optical elements
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry
Bernardino Barrientos García, Andrew J. Moore, Carlos Pérez-López, Lingli Wang, and Theo Tschudi, "Transient Deformation Measurement with Electronic Speckle Pattern Interferometry by Use of a Holographic Optical Element for Spatial Phase Stepping," Appl. Opt. 38, 5944-5947 (1999)