Abstract

In local reference holographic interferometry and radial shear interferometry, a small portion of the test beam is magnified and used as the reference for the rest of the wave front. The reference portion may be off-center or contain aberrations that complicate measurement of the wave front. An iterative method for correcting the measurement is described here. Information about the aberration in the reference is derived from the interferogram and is used to improve the estimate of the wave front shape. A computer simulation is used to verify operation of the algorithm and estimate the effect of certain input errors.

© 1986 Optical Society of America

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