Abstract

We discuss the resolution limits of digital TV holography used for nondestructive testing. A phase shifting technique converts the interferometric information into a phase distribution image. Spatial low pass filtering improves the phase accuracy at the expense of spatial resolution. Experiments show that spatial details down to 2.5 × 2.5 pixels and displacement below λ/100 may be resolved.

© 1991 Optical Society of America

Nondestructive testing by use of TV holography and deformation phase gradient calculation

Eiolf Vikhagen
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