OBSERVATION OF PHASE OBJECTS BY OPTICALLY PROCESSED HILBERT TRANSFORM
- 15 July 1967
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 11 (2), 49-51
- https://doi.org/10.1063/1.1755023
Abstract
A method for observing phase objects, based on the Hilbert transform is defined. This is achieved by spatial filtering. The amplitude images obtained are characterized by their high luminosity. The objects are correctly imaged, even if the phase varies slowly (low frequency objects), which is not the case with conventional methods such as the phase contrast and central dark ground methods. The method also permits easy measurement of geometrical aberrations, for the Hilbert transforms of aberrant wavefronts are more easily interpreted than with the Foucault method.Keywords
This publication has 2 references indexed in Scilit:
- Linéarité en Imagerie CohérenteOptica Acta: International Journal of Optics, 1965
- Phase contrast, a new method for the microscopic observation of transparent objectsPhysica, 1942