Visualization of the phase singularities in wavefront sensors

Valerii P. Aksenov; Viktor A. Banakh; Olga V. Tikhomirova

doi:10.1117/12.317703

3 August 1998 Visualization of the phase singularities in wavefront sensors

Valerii P. Aksenov, Viktor A. Banakh, Olga V. Tikhomirova

Proceedings Volume 3487, International Conference on Singular Optics; (1998) https://doi.org/10.1117/12.317703
Event: International Conference on Singular Optics, 1997, Partenit, Crimea, Ukraine

Abstract

Feasibility of noninterferometric methods to measure the phase distribution in laser beam cross-section for visualization of the vortex dislocations of optical speckle-field wavefront is analyzed. Peculiarities of the phase retrieval from the measured intensity distribution (the phase problem in optics) and from the wave front slopes measured by the Hartman sensor are discussed. A concept of the vortex and potential parts of the phase is introduced. An analytic formula to retrieve the potential phase from the measured intensity distribution of optical speckle-field has been obtained. We show that the considered ways of measurements allow the positions of the dislocations centers to be sensed and spatial configuration of the intensity zero-lines to be reconstructed.

Citation Download Citation

Valerii P. Aksenov, Viktor A. Banakh, and Olga V. Tikhomirova "Visualization of the phase singularities in wavefront sensors", Proc. SPIE 3487, International Conference on Singular Optics, (3 August 1998); https://doi.org/10.1117/12.317703

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