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Updated: Jul 6, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Optical correlation by use of partial phase-only modulation with VGA liquid-crystal displays
I Labastida1, A Carnicer, E Martín-Badosa
1Departament de Física Aplicada i Optica, Universitat de Barcelona, Avinguda Diagonal 647, E08028 Barcelona, Spain. nasi@optica.ub.es
Abstract:
The development of liquid-crystal panels for use in commercial equipment has been aimed at improving the pixel resolution and the display efficiency. These improvements have led to a reduction in the thickness of such devices, among other outcomes, that involves a loss in phase modulation. We propose a modification of the classical phase-only filter to permit displays in VGA liquid-crystal panels with a constant amplitude modulation and less than a 2pi phase modulation. The method was tested experimentally in an optical setup.
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