| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 17, Number 1, 2021
|
|
|---|---|---|
| Article Number | 27 | |
| Number of page(s) | 13 | |
| DOI | https://doi.org/10.1186/s41476-021-00174-7 | |
| Published online | 19 December 2021 | |
Research
Simple method to evaluate the pixel crosstalk caused by fringing field effect in liquid-crystal spatial light modulators
1
Instituto de Bioingeniería, Universidad Miguel Hernández de Elche, 03202, 03202 Elche, Spain
2
Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica, Universidad Miguel Hernández de Elche, 03202 Elche, Spain
3
Departamento de Física Aplicada, Universidad Miguel Hernández de Elche, 03202 Elche, Spain
4
Department of Physics, San Diego State University, San Diego, CA 2182-1233 , USA
a Correspondence: zhasanirokh@yahoo.com
Received:
20
August
2021
Accepted:
28
November
2021
In this work we provide a simple experimental method to measure and evaluate the pixel crosstalk in phase-only liquid-crystal displays caused by the fringing field effect. The technique is a reverse engineering method that does not require information about the microscopic physical parameters of the liquid-crystal material or details of the fabrication and electronics of the display. Instead, it is based on the overall effect on the diffraction efficiency of displayed binary phase gratings as a function of the addressed gray level. We show how the efficiency of the zero (DC) and first diffraction orders provides valuable information enough to identify and quantify the pixel crosstalk. The technique is demonstrated with a modern phase-only liquid-crystal on silicon (LCOS) spatial light modulator (SLM), illustrating the limitations that this effect imposes to the spatial resolution of the device and providing quantitative measurement of the impact on the diffraction efficiency.
Key words: Liquid-crystals displays / Diffraction gratings / Phase modulation / Fringing
© The Author(s) 2021
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