info:eu-repo/semantics/article
LCoS display phase self-calibration method based on diffractive lens schemes
Fecha
2018-07Registro en:
Zhang, Haolin; Lizana, Ángel; Iemmi, Claudio César; Monroy Ramírez, Freddy A.; Márquez, Andrés; et al.; LCoS display phase self-calibration method based on diffractive lens schemes; Elsevier; Optics And Lasers In Engineering; 106; 7-2018; 147-154
0143-8166
CONICET Digital
CONICET
Autor
Zhang, Haolin
Lizana, Ángel
Iemmi, Claudio César
Monroy Ramírez, Freddy A.
Márquez, Andrés
Moreno, Ignacio
Campos, Juan
Resumen
An experimental method to calibrate Liquid Crystal on Silicon (LCoS) displays by self-generating lens configurations on the studied device is proposed in this paper. On the one hand, a split-lens is displayed in the LCoS to self-generate an interference pattern from which the phase-voltage curve of the modulator is calculated. On the other hand, a microlens array is displayed on the LCoS, within a same experimental set-up, to implement a Shack-Hartmann (S-H) wavefront sensor, from which the display surface profile is retrieved. Specifically, by means of a feasible set-up, the proposed method allows measuring the deviation from flatness of the LCoS displays as well as to determine the phase-voltage response of phase-only SLMs. Experimental results demonstrate a linear tendency phase-voltage curve that ranges from 0 rad up to ∼6.28 rad, for the used light wavelength. Moreover, by extracting the LCoS phase distribution measured with the S-H configuration, the LCoS surface inhomogeneity is corrected by 95%.