Self-addressed diffractive lens schemes for the characterization of LCoS displays

HAOLIN ZHANG; ANGEL LIZANA; CLAUDIO IEMMI; ANDRÉS MÁRQUEZ; IGNACIO MORENO; JUAN CAMPOS

Congreso; Emerging Liquid Crystal Technologies XIII; 2018

We proposed a self-calibration method to calibrate both the phase-voltage look-up table and the screen phase distributionof Liquid Crystal on Silicon (LCoS) displays by implementing different lens configurations on the studied device withina same optical scheme. On the one hand, the phase-voltage relation is determined from interferometric measurements,which are obtained by addressing split-lens phase distributions on the LCoS display. On the other hand, the surfaceprofile is retrieved by self-addressing a diffractive micro-lens array to the LCoS display, in a way that we configure aShack-Hartmann wavefront sensor that self-determines the screen spatial variations. Moreover, both the phase-voltageresponse and the surface phase inhomogeneity of the LCoS are measured within the same experimental set-up, withoutthe necessity of further adjustments. Experimental results prove the usefulness of the above-mentioned technique forLCoS displays characterization.