Abstract

I modify the double-phase holographic code to implement complex modulation with a transmission twisted-nematic liquid-crystal display. This device is employed in the mostly phase configuration, for which the phase modulation is coupled with a nonconstant amplitude modulation. The modified double-phase code implements arbitrary complex modulation employing the constrained complex modulation of the display.

© 2003 Optical Society of America

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References

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    [CrossRef]

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Figures (6)

Fig. 1
Fig. 1

Experimental modulation plot for the SLM.

Fig. 2
Fig. 2

Double-pixel cell with the signal and error components.

Fig. 3
Fig. 3

DPH that encodes the real function R=cos2πrρ0.

Fig. 4
Fig. 4

Reconstruction field for the DPH in Fig. 3.

Fig. 5
Fig. 5

DPH that encodes the complex function Cr,θ=cos2πrρ0expiθ.

Fig. 6
Fig. 6

Reconstruction field for the DPH in Fig. 5.

Equations (4)

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Cnm=Mnm1+Mnm2/2,
Enm2=-Enm1.
Nu,v=2iw˜hu,vsinπaun,mEnm1×exp-i2πxnu+ymv,
Nu,v=2iw˜hu,vsinπaun,m-1nEnm1×exp-i2πxnu+ymv.

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