Abstract
Near-IR-to-visible image conversion using a Hughes silicon liquid crystal light valve1 (LCLV) was demonstrated. An input 1.06-μm laser A, intensity of ~100 μW/cm2 was used to activate the 125-μm thick silicon photoconductor. The photoactivated current generated in the silicon by the 1.06-μm input beam results in a spatial voltage pattern which is transferred to the high impedance liquid crystal layer. This electric field causes molecular reorientation to occur in the liquid crystal film; since the liquid crystal film is birefringent, this reorientation causes the polarization of the visible projection beam (λ2 = 0.633 μm) to be rotated.
© 1987 Optical Society of America
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