ELECTRODE STRUCTURE FOR CREATING ELECTRICAL POTENTIAL GRADIENT

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Abstract

The present application relates to liquid crystal optical devices. It has been discovered that the problem of electric field discontinuity due to a discrete electrode arrangement in an LC-GRIN (or TLCL) optical device having a stepped voltage distribution in space can be solved by the use of phase shifted drive signals while using discrete shaped electrodes or by the use of a relatively high dielectric constant layer (HDCL), placed near the stepped electrode, which can "smoothen" the electric potential profile and reduce the artifacts due to the steps in electric field caused by the discrete turns or steps of the stepped electrode. Such HDCLs may be fabricated much easier compared to weakly conductive layers (WCLs).