Electroactive Lenses with Cylinder Rotational Control
Abstract:
An electro-active lens with stacked, rotated cylindrical electro-active lens elements can provide cylinder power along more axes than there are cylindrical electro-active lens elements. For instance, six stacked cylindrical electro-active lens elements, each aligned with a different lens meridian, can produce cylinder power along fifteen unique meridians when actuated up to three at a time. If these fifteen meridians are spaced at 12° increments, then the lens stack can provide cylinder power that is aligned well to correct astigmatism along any axis. Each cylindrical electro-active lens element in the stack can include a liquid crystal layer that is actuated by linear electrodes that are parallel to each other and orthogonal to both the cylindrical electro-active lens element's cylinder axis and optical axis. The electro-active lens can also include a spherical lens element that provides spherical power in addition to any net spherical power produced by the stacked cylindrical electro-active lens elements.
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