FOCUSING AND SENSING APPARATUS, METHODS, AND SYSTEMS

摘要

Apparatus, methods, and systems provide emitting, field-adjusting, and focusing of electromagnetic energy. In some approaches the field-adjusting includes providing an extended depth of field greater than a nominal depth of field. In some approaches the focusing includes negatively-refractive focusing from an interior field region with an axial magnification substantially greaters than one or substantially less than one. In some approaches the focusing and/or field-adjusting includes focusing and/or field-adjusting with a transformation medium, where the transformation medium may include an artificially-structured material such as a metamaterial.