MULTI-TWIST RETARDERS FOR BROADBAND POLARIZATION TRANSFORMATION AND RELATED FABRICATION METHODS

摘要

An optical element includes at least two stacked birefringent layers having respective local optical axes that are rotated by respective twist angles over respective thicknesses of the at least two layers, and are aligned along respective interfaces between the at least two layers. The respective twist angles and/or the respective thicknesses are different. The at least two stacked birefringent layers may be liquid crystal polymer optical retarder layers. Related devices and fabrication methods are also discussed.