Abstract
Arbitrary distribution of refractive-index and birefringence can be realized artificially with the subwavelength structured surface. Various optical elements with subwavelength structure have been developed. The recent trends of studies on the subwavelength optical elements are toward the processing technologies for commercial production and the new applications. An optical lens with antireflection structured surface and a formbirefringence quarter-wave plate were fabricated with injection-molding or hot-embossing methods. A microretardar array was used as a key device of the polarization imaging camera system.
