Fabrication and characterization of the binary diffractive concave lens with 2 mm-focal-length on a Cyclic Olefin Polymer film

摘要

To spread laser or LED light widely, the fabrication of the binary diffractive concave lens on the cyclic olefin polymer film with the 2 mm-order-focal lengths is carried out. By using the binary diffractive concave lens, the laser light can spread widely. In order to the 1st order diffraction, the optimum structure is existed.