MANUFACTURING METHOD OF POLARIZATION DIFFRACTION ELEMENT, AND POLARIZATION DIFFRACTION ELEMENT OR HOLOGRAM ELEMENT OBTAINED BY THE MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a polarization diffraction element or a polarization hologram element by a simple manufacturing method.;SOLUTION: A birefringence-inducing part and a part having no birefringence are formed into a grid shape by irradiating a coating film of birefringence-inducing material with polarizing ultraviolet light by the use of a method such as grid-like mask or two-beam interferometry. In the diffraction grating or the hologram element thus manufactured, a periodic structure of refractive index is produced in either refractive index in the parallel direction with respect to the grating or refractive index in the vertical direction with respect to the grating and, in the direction vertical to the above mentioned direction, the periodic structure of refractive index is not exhibited. As the result, the polarization diffraction grating can be provided.;COPYRIGHT: (C)2007,JPO&INPIT