| 摘要 |
PROBLEM TO BE SOLVED: To provide a polarized light separating element capable of relatively easily forming a large-area diffraction grating with a simple step without requiring a high-level technology such as high-precision mask alignment, and to provide a manufacturing method of the polarized light separating element. SOLUTION: The polarized light separating element is constituted such that a rugged pattern 2 constituting the diffraction grating is formed on the surface of a base material 1 made of material having light transmissivity in the usage wavelength range and at least two or more surfaces of protruded parts 3 of the rugged pattern 2 are covered with a film 4 made of material comprising a metal or a metal compound. Therein, the large-area diffraction grating can be simply and precisely formed according to oblique vapor deposition in twice. COPYRIGHT: (C)2006,JPO&NCIPI
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