| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hologram element, its manufacturing method, and an illumination apparatus and a projection type display apparatus equipped with the hologram element, and to simultaneously homogenize a plurality of illumination beams entering at various angles . <P>SOLUTION: The element is provided with a plurality of diffractive parts A11 to A77 to diffract beams at various wavelengths entering at various angles from light sources 20R, 20G, 20B to propagate to the almost same illumination region 40. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
