发明名称 |
Diffraction optical element and transfer mold therefor |
摘要 |
A diffraction optical element including an element body having a large number of grooves formed on its surface to form a grating, and a grating shape adjusting layer deposited on a grating surface of the element body by oblique incidence or material particles onto the grating surface, wherein the grating shape adjusting layer per se is made of a reflecting film material. By the grating shape adjusting layer, the contour shape of the resulting grating surface in a section perpendicular to a lengthwise direction of the grooves is made not similar to the sectional shape of the element body. A reflecting film may be formed on a grating shape adjusting layer made of another material. A reflecting film may be provided on the element body before a grating shape adjusting layer made of a transparent dielectric material is provided on the reflecting film.
|
申请公布号 |
US6940650(B2) |
申请公布日期 |
2005.09.06 |
申请号 |
US20030418225 |
申请日期 |
2003.04.18 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
SHIMMO KATSUHIDE;NAKAMA KENICHI;SEKIGUCHI YUKINARI;HIKICHI NAOKO |
分类号 |
G02B5/18;(IPC1-7):G02B5/18 |
主分类号 |
G02B5/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|