发明名称 |
TRANSMISSION TYPE DIFFRACTION GRATING |
摘要 |
A transmission diffraction optical element is presented in which ridges having a roughly rectangular cross-section shape are disposed parallel to each other at a regular pitch at the surface of a substrate. Striped thin-film layers are formed on these ridges and a thin-film layer is inserted between the substrate and the ridges. The thin-film layers are arranged at a regular pitch identical to the regular pitch of the ridges and the thin-film layer does not have a periodic pattern oriented in the same direction as the periodic pattern of the ridges.
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申请公布号 |
US2008186578(A1) |
申请公布日期 |
2008.08.07 |
申请号 |
US20080018043 |
申请日期 |
2008.01.22 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
HIKICHI NAOKO;NAKAMA KENICHI |
分类号 |
G02B5/18 |
主分类号 |
G02B5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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