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DIFFRACTIVE OPTICAL ELEMENT, OPTICAL SYSTEM, AND O

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专利名称:DIFFRACTIVE OPTICAL ELEMENT, OPTICAL

SYSTEM, AND OPTICAL APPARATUS

发明人:Reona USHIGOME申请号:US131576申请日:20110610

公开号:US20110304916A1公开日:20111215

专利附图:

摘要:A diffractive optical element includes a first diffractive grating including a firstgrating surface and a first grating wall surface, a light shielding member disposed on thefirst grating wall surface, and a second diffractive grating including a second grating

surface and a second grating wall surface, disposed so that the second grating surfacecontacts the first grating surface and the second grating wall surface contacts the lightshielding member. An extinction coefficient k of a material that constitutes the lightshielding member meets the expression of 0.001

申请人:Reona USHIGOME

地址:Utsunomiya-shi JP

国籍:JP

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