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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