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1. (US20120105855) Diffractive optical element and measurement instrument

المكتب : الولايات المتحدة الأمريكية
رقم الطلب: 13285204 تاريخ الطلب: 31.10.2011
رقم النشر: 20120105855 تاريخ النشر: 03.05.2012
رقم التسليم: 08995057 تاريخ التسليم: 31.03.2015
نوع النشر: B2
التصنيف الدولي للبراءات:
G01B 11/25
G02B 27/42
Description not available in lang arDescription not available in lang ar
المتقدمون: Koji Miyasaka
Asahi Glass Company, Limited
Takuji Nomura
المخترعون: Koji Miyasaka
Takuji Nomura
الوكلاء: Oblon, McClelland, Maier & Neustadt, L.L.P.
بيانات الأولوية: 2010-246518 02.11.2010 JP
العنوان: (EN) Diffractive optical element and measurement instrument
الملخص: front page image
(EN)

A diffractive optical element includes: a first diffractive element in which a plurality of basic units are two-dimensionally arranged; and a second diffractive element in which a plurality of basic units are two-dimensionally arranged, wherein when a direction in which the basic units are arranged in the first diffractive element is a first direction, a direction in which the basic units are arranged in the second diffractive element is a second direction, an angle φ between the first direction and the second direction is such that −|φ1|<φ<|φ1|, and φ≠0, sin φ1=−α/Δx where a closest distance of zero-order light generated when the diffracted light generated by the first diffractive element is further incident on the second diffractive element is Δx and a closest distance of the diffracted light and stray light generated by the second diffractive element is α.