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Patent Searching and Data


Title:
DIFFRACTION OPTICAL ELEMENT AND METHOD FOR PRODUCING DIFFRACTION OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/199707
Kind Code:
A1
Abstract:
The present invention provides a diffraction optical element capable of easily obtaining a desired optical property, and a method for producing the same. This diffraction optical element comprises a first material layer (11) having a diffraction grating shape, and a second material layer (12) stacked on the first material layer (11). The diffraction grating shape forms a plurality of concentric ring zones Rn in a state of being seen in plan view from the stacking direction (direction D) of the first material layer (11) and the second material layer (12), and the radius of the innermost ring zone R1 among the ring zones Rn is smaller than any one of pitches P1-P9 between the ring zones Rn.

Inventors:
FUJIWARA MASANORI (JP)
WATANABE SEIICHI (JP)
MURAKAMI YASUNORI (JP)
Application Number:
PCT/JP2021/005119
Publication Date:
October 07, 2021
Filing Date:
February 10, 2021
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/18; G02B3/08
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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