Title:
FILTER ELEMENT AND IMAGING ELEMENT INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2021/095625
Kind Code:
A1
Abstract:
A filter element 1 comprises a dielectric substrate 3 that is optically transmissive, and a metal thin film 5 that is formed along a main surface 3a of the dielectric substrate 3, wherein the metal thin film 5 is supported by the dielectric substrate 3 so as to allow the transmission of light between the exterior, and one surface 5a and another surface 5b on the opposite side from the one surface 5a, is formed so as to be bent, at equal intervals in one direction along the main surface 3a of the dielectric substrate 3, in a direction substantially perpendicular to the one direction, and has a first surface structure on the one surface 5a and a second surface structure on the other surface 5b, said first surface structure including recessed surfaces 7a and protruding surfaces 7b that are periodically formed in an alternating manner at a specific periodicity along the one direction, and said second surface structure including recessed surfaces 9a and protruding surfaces 9b that are periodically formed in an alternating manner at a specific periodicity along the one direction.
Inventors:
ONO ATSUSHI (JP)
MIYAMICHI ATSUTAKA (JP)
MIYAMICHI ATSUTAKA (JP)
Application Number:
PCT/JP2020/041324
Publication Date:
May 20, 2021
Filing Date:
November 05, 2020
Export Citation:
Assignee:
UNIV SHIZUOKA NAT UNIV CORP (JP)
International Classes:
G02B5/20; H01L27/146
Domestic Patent References:
| WO2012026211A1 | 2012-03-01 |
Foreign References:
| JP2009239217A | 2009-10-15 | |||
| JP2018004694A | 2018-01-11 | |||
| JP2017040905A | 2017-02-23 | |||
| US20140071532A1 | 2014-03-13 | |||
| CN102798918A | 2012-11-28 | |||
| JP2020034899A | 2020-03-05 |
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