The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2022
Filed:
May. 18, 2018
Applicant:
Dispelix Oy, Espoo, FI;
Inventors:
Jussi Rahomäki, Espoo, FI;
Ismo Vartiainen, Espoo, FI;
Assignee:
Dispelix Oy, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/18 (2006.01); B29D 11/00 (2006.01); G02B 27/01 (2006.01);
U.S. Cl.
CPC ...
G02B 5/1857 (2013.01); B29D 11/00769 (2013.01); G02B 5/1828 (2013.01); G02B 27/0172 (2013.01); G02B 2027/0178 (2013.01);
Abstract
The invention relates to a method of fabricating a master plate for producing diffractive structures and a master plate obtainable therewith. The method comprises providing a substrate having a periodic surface profile, filling the surface profile uniformly at least partly with filling material, and partially removing the filling material in order to produce a master plate having a periodic height-modulated surface profile formed by said substrate and said filling material. The invention allows for producing master plates capable of further producing gratings with variable diffraction efficiency.