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:
Jan. 13, 2026
Filed:
Dec. 20, 2021
Dispelix Oy, Espoo, FI;
Ismo Vartiainen, Espoo, FI;
Mikhail Erdmanis, Espoo, FI;
DISPELIX OY, , FI;
Abstract
A manufacturing method of a master template () of a grating of a diffractive optic element. A layer () of material () is deposited on a substrate () of the master template () through perforations () of a plate (), cross sectional areas of the perforations () depending on locations of the perforations () in the plate (), and the plate () and the substrate () being spaced at a non-zero distance (D) from each other. Height of the at least one layer () on the substrate () is caused to vary with variation of the areas of the perforations (). Raised formations () are formed on the substrate () by removing the at least one layer () from areas, which result in lowered formations () between the raised formations (). A fill factor and height of the raised formations () are made to be proportional with each other while the raised and lowered formations () have a relation with grooves () and ridges () of the grating (), the relation depending on the proportionality.