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:
Dec. 07, 2021
Filed:
May. 18, 2018
Dispelix Oy, Espoo, FI;
Dispelix Oy, Espoo, FI;
Abstract
The invention relates to a method of manufacturing a diffractive grating. The method comprises providing a first substrate and manufacturing onto the first substrate a first surface profile using temporary grating material. Next, the first surface profile is covered entirely by a layer of final grating material and a second substrate is bonded onto the final grating material. Finally, the first substrate and the temporary grating material are removed for producing on the final grating material a second surface profile, which is a negative of the first surface profile. The invention allows for conveniently producing high quality gratings using e.g. inorganic materials and height and/or fill factor modulation for diffraction efficiency control.