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:
Sep. 08, 2020
Filed:
Jun. 30, 2017
Lumentum Operations Llc, Milpitas, CA (US);
John Michael Miller, Gatineau, CA;
Hery Djie, San Jose, CA (US);
Patrick Lu, Mountain View, CA (US);
Xiaowei Guo, Pleasanton, CA (US);
Qinghong Du, Fremont, CA (US);
Eddie Chiu, Pleasanton, CA (US);
Chester Murley, Manotick, CA;
Lumentum Operations LLC, Milpitas, CA (US);
Abstract
A reflective diffraction grating and a fabrication method are provided. The reflective diffraction grating includes a substrate, a UV-absorbing layer, a grating layer having a binary surface-relief pattern formed therein, and a conforming reflective layer. Advantageously, the UV-absorbing layer absorbs light at a UV recording wavelength to minimize reflection thereof by the substrate during holographic patterning at the UV recording wavelength.