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:
Feb. 16, 2021
Filed:
Feb. 22, 2019
Alexander Yuri Usenko, Lake Saint Louis, MO (US);
Alexander Yuri Usenko, Lake Saint Louis, MO (US);
Other;
Abstract
A process for preparing a surface of an optical article to improve light reflection and light transmission properties while conserving mechanical properties as durability and scratch resistance of the surface. A blank film is deposited on a base article. The film is post processed to convert a flat surface into near close packed array of near hemispherical protuberances. The conversion done in 2 steps. First the film is scratched to honeycomb pattern. Second the article is annealed. The anneal causes sequential transformation of flat film into the array. The transformation starts from scratch lines and go to a center of each honeycomb island cell. It is driven by dewetting phenomena. Characteristic size of the protuberances is controlled by initial film thickness. For low reflectivity of visible light, the initial blanket film is near 150 nm thick.