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. 25, 2022
Filed:
Sep. 18, 2020
Applicant:
E-vision Smart Optics, Inc., Sarasota, FL (US);
Inventors:
Anthony Van Heugten, Sarasota, FL (US);
Harry Milton, Sarasota, FL (US);
Assignee:
e-Vision Smart Optics, Inc., Sarasota, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C 7/08 (2006.01); G02F 1/29 (2006.01); G02B 3/08 (2006.01); G02C 7/04 (2006.01);
U.S. Cl.
CPC ...
G02C 7/083 (2013.01); G02B 3/08 (2013.01); G02C 7/04 (2013.01); G02F 1/29 (2013.01); G02C 2202/20 (2013.01); G02F 1/294 (2021.01);
Abstract
An electro-active lens is presented which utilizes a surface relief structures and an electro-active material, with a change in refractive index facilitating the change in optical properties. A molded structure and a liquid crystal are used to form a diffractive lens. In addition to the classical approach of utilizing diffractive optics and multiple Fresnel zones to form a lens, an additional structure is placed between Fresnel zones in order to improve the diffraction efficiency across the visible spectrum and reduce chromatic aberration.