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:
May. 28, 2019
Filed:
Sep. 22, 2016
Apple Inc., Cupertino, CA (US);
Hannah D. Noble, Sunnyvale, CA (US);
Kevin A. Sawyer, Cupertino, CA (US);
Martin B. Adamcyk, Burlingame, CA (US);
Yazan Z. Alnahhas, Mountain View, CA (US);
Yu Qiao Qu, Portola Valley, CA (US);
Moshe Kriman, Tel Aviv, IL;
Adar Magen, Herzliya Pituach, IL;
APPLE INC., Cupertino, CA (US);
Abstract
An optical module includes first and second transparent substrates and a spacer between the first and second transparent substrates, holding the first transparent substrate in proximity to the second transparent substrate, with first and second diffractive optical elements (DOEs) on respective faces of the first and second transparent substrates. At least first and second capacitance electrodes are disposed respectively on the first and second transparent substrates in proximity to the first and second DOEs. Circuitry is coupled to measure changes in a capacitance between at least the first and second capacitance electrodes.