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:
Nov. 28, 2023
Filed:
Mar. 12, 2019
Xinyang Sunny Optics Co., Ltd., Xinyang, CN;
Ce Chen, Xinyang, CN;
Weihong Ding, Xinyang, CN;
Niangong Xiao, Xinyang, CN;
Jili Chen, Xinyang, CN;
XINYANG SUNNY OPTICS CO., LTD., Xinyang, CN;
Abstract
The present disclosure relates to an optical filter and an infrared image sensing system including the optical filter. The optical filter includes a glass substrate, and an IR film layer and an AR film layer plated on two opposite surfaces of the glass substrate; the IR film layer includes a first refractive-index-material layer, a second refractive-index-material layer, and a third refractive-index-material layer; the refractive index of the third refractive-index-material layer is greater than the refractive index of the first refractive-index-material layer, and the refractive index of the second refractive-index-material layer is greater than the refractive index of the third refractive-index-material layer. The optical filter of the present disclosure has a good anti-reflection effect on near-infrared light so that a high accuracy of face recognition and gesture recognition is ensured.