Title:
光学フィルタ及び当該光学フィルタを含む赤外線画像センシングシステム
Document Type and Number:
Japanese Patent JP6979730
Kind Code:
B2
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. In addition, adhesion of the film layers of the optical filter can be improved at the same time of enabling the thickness of film layers of the optical filter of the present disclosure to be thinner.
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Inventors:
Policy
Ding Wei Hong
Xiao dynasty
Chen Giri
Ding Wei Hong
Xiao dynasty
Chen Giri
Application Number:
JP2020537281A
Publication Date:
December 15, 2021
Filing Date:
March 12, 2019
Export Citation:
Assignee:
Xinyang Shunyu Optical Co., Ltd.
International Classes:
G02B5/28; B32B7/023; B32B17/06
Foreign References:
| WO2014104370A1 | ||||
| WO2018043500A1 | ||||
| WO2011033984A1 |
Attorney, Agent or Firm:
Goto Patent Office
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