Loading patent…
AssigneeXinyang Sunny Optics Co., Ltd.
InventorsCe CHEN, Weihong DING, Niangong XIAO, JiIi CHEN
Estimating the term…
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.
An optical filter, comprising:
The optical filter according to 4, wherein a physical thickness of the second refractive-index-material layer and a physical thickness of the first refractive-index-material layer satisfy a relationship:
The optical filter according to 5, wherein a physical thickness of the second refractive-index-material layer and a physical thickness of the first refractive-index-material layer satisfy a relationship:
The optical filter according to 6, wherein a physical thickness of the second refractive-index-material layer and a physical thickness of the first refractive-index-material layer satisfy a relationship:
Dependencies are inferred from the claim text.