公开(公告)号：US20240427067A1

公开(公告)日：2024-12-26

申请号：US18743919

申请日：2024-06-14

Applicant: PLATINUM OPTICS TECHNOLOGY INC.

Inventor： Shih-Song Cheng ,  Bo-Xun Zhu ,  Jia-Cheng Chang ,  Kuan-Yu Chen ,  Hung-Han Duan ,  Shi-Lin Zhang ,  Bo-En Zhu

IPC: G02B5/20 ,  G02B1/113 ,  G02B1/14

Abstract: Provided is a filter, including a substrate layer and a near-infrared absorption layer on the substrate layer, wherein the near-infrared absorption layer includes a copper complex formed from a copper compound for supplying copper ion, phosphonric acid represented by formula 1 herein, and at least one phosphorus-containing compound represented by formulas 2 to 4 herein, wherein the OD value of the filter for the incident light wavelength from 930-950 nm is greater than 4. In the present disclosure, by setting a specific near-infrared absorption layer on the filter, the filter is able to efficiently absorb near-infrared and exhibit excellent visible light transmittance, and the burden of film post-processing can be reduced.