Invention Grant
- Patent Title: Absorption type near infrared filter
-
Application No.: US17824904Application Date: 2022-05-26
-
Publication No.: US11971565B2Publication Date: 2024-04-30
- Inventor: Chung-Han Lu , Hsiao-Ching Shen , Chun-Cheng Hsieh , Ming-Zhan Wang
- Applicant: PTOT (SUZHOU) INC. , PLATINUM OPTICS TECHNOLOGY INC.
- Applicant Address: CN Suzhou
- Assignee: PTOT (SUZHOU) INC.,PLATINUM OPTICS TECHNOLOGY INC.
- Current Assignee: PTOT (SUZHOU) INC.,PLATINUM OPTICS TECHNOLOGY INC.
- Current Assignee Address: CN Suzhou; TW Taoyuan
- Priority: CN 1711371902.6 2017.12.19
- The original application number of the division: US16224728 2018.12.18
- Main IPC: G02B5/28
- IPC: G02B5/28 ; G01N21/359 ; G02B5/20 ; G02B5/22 ; G02B5/30

Abstract:
An absorption type near-infrared filter comprising a first multilayer film, a second multilayer film, and an absorption film, wherein in the ultraviolet band, the difference of between the wavelength with the transmittance at 80% of the absorbing film and the wavelength with the reflectivity at 80% of the first multilayer film falls in the range between 25 nm and 37 nm, the difference of between the wavelength with the transmittance at 50% of the absorbing film and the wavelength with the reflectivity at 50% of the first multilayer film falls in the range between 6 nm and 14 nm, and the difference of between the wavelength with the transmittance at 20% of the absorbing film and the wavelength with the reflectivity at 20% of the first multilayer film falls in the range between −6 nm and 2.5 nm.
Public/Granted literature
- US20220283347A1 ABSORPTION TYPE NEAR INFRARED FILTER Public/Granted day:2022-09-08
Information query