Invention Application
- Patent Title: ABSORPTION TYPE NEAR INFRARED FILTER
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Application No.: US17824904Application Date: 2022-05-26
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Publication No.: US20220283347A1Publication Date: 2022-09-08
- 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; TW Taoyuan City
- Assignee: PTOT (SUZHOU) INC.,PLATINUM OPTICS TECHNOLOGY INC.
- Current Assignee: PTOT (SUZHOU) INC.,PLATINUM OPTICS TECHNOLOGY INC.
- Current Assignee Address: CN Suzhou; TW Taoyuan City
- Priority: CN201711371902.6 20171219
- Main IPC: G02B5/28
- IPC: G02B5/28 ; G01N21/359 ; G02B5/20 ; G02B5/22

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
- US11971565B2 Absorption type near infrared filter Public/Granted day:2024-04-30
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