Patent ID: 11971565
Assignee: PLATINUM OPTICS TECHNOLOGY INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The absorption type near-infrared filter according to claim 1, wherein in the ultraviolet band, the difference between the wavelength with the transmittance at of the absorption film and the wavelength with the reflectivity at 80% of the first multilayer film ranges between 23 nm and 40 nm; the difference between the wavelength with the transmittance at 50% of the absorption film 11 and the wavelength with the reflectivity at 50% of the first multilayer film 10 ranges between 3 nm and 14 nm; the difference between the wavelength with the transmittance at 20% of the absorption film 11 and the wavelength with the reflectivity at 20% of the first multilayer film 10 ranges between −15 nm and 2.5 nm.