Optical filter
US12422602B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Apr 20, 2023 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | May 1, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical filter including: a substrate; and a dielectric multilayer film laid on or above at least one major surface of the substrate as an outermost layer, in which the substrate includes a resin film including a dye (IR) and a resin, the dye (IR) has a maximum absorption wavelength in a wavelength of 680 to 800 nm in the resin, and the optical filter satisfies specific spectroscopic characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.