Patent · US Active

Optical filter

US12422602B2 · kind B2 · utility

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13Claims
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Key dates

Filing dateApr 20, 2023
Grant dateSep 23, 2025
Priority date
Expiry dateMay 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.