Optical element comprising mix of NIR dyes for broader NIR cut and better aesthetic
US12196989B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Mar 23, 2020 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Dec 14, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/108
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed are optical elements that contains two or more near infrared absorbers and methods of producing the same. Two near infrared absorbers with different near infrared wavelengths absorption ranges and residual colors are mixed with a precursor of an optical substrate. The resulting mixture is subsequently processed to produce optical elements that have a broad near infrared wavelength absorption range and a neutral residual color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.