Optical camouflage filters
US12216298B2 · kind B2 · utility
0Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2021 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | Dec 7, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An article includes an optical filter that comprises a wavelength selective reflective layer and at least one wavelength selective absorbing layer. The optical filter has visible transmittance between 400 nm-700 nm of less than about 30% and near infrared transmittance at 830 nm-900 nm greater than about 30%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.