Optical camouflage filters
US11054556B2 · kind B2 · utility
3Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2017 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | May 11, 2037 |
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.