Infrared cut filter, imaging device, and method for producing infrared cut filter
US10830931B2 · kind B2 · utility
1Cited by
1References
20Claims
0Family size
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Key dates
| Filing date | Jul 8, 2016 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Sep 2, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/208
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The infrared cut filter of the present invention includes an organic dye-containing layer and a copper phosphonate-containing layer containing fine particles of copper phosphonate. The organic dye-containing layer contains an organic dye so as to have a spectral transmittance that decreases from 70% or more to 50% or less with increasing wavelength in a wavelength range between a wavelength 50 nm shorter than a cut-off wavelength of the infrared cut filter and a wavelength 50 nm longer than the cut-off wavelength of the infrared cut filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.