Optical filter, and imaging device comprising same
US10670785B2 · kind B2 · utility
2Cited by
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7Claims
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Key dates
| Filing date | Aug 30, 2014 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Oct 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/223
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical filter comprising a light absorption layer and a near-infrared reflection layer, and an imaging device comprising the optical filter are provided. Wherein the light absorption layer has an absorption maximum in a wavelength range of 670 to 720 nm, a wavelength at which the near-infrared reflection layer has a light transmittance of 50% is in a range of 690 to 720 nm, and the optical filter satisfies the following Mathematical Formula 1: ΔE*≤1.5 [Mathematical Formula 1]
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.