Optical filter, and imaging device comprising same
US10386555B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Aug 30, 2014 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Aug 30, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/223
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical filter satisfying Mathematical Formula 1 and an imaging device comprising the filter are provided. ΔE*≤1.5. [Mathematical Formula 1]In Mathematical Formula 1, ΔE* represents a color difference between light that has entered in the vertical direction of the optical filter and passed through the optical filter, and light that has entered in the direction at an angle of 30° to the vertical direction of the optical filter and passed through the optical filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.