Optical filter, and imaging device comprising same
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United States of America Patent
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Jun 2, 2020
Grant Date -
Sep 8, 2016
app pub date -
Aug 30, 2014
filing date -
Sep 6, 2013
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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:
- wherein the ΔE* value represents a color difference between light that is incident in a vertical direction of the optical filter and passes through the optical filter and light that is incident at an angle of 30° with respect to the vertical direction of the optical filter and passes through the optical filter.
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