OPTICAL FILTER AND IMAGING DEVICE

The present invention pertains to an optical filter comprising: an absorption layer containing a near-infrared-absorbing pigment and a transparent resin; and a reflection layer, wherein the transparent resin has a maximum absorption wavelength of 760-900 nm, an average transmittance T435-480aveTR at...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HOTAKA HIROKI, SHIONO KAZUHIKO, HIGASHITAMORI SAYURI, SUZUKI SHOKO
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The present invention pertains to an optical filter comprising: an absorption layer containing a near-infrared-absorbing pigment and a transparent resin; and a reflection layer, wherein the transparent resin has a maximum absorption wavelength of 760-900 nm, an average transmittance T435-480aveTR at 435-480 nm of at least 90%, and an average transmittance T480-590aveTR at 480-590 nm of at least 90%, the dichloromethane has a maximum absorption wavelength of 760-900 nm, an average transmittance T435-480aveDCM at 435-480 nm of at least 95%, and an average transmittance T480-590aveDCM at 480-590nm of at least 97%, the difference between T435-480aveDCM and T435-480aveTR is 10.5% or less, the difference between T480-590aveDCM and T480-590aveTR is 10.5% or less, and the average transmittance ofthe optical filter at 800-900 nm and an incident angle of 60 degrees is 5% or less. 本发明涉及一种滤光片,所述滤光片具有吸收层和反射层,所述吸收层含有近红外线吸收色素和透明树脂,其中,所述近红外线吸收色素在透明树脂中的最大吸收波长为760nm~900nm、并且435nm~480nm的平均透射率T、480nm~590nm的平均透射率T为90%以上,所述近红外线吸收色