TWI799634B
The present invention addresses the problem in providing an optical filter that can improve the detection accuracy of an ambient light sensor even if a system for authenticating biometric features and the ambient light sensor are arranged at close positions. The optical filter of the present inventi...
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| Zusammenfassung: | The present invention addresses the problem in providing an optical filter that can improve the detection accuracy of an ambient light sensor even if a system for authenticating biometric features and the ambient light sensor are arranged at close positions. The optical filter of the present invention has a substrate (i) and a light scattering layer formed on at least one surface of the substrate (i), and is characterized in that an OD value when measured at a wavelength of 940 nm from the direction perpendicular to the optical filter is 3 or more. |
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