| 摘要 |
<p>[Problem] To provide an optical filter having high visible light transmittance, and having, across a wide range of infrared wavelengths of 800 to 1200 nm, excellent light ray-cutting properties even against light rays with a high angle of incidence. [Solution] This optical filter has a transparent resin substrate and a near infrared reflecting film formed on at least one surface of the substrate, and satisfies conditions (A) and (B) below. (A) In a wavelength range of 430 to 580 nm, the average value of transmittance when measured perpendicular to the optical filter is at least 75%. (B) In a wavelength range of 800 to 1200 nm, the average value of reflectance when measured from one side of the optical filter at a 45° angle to the perpendicular of the optical filter is at least 70%.</p> |
