Optical filter

An optical filter comprising:

• a substrate;
• and
• a dielectric multilayer film laid on or above at least one major surface of the substrate, as an outermost layer, wherein:
• the substrate comprises a resin film containing a dye (U) having a maximum absorption wavelength in a range of 360 to 395 nm in dichloromethane, a dye (A) having a maximum absorption wavelength in a range of 600 to 800 nm in dichloromethane, and a resin;
• and
• the optical filter satisfies all of the following spectral characteristics (i-1) to (i-5):
• (i-1) an average transmittance T440-480 of a spectral transmittance curve in a wavelength range of 440 to 480 nm is 86% or more;
• (i-2) an absolute value of a difference between UV10(0deg) and UV10(50deg) is 3 nm or less, an absolute value of a difference between UV20(0deg) and UV20(50deg) is 4 nm or less, and an absolute value of a difference between UV50(0deg) and UV50(50deg) is 3 nm or less, where UV10(0deg), UV20(0deg), and UV50(0deg) represent wavelengths at which transmittances are 10%, 20%, and 50%, respectively, at an incident angle of 0° in a wavelength range of 350 to 450 nm, and UV10(50deg), UV20(50deg), and UV50(50deg) represent wavelengths at which transmittances are 10%, 20%, and 50%, respectively, at an incident angle of 50° in a wavelength range of 350 to 450 nm;
• (i-3) an average transmittance T400-440 of a spectral transmittance curve in a wavelength range of 400 to 440 nm is 40% or more;
• (i-4) an average transmittance T370-400(0deg) of a spectral transmittance curve at an incident angle of 0° in a wavelength range of 370 to 400 nm is 1% or less;
• and
• (i-5) an average transmittance T370-400(50deg) of a spectral transmittance curve at an incident angle of 50° in a wavelength range of 370 to 400 nm is 0.5% or less.