Optical filter

An optical filter comprising:

• a glass;
• a dielectric multilayer film 1 and a dielectric multilayer film 2 provided on both surface sides of the glass;
• a barrier film 1 provided between the glass and the dielectric multilayer film 1;
• a barrier film 2 provided between the glass and the dielectric multilayer film 2;
• and
• a light-absorbing layer provided on or above the dielectric multilayer film 2, wherein
• the glass is a phosphate glass having near-infrared ray absorbing properties and being substantially free from fluorine atoms, or a fluorophosphate glass having near-infrared ray absorbing properties and comprising a fluorine atom,
• the light-absorbing layer comprises a near-infrared ray absorbing dye having a maximum absorption wavelength at 680 nm to 800 nm,
• in a case where the glass is the phosphate glass, the barrier film 1 and the barrier film 2 each independently comprise one or more selected from TiO2, Nb2O5, Ta2O5, and HfO2,
• in a case where the glass is the fluorophosphate glass, the barrier film 1 and the barrier film 2 each independently comprise one or more selected from TiO2, Al2O3, Nb2O5, Ta2O5, and HfO2, and
• the optical filter satisfies all of the following spectral characteristics (i-1) to (i-3) and (i-6):
• (i-1) an average transmittance at a wavelength of 440 nm to 500 nm is 80% or more at an incident angle of 0 degrees and 70% or more at an incident angle of 60 degrees,
• (i-2) an average transmittance at a wavelength of 750 nm to 1,000 nm is 1% or less at an incident angle of 0 degrees and 1% or less at an incident angle of 60 degrees,
• (i-3) in a spectral transmittance curve at an incident angle of 0 degrees, a wavelength IR10(0deg) at which a transmittance is 10% is in a range of 600 nm to 700 nm, and
• (i-6) when a light is incident from a dielectric multilayer film 1 side, a maximum reflectance at a wavelength of 850 nm to 1,200 nm is 85% or more at an incident angle of 5 degrees.