Patent ID: 9268072
Filing Date: 2016-02-23
CPC Classification: C09B,G02B,H01L

Claim Text:
1. An optical filter comprising: a near infrared ray absorbing layer which comprises: a selective wavelength shielding layer provided on one side or both sides of the near infrared ray absorbing layer, the selective wavelength shielding layer transmitting visible light of from 420 to 695 nm therethrough and shielding light in a wavelength range of from 720 to 1,100 nm, wherein the near infrared ray absorbing dye (A) comprises a near infrared ray absorbing dye (A1), an absorption spectrum of the near infrared ray absorbing dye (A1) in a wavelength range of from 400 to 1,000 nm having a maximum absorption peak at a peak wavelength, wherein the absorption spectrum is measured in a state in which the near infrared ray absorbing dye (A1) is dissolved in a solvent for dye having a refractive index (n the absorption spectrum of the near infrared ray absorbing dye (A1) satisfies conditions (a) to (c): (a) the peak wavelength is in a range of from 695 to 720 nm; (b) a full width at half maximum of the maximum absorption peak is not more than 60 nm; and (c) when calculated with an absorbance at the peak wavelength being 1, a value obtained by dividing a difference between an absorbance at 630 nm and an absorbance at the maximum absorption peak by a wavelength difference between 630 nm and the peak wavelength (nm) is from 0.010 to 0.050; the transparent resin (B) has a refractive index (n the near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength range of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance (D) expressed by equation (1) of not more than −0.8: wherein in the equation (1), T