Optical filter, and solid-state image pickup device and camera module using the optical filter

An optical filter comprising:

• a resin substrate which comprises a resin and a near-infrared absorbing dye;
• and
• a near-infrared reflecting film,
• wherein the near-infrared absorbing dye comprises a squarylium-based compound (A) and at least one compound (B) selected from the group consisting of a phthalocyanine-based compound (B-1) and a cyanine-based compound (B-2),
• wherein the absorption maximum of the squarylium-based compound (A) is present on the side of shorter wavelength than the absorption maximum of the at least one compound (B),
• wherein the squarylium-based compound (A) has the absorption maximum in the wavelength region of not less than 650 nm but less than 740 nm, and the at least one compound (B) has the absorption maximum in the wavelength region of more than 670 nm but not more than 760 nm, and the difference in the absorption maximum wavelength between the squarylium-based compound (A) and the at least one compound (B) is from 10 to 60 nm, and
• wherein an average transmittance of the optical filter in a wavelength region of from 430 nm to 580 nm is at least 87%, and an average transmittance of the optical filter in a wavelength region of from 800 nm to 1000 nm is at most 1%.