Optical filter and imaging apparatus

An optical filter comprising:

• a light-absorbing layer that includes a light absorber for absorbing light in at least a portion of the near-infrared region, wherein
• when light with a wavelength of 300 to 1200 nm is incident on the optical filter at an incident angle of 0°, the optical filter satisfies the following requirements (1) to (9):
• (1) a spectral transmittance at a wavelength of 380 nm is less than 20%, or less, and a wavelength at which a spectral transmittance is 20% in the wavelength range of 380 nm to 450 nm exceeds 400 nm;
• (2) the spectral transmittance at a wavelength of 450 nm is 75% or more;
• (3) an average of the spectral transmittance in the wavelength range of 500 to 600 nm is 80% or more;
• (4) the spectral transmittance at a wavelength of 700 nm is 5% or less;
• (5) the spectral transmittance at a wavelength of 715 nm is 3% or less;
• (6) an average of the spectral transmittance in the wavelength range of 700 to 800 nm is 1% or less;
• (7) the maximum of the spectral transmittance in the wavelength range of 750 to 1080 nm is 1% or less;
• (8) the maximum of the spectral transmittance in the wavelength range of 1000 to 1100 nm is 2% or less;
• and
• (9) a wavelength bandwidth of a wavelength band in which the spectral transmittance in the wavelength range of 400 to 700 nm is 75% or more is 170 nm or more,
• when light with a wavelength of 300 to 1200 nm is incident on the optical filter at incident angles of 0°, 30°, 35°, and 40°, the optical filter further satisfies the following requirements (10) to (18):
• (10) a normalized spectral transmittance at a wavelength of 380 nm is 24% or less;
• (11) the normalized spectral transmittance at a wavelength of 450 nm is 84% or more;
• (12) an average of the normalized spectral transmittance in the wavelength range of 500 to 600 nm is 95% or more;
• (13) the normalized spectral transmittance at a wavelength of 700 nm is 6.0% or less;
• (14) the normalized spectral transmittance at a wavelength of 715 nm is 4.5% or less;
• (15) an average of the normalized spectral transmittance in the wavelength range of 700 to 800 nm is 1.2% or less;
• (16) the maximum of the normalized spectral transmittance in the wavelength range of 750 to 1080 nm is 1.2% or less;
• (17) the maximum of the normalized spectral transmittance in the wavelength range of 1000 to 1100 nm is 2.4% or less;
• and
• (18) a wavelength bandwidth of a wavelength band in which the normalized spectral transmittance in the wavelength range of 400 to 700 nm is 80% or more is 170 nm or more,
• the normalized spectral transmittance being determined by normalization of the spectral transmittance for each incident angle so that the maximum of the spectral transmittance for each incident angle in the wavelength range of 400 to 650 nm is 100%.