| CPC G03B 11/00 (2013.01) [G02B 1/10 (2013.01); G02B 5/208 (2013.01); G02B 5/281 (2013.01); G02B 7/006 (2013.01); G02B 7/09 (2013.01); G02B 15/14 (2013.01); G03B 13/36 (2013.01); G03B 17/12 (2013.01); H04N 23/11 (2023.01)] | 19 Claims |
|
1. An imaging lens comprising:
a plurality of lenses; and
a coating provided on at least a part of the plurality of lenses,
wherein in a near-infrared light wavelength region, by the coating, light transmittance on a short wavelength side of a near-infrared light peak wavelength region including 1550 nm is reduced from light transmittance at a short wavelength end of the near-infrared light peak wavelength region as a wavelength is decreased, and light transmittance on a long wavelength side of the near-infrared light peak wavelength region is reduced from light transmittance at a long wavelength end of the near-infrared light peak wavelength region as the wavelength is increased,
light transmittance in the near-infrared light peak wavelength region is greater than or equal to 60%, and
in a visible light wavelength region, by the coating, light transmittance on a short wavelength side of a visible light peak wavelength region including a range of 500 nm to 650 nm is reduced from light transmittance at a short wavelength end of the visible light peak wavelength region as the wavelength is decreased, and light transmittance on a long wavelength side of the visible light peak wavelength region is reduced from light transmittance at a long wavelength end of the visible light peak wavelength region as the wavelength is increased.
|