Provided is a near-infrared-absorbing dye increasing a visible light transmittance and having a near-infrared blocking characteristic. The near-infrared-absorbing dye has an absorption characteristic measured by dissolving the dye in dichloromethane satisfying the following requirements. ⋅In an absorption spectrum at a wavelength of 400 to 800 nm, there is a maximum absorption wavelength λmax in a wavelength region of 670 nm or more. ⋅The following relational expression is established between a maximum absorption constant εA with respect to light with a wavelength of 430 to 550 nm and a maximum absorption constant εB with respect to light with a wavelength of 670 nm or more, where εB/εA≥65. ⋅In a spectral transmittance curve, an average transmittance of light with a wavelength of 430 to 460 nm is 94.0% or more when a transmittance at the maximum absorption wavelength λmax is set to 1%.
本发明提供了一种近红外吸收
染料,可增加可见光透射率并具有近红外阻断特性。这种近红外吸收
染料的吸收特性是通过将
染料溶解在
二氯甲烷中测得的,符合以下要求。⋅在波长为 400 至 800 纳米的吸收光谱中,最大吸收波长 λmax 在 670 纳米或以上的波长区域。⋅在波长为 430 至 550 nm 的光的最大吸收常数 εA 和波长为 670 nm 或以上的光的最大吸收常数 εB 之间建立了以下关系式,其中 εB/εA≥65.⋅ 在光谱透射率曲线中,当最大吸收波长 λmax 处的透射率设定为 1%时,波长为 430 至 460 nm 的光的平均透射率为 94.0% 或以上。