Near-infrared cut filter and device including near-infrared cut filter
AssigneeJsr Corporation
InventorTakashi Tsubouchi
Life of this patent
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Abstract
The present invention provides a near-infrared cut filter comprises a resin substrate (I) which comprises a resin and a light absorber (A) having a structure derived from a compound represented by the following Formula (I), wherein the light absorber (A) is contained in the resin substrate (I) in an amount of 0.001 to 0.01 parts by weight with respect to 100 parts by weight of the resin.
Claims14
A near-infrared cut filter, comprising a resin substrate (I) which comprises a resin and a light absorber (A) having a structure derived from a compound represented by the following Formula (I),
- wherein said light absorber (A) is contained in said resin substrate (I) in an amount of 0.001 to 0.01 parts by weight with respect to 100 parts by weight of said resin:
- [wherein, Ra, Rb and Y satisfy the following (i) or (ii):
- (i) Ras independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a —NReRf group (wherein, Re and Rf each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms) or a hydroxy group;
- Rbs independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a —NRgRh group (wherein, Rg and Rh each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or a —C(O)Ri group (wherein, Ri represents an alkyl group having 1 to 5 carbon atoms)) or a hydroxy group;
- and
- Ys independently represent a —NRjRk group (wherein, Rj and Rk each independently represent a hydrogen atom, an aliphatic hydrocarbon group having 1 to 8 carbon atoms, a substituted aliphatic hydrocarbon group having 1 to 8 carbon atoms in which an arbitrary hydrogen atom is substituted with a substituent, an aromatic hydrocarbon group having 6 to 12 carbon atoms or a substituted aromatic hydrocarbon group having 6 to 12 carbon atoms in which an arbitrary hydrogen atom is substituted with an alkyl group), or
- (ii) one of two Ras on one benzene ring and Y on the same benzene ring bind with each other to form a heterocycle which is constituted by 5 or 6 atoms and contains at least one nitrogen atom;
- and
- Rbs and Ras not involved in said binding each independently have the same meaning as in said (i)].
A near-infrared cut filter, comprising a resin substrate (I′), which comprises a light absorber and a resin, and having transmittance satisfying the following (A) to (D):
- (A) in a wavelength range of 430 to 580 nm, the average transmittance measured in the vertical direction of said near-infrared cut filter is 80% or higher;
- (B) in a wavelength range of 630 to 650 nm, the average transmittance measured in the vertical direction of said near-infrared cut filter is 70% or higher;
- (C) in a wavelength range of 800 to 1,000 nm, the average transmittance measured in the vertical direction of said near-infrared cut filter is 20% or lower;
- and
- (D) in a wavelength range of 550 to 700 nm, the absolute value of the difference between the value of the wavelength at which the transmittance measured in the vertical direction of said near-infrared cut filter is 75% (Ya) and the value of the wavelength at which the transmittance measured at an angle of 30° with respect to the vertical direction of said near-infrared cut filter is 75% (Yb) is less than 15 nm.
Dependencies are inferred from the claim text.