Optical material and use thereof

1. An optical material in which a transmittance curve measured at a thickness of 2 mm thereof satisfies the following characteristics (1) to (4),

wherein (1) the transmittance curve has a local maximum transmittance value in a wavelength range of 400 nm to 440 nm and the maximum transmittance thereof is 50% or more,

wherein (2) the transmittance curve has a minimum transmittance value in a wavelength range of 445 nm to 470 nm,

wherein (3) the transmittance at a wavelength of 500 nm is 70% or more, and

wherein (4) the minimum transmittance value in the wavelength range of 445 nm to 470 nm is four-fifths or less of the transmittance at a wavelength of 500 nm,

wherein the optical material comprises a polythiourethane and organic dyes,

wherein the organic dyes are comprised of at least two selected from porphyrin-based compounds represented by the General Formula (A):

wherein all of X 1 to X 8 represent bromine atoms; R 1 to R 4 each independently represents a hydrogen atom, and a straight or branched alkyl group; and M represents two hydrogen atoms, a divalent metal atom, a trivalent substituted metal atom, a tetravalent substituted metal atom, a hydroxylated metal atom, or an oxidized metal atom, and

wherein the amount of the organic dyes is 5 ppm to 100 ppm.

2. The optical material according to claim 1 , comprising:

at least one kind of organic dyes which have an absorption peak in a wavelength range of 445 nm to 470 nm, in an absorption spectrum which is measured at an optical path length of 10 mm of a chloroform solution thereof at a concentration of 0.01 g/L, and the half-value width of the absorption peak is 10 nm or more and less than 50 nm.

3. The optical material according to claim 1 , comprising:

organic dyes which have an absorption peak in a wavelength range of 445 nm to 455 nm and organic dyes which have an absorption peak in a wavelength range of 460 nm to 470 nm, in an absorption spectrum which is measured at an optical path length of 10 mm of a chloroform solution thereof at a concentration of 0.01 g/L.

4. The optical material according to claim 1 , the optical material has a minimum transmittance value in a wavelength range of 455 nm to 465 nm.

5. The optical material according to claim 1 ,

wherein the organic dyes have an absorption peak in a wavelength range of 445 nm to 470 nm, in an absorption spectrum which is measured at an optical path length of 10 mm of a chloroform solution thereof at a concentration of 0.01 g/L.

6. A plastic spectacle lens comprised of the optical material according to claim 1 .

7. A plastic spectacle lens, comprising:

a lens base material comprised of the optical material according to claim 1 .