WAVELENGTH-SELECTIVE TRANSPARENT GLASS PRODUCT
A wavelength-selective transmissive glass article has light transmittance T more than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less of 1% or more. In addition, the wavelength-selective transmissive glass article has light transmittance T 315 nm or less at a wavelength of 315 nm or less of 60% or less.
1 . A wavelength-selective transmissive glass article, which has light transmittance T more than 315 nm and 400 nm or less at a wavelength of more than 315 nm and 400 nm or less, represented by the following formula, of 1% or more and light transmittance T 315 nm or less at a wavelength of 315 nm or less, represented by the following formula, of 60% or less:
T more than 315 nm and 400 nm or less =(Σ k=more than 315 400 A k ×T k )/(Σ k=more than 315 400 A k )
T 315 nm or less =(Σ k=300 315 A k ×T k )/(Σ k=300 315 A k )
wherein A k is a weighting factor at a wavelength k (nm) for calculating T (light transmittance) specified in ISO-9050:2003, and T k is transmittance at a wavelength k (nm).
2 . The wavelength-selective transmissive glass article according to claim 1 , which is a glass article comprising a glass sheet and a film provided on a main surface of the glass sheet,
the glass article having:
light transmittance at a wavelength of 380 nm of 80% or more;
light transmittance at a wavelength of 350 nm of 30% or less; and
light transmittance at a wavelength of 315 nm of 10% or less.
3 . The wavelength-selective transmissive glass article according to claim 2 , wherein the glass article contains a component that emits light at a wavelength of 380 nm in at least one of the glass sheet and the film.
4 . The wavelength-selective transmissive glass article according to claim 2 , wherein the glass sheet has light transmittance at a wavelength of 360 nm of 50% or more.
5 . The wavelength-selective transmissive glass article according to claim 2 , wherein the film contains a component that absorbs light at a wavelength of 360 nm or less.
6 . The wavelength-selective transmissive glass article according to claim 2 , wherein the film contains a component that reflects light at a wavelength of 360 nm or less.
7 . The wavelength-selective transmissive glass article according to claim 1 , wherein the glass article is a laminated glass.
8 . A window glass that is the wavelength-selective transmissive glass article according to claim 1 .
9 . A cover glass that is the wavelength-selective transmissive glass article according to claim 1 .