Near infrared cutoff filter glass

1. A near infrared cutoff filter glass, which comprises, as represented by cation percentage:

P 5+ 30 to 50%,

Al 3+ 5 to 20%,

R + 20 to 40% where R + is a total amount of Li + +Na + +K + ,

R′ 2+ 5 to 30% where R′ 2+ is a total amount of Mg 2+ +Ca 2+ +Sr 2+ +Ba 2+ +Zn 2+ ,

Cu 2+ 3 to 15%

and comprises, as represented by anion percentage:

O 2− 30 to 90% and

F − 10 to 70%,

wherein (Li + +Na + +K + )/(P 5+ +Al 3+ ) is from 0.58 to 0.73, and (Sr 2+ +Ba 2+ +Cu 2+ )/(Al 3+ +Mg 2+ +Ca 2+ ) is from 0.5 to 1.0,

wherein the near infrared cutoff filter glass does not comprise Ce 4+ and Sb 3+ .

2. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by cation percentage, 0.1 to 30% of K + .

3. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by cation percentage, 20 to 30% of K + .

4. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by cation percentage, 1 to 30% of Zn 2+ .

5. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by anion percentage, 76.7 to 90% of O 2− .

6. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by anion percentage, 77.2 to 90% of O 2− .

7. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by anion percentage, 10 to 23.3% of F − .

8. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by anion percentage, 10 to 22.8% of F − .

9. The near infrared cutoff filter glass according to claim 1 , which does not comprise at least one member selected from the group consisting of Mg and S.

10. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by cation percentage:

P 5+ 30 to 48%,

Al 3+ 6 to 18%,

R + 20 to 38% where R + is the total amount of Li + +Na + +K + ,

R′ 2+ 5 to 28% where R′ 2+ is the total amount of Mg 2+ +Ca 2+ +Sr 2+ +Ba 2+ +Zn 2+ ,

Cu 2+ 3.2 to 12%

and comprises, as represented by anion percentage:

O 2− 30 to 80% and

F − 10 to 50%.

11. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by cation percentage:

P 5+ 34 to 44%,

Al 3+ 7 to 13%,

R + 24 to 36% where R + is the total amount of Li + +Na + +K + ,

R′ 2+ 10 to 20% where R′ 2+ is the total amount of Mg 2+ +Ca 2+ +Sr 2+ +Ba 2+ +Zn 2+ ,

Cu 2+ 3.4 to 9%

and comprises, as represented by anion percentage:

O 2− 30 to 75% and

F − 15 to 40%.

12. The near infrared cutoff filter glass according to claim 1 , which comprises, as represented by cation percentage:

P 5+ 36.8 to 42.1%,

Al 3+ 8 to 12.2%,

R + 29.5 to 35% where R + is the total amount of Li + +Na + +K + ,

R′ 2+ 11.3 to 14.1% where R′ 2+ is the total amount of Mg 2+ +Ca 2+ +Sr 2+ +Ba 2+ +Zn 2+ , and

Cu 2+ 4 to 9.2%.

13. The near infrared cutoff filter glass according to claim 1 , wherein in a plate thickness of from 0.05 to 0.25 mm, the wavelength at which the transmittance becomes 50% is from 600 nm to 650 nm, and the transmittance at a wavelength of 400 nm is at least 70%.

14. The near infrared cutoff filter glass according to claim 1 , wherein, in a plate thickness of from 0.05 to 0.25 mm, the transmittance at a wavelength of 400 nm is at least 84.4%.

15. The near infrared cutoff filter glass according to claim 1 , wherein in a plate thickness of from 0.05 to 0.25 mm, the transmittance at a wavelength of 400 nm is at least 85%.

16. The near infrared cutoff filter glass according to claim 1 ,

wherein

in a plate thickness of from 0.05 to 0.25 mm, the transmittance at a wavelength of 400 nm is from 85% to 89.4%.