| 摘要 |
A near infrared light absorbing glass, element and filter that are environmentally friendly and have better uniformity and higher transmittance of visible light. When the thickness of the near infrared light absorbing glass is 1 mm, the transmittance at the wavelength of 400 nm is greater than 80%, and the transmittance at the wavelength of 500 nm is greater than 85%. The near infrared light absorbing glass contains cations P5+, Al3+, Li+, R2+ and Cu2+, R2+ representing Mg2+, Ca2+, Sr2+ and Ba2+, and contains anions O2- and F-. The water durability Dw of the near infrared light absorbing glass can reach Level 1, and the acid durability DA thereof is higher than Level 4. The near infrared light absorbing glass uses a high durability fluorophosphate glass as the matrix glass, and through a specific component design, the melting temperature of the glass can be effectively lowered, and desirable chemical stability of the glass can also be achieved. |
