| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass which has high transmittance in the visible region even when it contains CuO in high concentration while maintaining high strength. SOLUTION: The glass for a near infrared absorption filter contains P<SB>2</SB>O<SB>5</SB>of 63-73%, Al<SB>2</SB>O<SB>3</SB>of 15-22%, and P<SB>2</SB>O<SB>5</SB>+Al<SB>2</SB>O<SB>3</SB>of 80% or more, B<SB>2</SB>O<SB>3</SB>of 0-10%, SiO<SB>2</SB>of 0-10%, Li<SB>2</SB>O of 0-5%, Na<SB>2</SB>O of 0-8%, Li<SB>2</SB>O+Na<SB>2</SB>O of 0.5-10%, and MgO of 0-6% in terms of mol%, and CuO, wherein Vickers hardness is 570 or more, a Young's modulus is 80 GPa or more, transmittance with thickness of 0.5 mm at a wavelength of 400 nm is 70% or more, and transmittance at a wavelength of 800 nm is 2% or less. COPYRIGHT: (C)2010,JPO&INPIT
|
