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US 2023/0066022 A1Published application
Near-infrared absorbing glass and near-infrared cut-off filter
AssigneePlatinum Optics Technology Inc.
InventorsChung-Han Lu, Che-Yu Chen, Ming-Jui Yang
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Abstract
A near-infrared absorbing glass is provided and includes 10% to 40% by weight of phosphorus and 5% to 35% by weight of iron, where a molar ratio of phosphorus to iron (P/Fe) of the near-infrared absorbing glass is between 1.75 and 5, and the near-infrared absorbing glass has an average transmittance of less than 10% to light with wavelengths ranging from 930 nm to 950 nm. A near-infrared cut-off filter including the near-infrared absorbing glass is also provided.
Claims20
A near-infrared absorbing glass, comprising:
- 10% to 40% by weight of phosphorus;
- and
- 5% to 35% by weight of iron,
- wherein a molar ratio of the phosphorus to the iron of the near-infrared absorbing glass is between 1.75 and 5, and an average transmittance of the near-infrared absorbing glass to light with wavelengths ranging from 930 nm to 950 nm is less than 10%.
1 more element
Dependencies are inferred from the claim text.