An optical glass for the manufacture of large transmission optics, such as lenses having a thickness of 100 millimeters or more, comprises 35 to 70 wt.-% SiO2, 17 to 35 wt.-% Al2O3, 3 to 17 wt.-% P2O5, 0 to 6 wt.-% Li2O, 0.5 to 4 wt.-% MgO, 0.5 to 3 wt.-% ZnO, a maximum of 1 wt.-% CaO, a maximum of
An optical glass for the manufacture of large transmission optics, such as lenses having a thickness of 100 millimeters or more, comprises 35 to 70 wt.-% SiO2, 17 to 35 wt.-% Al2O3, 3 to 17 wt.-% P2O5, 0 to 6 wt.-% Li2O, 0.5 to 4 wt.-% MgO, 0.5 to 3 wt.-% ZnO, a maximum of 1 wt.-% CaO, a maximum of 0.5 wt.-% BaO, 0.5 to 6 wt.-% TiO2, 0.5 to 3 wt.-% ZrO2, 0 to 1 wt.-% Na2O, 0 to 1 wt.-% K2O, a maximum of 1 wt.-% of refining agents (As2O3, SP2O3) and a maximum of 500 ppm of other contaminants. The glass composition may be equal to the composition of the glass ceramic Zerodur® and allows to manufacture large transmission optics in a cost-effective way, has a maximum of transmittance which is in the range of a He—Ne lasers and has a CTE of about 3·10−6/K.
대표청구항▼
What is claimed is: 1. A transmissive optical component comprising an optical glass comprising (in wt.-%): SiO2 35-75 Al2O3 17-35 B2O3 0-5 P2O5 1-17 SnO2 + ZrO2 + TiO2 0.1-8 Na2O + K2O + Cs2O + Li2O 0.1-8 CaO + MgO + SrO + Ba
What is claimed is: 1. A transmissive optical component comprising an optical glass comprising (in wt.-%): SiO2 35-75 Al2O3 17-35 B2O3 0-5 P2O5 1-17 SnO2 + ZrO2 + TiO2 0.1-8 Na2O + K2O + Cs2O + Li2O 0.1-8 CaO + MgO + SrO + BaO + ZnO 0.1-8 Refining agents: ≦1 coloring oxides and ≦1; other impurities: said optically transmissive component having a coefficient of thermal expansion in the range between 0° C. and 50° C. being 4.1·10−6/K at the most. 2. The component of claim 1, wherein said optical glass comprises (in wt.-%): SiO2 35-70 Al2O3 17-35 P2O5 3-17 Li2O 2-6 MgO 0.5-4 ZnO 0.5-3 CaO ≦1 BaO ≦0.5 TiO2 0.1-6 ZrO2 0.1-3 Na2O 0-1 K2O 0-1 As2O3 ≦1 Sb2O3 ≦1 other ≦0.5. impurities 3. The component of claim 1, wherein said optical glass comprises (in wt.-%): SiO2 50-60 Al2O3 20-30 P2O5 3-12 Li2O 3-4 MgO 0.5-2.5 ZnO 0.5-3 CaO <1 BaO <0.5 TiO2 1.5-3.5 ZrO2 1-2.5 Na2O 0-1 K2O 0-1 As2O3 + Sb2O3 ≦1 other ≦0.2; impurities wherein the component has a true transmittance in the wavelength range between 500 and 750 nanometers which is at least 0.55 for a test body of a length of 100 millimeters. 4. The component of claim 1, wherein said optical glass comprises a maximum of 500 ppm of any element selected from the group consisting of coloring agents, noble metals and halogenides. 5. The component of claim 1, wherein said optical glass comprises a maximum of 500 ppm of any element selected from the group consisting of Fe2O3, PbO, Pt, Rh, Cl−, and F−. 6. The component of claim 1, wherein said optical glass comprises a maximum of 120 ppm of Fe2O3. 7. The component of claim 1, wherein said optical glass comprises a maximum of 80 ppm of Fe2O3. 8. The component of claim 1, having a coefficient of thermal expansion in the range between 0° C. and 50° C. being 3.5·10−6/K at the most. 9. The component of claim 1, having a coefficient of thermal expansion in the range between 0° C. and 50° C. being about 3·10−6/K. 10. The component of claim 1, having a refractive index nd in the range of 1.42≦nd≦1.63. 11. The component of claim 1, having a refractive index nd in the range of 1.47≦nd≦1.58. 12. The component of claim 1, having an Abbe coefficient νd in the range of 53≦νd≦63. 13. The component of claim 1, having an Abbe coefficient νd in the range of 57.1≦νd≦59.1. 14. The component of claim 1, having a true transmittance in the wavelength range between 500 and 750 nanometers which is at least 0.55 for a test body of a length of 100 millimeters. 15. The component of claim 1, having a true transmittance in the wavelength range between 550 and 750 nanometers which is at least 0.7 for a test body of a length of 100 millimeters. 16. The component of claim 1, having a true transmittance in the wavelength range between 600 und 750 nanometers which is at least 0.8 for a test body of a length of 100 millimeters. 17. The component of claim 1, having a true transmittance comprising a maximum that is in the wavelength range between 600 and 750 nanometers. 18. The component of claim 1, having a thickness of at least 50 millimeters. 19. The component of claim 1, having a thickness of at least 100 millimeters. 20. The component of claim 1, having a lateral extension of at least 0.5 meters. 21. The component of claim 1, having a lateral extension of at least 1 meter. 22. The component of claim 1, which is part of a test optic for an aspheric mirror telescope. 23. The component of claim 1, being configured as a component selected from the group consisting of a lens and a prism. 24. The component of claim 1, being configured as a component selected from the group consisting of a lens and a prism and further having a maximum thickness of at least 50 millimeters and a maximum lateral extension of at least 0.5 meters.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Marker Alexander J. (Moscow PA), Cladding glass ceramic for use in high powered lasers.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.