Lead-free optical glasses with a hard flint position
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-003/16
C03C-003/12
C03C-003/21
C03C-003/062
출원번호
US-0687059
(2007-03-16)
등록번호
US-7501366
(2009-03-10)
우선권정보
DE-10 2006 013 599(2006-03-22)
발명자
/ 주소
Wolff,Silke
Hansen,Stefanie
Woelfel,Ute
출원인 / 주소
Schott Ag
대리인 / 주소
Striker,Michael J.
인용정보
피인용 횟수 :
8인용 특허 :
2
초록▼
Optical glasses are described, which are useful for imaging, sensors, microscopy, medical technology, digital protection, photolithography, laser technology, wafer/chip technology, as well as telecommunication, optical communications engineering and optics/lighting in the automotive sector, with a r
Optical glasses are described, which are useful for imaging, sensors, microscopy, medical technology, digital protection, photolithography, laser technology, wafer/chip technology, as well as telecommunication, optical communications engineering and optics/lighting in the automotive sector, with a refractive index of 1.80≦nd≦1.95 and an Abbe value from 19≦νd≦28 with excellent chemical resistance and stability to crystallization. These optical glasses have a composition, in weight. % based on oxide content, of: P2O5, 14-35; Nb2O5, 45-50; Li2O, 0-4; Na2O, 0-4; K2O, 0.5-5; BaO, 17-23; ZnO, 0.1-5; TiO2, 1-2, 0-6; and Sb2O3, 0.1-2.
대표청구항▼
We claim: 1. An optical glass that is free of boron constituents and has a composition, in wt. % based on oxide content, of: P2O5 14-35 Nb2O5 45-50 Li2O 0-4 Na2O 0-4 K2O 0.5-5 BaO 17-23 ZnO 0.1-5 TiO2 1- ZrO2 0-6 Sb2O3 ≧0.1. 2. The glass
We claim: 1. An optical glass that is free of boron constituents and has a composition, in wt. % based on oxide content, of: P2O5 14-35 Nb2O5 45-50 Li2O 0-4 Na2O 0-4 K2O 0.5-5 BaO 17-23 ZnO 0.1-5 TiO2 1- ZrO2 0-6 Sb2O3 ≧0.1. 2. The glass according to claim 1, which is contamination-free of amounts of SiO2, and/or contamination-free of residues of metallic crucible materials. 3. The glass according to claim 1, wherein a total amount of said TiO2 and said ZrO2 does not exceed 7 wt. % and/or a total amount of alkali metal oxides present does not exceed 8 wt. %. 4. The glass according to claim 1, containing up to 6 wt. % of aluminium oxide. 5. The glass according to claim 1, containing up to 5 wt. % of Ag2O. 6. The glass according to claim 1, containing at least one oxide ingredients selected from the group consisting of La2O3, Y2O3, Bi2O3, Gd2O3, GeO2, Ta2O5, Yb2O5 and WO3, and wherein a sum total amount of said one or more oxide ingredients does not exceed 5 wt. %. 7. The glass according to claim 1, containing one or more ingredients selected from the group consisting of MgO, CaO, SrO and F, and wherein a sum total amount of said one or more ingredients does not exceed 5 wt. %. 8. The glass according to claim 1, which is free of Pt and free of SiO2. 9. The glass according to claim 1, further comprising one or more of the following components as fining agents, in wt. %: As2O3 0-1 and/or SnO 0-1 and/or NaCl 0-1 and/or SO42- 0-1 and/or F- 0-1. 10. The glass according to claim 1, having a refractive index nd of 1.80≦nd≦1.95 and/or an Abbe number νd of 19≦νd≦28. 11. A method of producing a glass according to claim 1, said method comprising setting oxidizing conditions in a glass melt from which said glass is made. 12. An optical element, which is a lens, prism, light guide rod, array, optical fiber, gradient component, or an optical window, said optical element comprising a glass as defined in claim 1. 13. A method of producing an optical element, said method comprising pressing a glass as defined in claim 1 to form said optical element. 14. An optical part or an optical component for imaging, sensors, microscopy, medical technology, digital protection, telecommunication, optical communications engineering/information transmission, optics/lighting in the automotive sector, photolithography, steppers, excimer lasers, wafers, computer chips, as well as integrated circuits and electronic devices which contain such circuits and chips, said optical part or component comprising a glass as defined in claim 1.
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