METHOD FOR PRODUCING AN OPTICAL GLASS PART, PARTICULARLY OF A MOTOR VEHICLE HEADLIGHT LENS
The invention relates to a method for producing an optical glass part, particularly of a motor vehicle headlight lens or a lens-like free form for a motor vehicle headlight, wherein glass is melted, wherein a perform is formed from the glass, and wherein from the perform the motor vehicle headlight lens or the lens-like free form for a motor vehicle headlight is bright molded, particularly on both sides, wherein the glass is melted in a melting unit having a capacity of no more than 80 kg/h, wherein the glass comprised 0.2 to 2% weight Al 2 O 3 , 0 to 1% by weight Li 2 O, 0.3 to 1.5% by weight Sb 2 O 3 , 0.3 to 2% weight TiO 2 , and 0 to 1% by weight Er 2 O 3 .
1 - 20 . (canceled)
21 . Method for producing an optical glass element; the method comprising:
melting glass in a melting aggregate having a capacity of not more than 80 kg/h, wherein the glass comprises at least one of the group consisting of
0.2 to 2% by weight Al 2 O 3,
0.1 to 1% by weight Li 2 O ,
0.3 to 1.5% by weight Sb 2 O 3,
0.3 to 2% by weight TiO 2, and
0.01 to 1% by weight Er 2 O 3 ;
moulding a blank is from the glass; and
blank-moulding one of the group consisting of (a) optical glass element, (b) motor vehicle headlight lens and (c) lens-type shaped body for a motor vehicle headlight from the blank.
22 . Method according to claim 21 , wherein the glass comprises
60 to 75% by weight SiO 2,
3 to 12% by weight Na 2 O ,
3 to 12% by weight K 2 O , and
3 to 12% by weight CaO.
23 . Method according to claim 22 , wherein the glass comprises
0 to 5% by weight MgO ,
0 to 2% by weight SrO, and
0 to 3% by weight B 2 O 3 .
24 . Method according to claim 21 , wherein the glass comprises
0 to 5% by weight MgO ,
0 to 2% by weight SrO, and
0 to 3% by weight B 2 O 3 .
25 . Method according to claim 23 , wherein the glass comprises 0.5 to 6% by weight ZnO.
26 . Method according to claim 21 , wherein the glass comprises 0.5 to 6% by weight ZnO.
27 . Method according to claim 21 , wherein the glass comprises 0.3 to 0.8% by weight Al 2 O 3 .
28 . Method according to claim 21 , wherein the glass comprises 0.3 to 1.4% by weight Al 2 O 3 .
29 . Method according to claim 21 , wherein the glass comprises 0.3 to 2% by weight BaO.
30 . Method according to claim 22 , wherein the glass comprises 0.3 to 0.8% by weight Al 2 O 3 .
31 . Method according to claim 22 , wherein the glass comprises 0.3 to 1.4% by weight Al 2 O 3 .
32 . Method according to claim 22 , wherein the glass comprises 0.3 to 2% by weight BaO.
33 . Method according to claim 21 , wherein the glass comprises 0.1 to 0.4% by weight Li 2 O.
34 . Method according to claim 21 , wherein the glass comprises 0.01 to 0.3% by weight Er 2 O 3 .
35 . Method according to claim 21 , wherein the glass is melted from a batch in the melting aggregate.
36 . Method according to claim 22 , wherein the glass is melted from a batch in the melting aggregate.
37 . Method according to claim 21 , wherein the glass is melted in the melting aggregate at a temperature of not more than 1500° C.
38 . Method according to claim 22 , wherein the glass is melted in the melting aggregate at a temperature of not more than 1500° C.
39 . Method according to claim 21 , wherein glass is melted in the melting aggregate at a temperature of not less than 1000° C.
40 . Method according to claim 22 , wherein glass is melted in the melting aggregate at a temperature of not less than 1000° C.
41 . Method according to claim 21 , the method further comprising:
maintaining a batch carpet having a thickness of between 2 cm and 7 cm on the molten the glass in the melting aggregate.
42 . Method according to claim 22 , the method further comprising:
maintaining a batch carpet having a thickness of between 2 cm and 7 cm on the molten the glass in the melting aggregate.
43 . Method according to claim 22 , the method further comprising:
reversing the temperature gradient in the blank.
44 . Method according to claim 21 , the method further comprising:
reversing the temperature gradient in the blank.
45 . Method according to claim 44 , wherein the blank, for reversing its temperature gradient, is moved lying on a cooled lance through a tempering device.
46 . Method according to claim 44 , wherein the blank, for reversing its temperature gradient, is held in a tempering device.
47 . Method according to claim 44 , wherein a gradient of the viscosity of the blank before blank-moulding is at least 10 4 Pa·s.
48 . Method according to claim 21 , wherein a gradient of the viscosity of the blank before blank-moulding is at least 10 4 Pa·s.
49 . Method according to claim 21 , wherein a gradient of the viscosity of the blank before blank-moulding is at least 10 5 Pa·s.
50 . Method according to claim 21 , wherein the mass of the blank amounts to 50 g to 250 g.
51 . Method for producing an optical glass element; the method comprising:
melting glass in a melting aggregate having a capacity of not more than 80 kg/h, wherein the glass comprises
0.2 to 2% by weight Al 2 O 3,
0.3 to 1.5% by weight Sb 2 O 3,
0.3 to 2% by weight TiO 2,
60 to 75% by weight SiO 2,
3 to 12% by weight Na 2 O ,
3 to 12% by weight K 2 O ,
3 to 12% by weight CaO,
0 to 5% by weight MgO ,
0 to 3% by weight B 2 O 3 ,
0.5 to 6% by weight ZnO and
0.3 to 2% by weight BaO;
moulding a blank is from the glass; and
blank-moulding one of the group consisting of (a) optical glass element, (b) motor vehicle headlight lens and (c) lens-type shaped body for a motor vehicle headlight from the blank.
52 . Method according to claim 51 , wherein the glass comprises 0.5 to 5% by weight MgO.
53 . Method according to claim 51 , wherein the glass comprises 0.3 to 3% by weight B 2 O 3 .
54 . Method according to claim 52 , wherein the glass comprises 0.3 to 3% by weight B 2 O 3 .
55 . Method according to claim 51 , wherein the glass comprises less than 0.015% by weight Fe 2 O 3 .
56 . Method according to claim 52 , wherein the glass comprises less than 0.015% by weight Fe 2 O 3 .
57 . Method according to claim 53 , wherein the glass comprises less than 0.015% by weight Fe 2 O 3 .
58 . Method for producing an optical glass element; the method comprising:
melting glass in a melting aggregate having a capacity of not more than 80 kg/h, wherein the glass comprises 0.2 to 2% by weight Al 2 O 3, 60 to 75% by weight SiO 2, 3 to 12% by weight Na 2 O , 3 to 12% by weight K 2 O , and 3 to 12% by weight CaO, and wherein the glass comprises less than 0.015% by weight Fe 2 O 3 ;
moulding a blank is from the glass; and
blank-moulding one of the group consisting of (a) optical glass element, (b) motor vehicle headlight lens and (c) lens-type shaped body for a motor vehicle headlight from the blank.
59 . Method according to claim 58 , wherein the glass comprises
0 to 5% by weight MgO ,
0 to 2% by weight SrO, and
0 to 3% by weight B 2 O 3 .
60 . Method according to claim 58 , wherein the glass comprises 0.3 to 1.4% by weight Al 2 O 3 .
61 . Method according to claim 58 , wherein the glass comprises 0.3 to 2% by weight BaO.
62 . Method according to claim 58 , wherein the glass comprises 0.1 to 0.4% by weight Li 2 O.
63 . Method according to claim 58 , wherein the glass comprises 0.01 to 0.3% by weight Er 2 O 3 .
64 . Method according to claim 58 , wherein the glass is melted from a batch in the melting aggregate.
65 . Method according to claim 58 , wherein the glass is melted in the melting aggregate at a temperature of not more than 1500° C.
66 . Method according to claim 58 , wherein glass is melted in the melting aggregate at a temperature of not less than 1000° C.
67 . Method according to claim 58 , the method further comprising:
maintaining a batch carpet having a thickness of between 2 cm and 7 cm on the molten the glass in the melting aggregate.
68 . Method according to claim 58 , wherein the mass of the blank amounts to 50 g to 250 g.