Patent US4932752A successfully refreshed from Google Patents.
US4932752A
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Fiber optic core glass compositions having a high refractive index
Assignee: Schott Glass Technologies Inc
•
Filing: 1989-06-05
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Granted: 1990-06-12
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Expires: 2009-06-05
Abstract
Abstract Glass fiber cores having a glass composition: -Compositional -Oxide Range in wt % -SiO2 25-35 -BaO 6-15 -K2O 1-6 -Na2O 0-4 -La2O3 0-10 -Nb2O5 4-12 -PbO 10-50 -TiO2 0-4. -
Inventors
- 👤 David G. Krashkevich
- 👤 Monika J. Liepmann
- 👤 Jon M. Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:50
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C13/046; G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/892
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
A glass fiber comprising a core glass and a cladding glass applied thereon, wherein the core glass consists essentially of: ______________________________________
Compositional
Oxide Range in wt %
______________________________________
SiO.sub.2 25-35
BaO 6-15
K.sub.2 O 1-6
Na.sub.2 O 0-4
La.sub.2 O.sub.3
0-10
Nb.sub.2 O.sub.5
4-12
PbO 10-50
TiO.sub.2 0-4.
______________________________________
Claim 2
Dependent Claim
49 words
A glass fiber comprising a core glass and a cladding glass applied thereon, wherein the core glass consists essentially of: ______________________________________
Compositional
Oxide Range in wt %
______________________________________
SiO.sub.2 25-35
BaO 6-15
K.sub.2 O 1-6
Na.sub.2 O 0-4
La.sub.2 O.sub.3
0-10
Nb.sub.2 O.sub.5
4-12
PbO 10-50
TiO.sub.2 0-4.
______________________________________
Claim 3
Dependent Claim
28 words
A fiber optic core glass fiber according to claim 1, wherein SiO 2 is present in an amount of 25-30%; and lead is present in amount of 20-50%.
Claim 4
Dependent Claim
16 words
A glass fiber according to claim 1, wherein BaO is present in an amount of 10-15%.
Claim 5
Dependent Claim
18 words
A glass fiber according to claim 1, wherein PbO is present in an amount of 40-50% by weight.
Claim 6
Dependent Claim
35 words
A glass fiber according to claim 1, having a core composition with the following properties: Coefficient of Thermal Expansion at 0°-400° C.: 70-95×10 -7 1/K; n d of 1.77-1.81 and softening point of 620°-700° C.
Claim 7
Dependent Claim
39 words
A glass fiber according to claim 1, wherein the cladding glass has the following properties: Coefficient of Thermal Expansion in K -1 (×10 -7 ): 40-55; n d of 1.45-1.50; softening point of 700°-720° C.; Tg of 400°-500° C.
Claim 8
Dependent Claim
15 words
A glass fiber according to claim 1, having a numerical aperture of 1 or greater.
Claim 9
Dependent Claim
15 words
A glass fiber according to claim 1, having a numerical aperture of less than 1.
Claim 10
Dependent Claim
33 words
In an electro-optical image tube comprising a fiber optic cathode, a fiber optic anode, and a micro channel plate, the improvement wherein the fiber optic anode comprises a glass fiber of claim 1.
Claim 11
Dependent Claim
31 words
In a fiber optic wafer tube, comprising a fiber optic cathode and fiber optic image inverter, the improvement wherein the fiber optic image inverter comprises a glass fiber of claim 1.
Claim 12
Dependent Claim
17 words
In a fiber optic faceplate, the improvement wherein the faceplate comprises a glass fiber of claim 1.
Claim 13
Dependent Claim
14 words
A faceplate according to claim 11, having a thickness of 0.5 to 1 inch.
Claim 14
Dependent Claim
14 words
A faceplate according to claim 12, having a numerical aperture of 1 or greater.
Claim 15
Dependent Claim
14 words
A faceplate according to claim 13, wherein said faceplate has green phosphor attached thereto.
Claim 16
Dependent Claim
14 words
A faceplate according to claim 11, having a numerical aperture of less than 1.
Claim 17
Dependent Claim
19 words
A fiber optic according to claim 1, further comprising Al 2 O 3 , ZnO, or ZrO 2 .
Claim 18
Dependent Claim
19 words
A fiber optic according to claim 1, further comprising Sb 2 O 3 or As 2 O 3 .
Claim 19
Dependent Claim
51 words
An optical mosaic comprising glass fibers having a core glass and a cladding glass wherein the core glass has the following composition: ______________________________________
Compositional
Oxide Range in wt %
______________________________________
SiO.sub.2 25-35
BaO 6-15
K.sub.2 O 1-6
Na.sub.2 O 0-4
La.sub.2 O.sub.3
0-10
Nb.sub.2 O.sub.5
4-12
PbO 10-50
TiO.sub.2 0-4.
______________________________________
Claim 20
Dependent Claim
51 words
An optical mosaic comprising glass fibers having a core glass and a cladding glass wherein the core glass has the following composition: ______________________________________
Compositional
Oxide Range in wt %
______________________________________
SiO.sub.2 25-35
BaO 6-15
K.sub.2 O 1-6
Na.sub.2 O 0-4
La.sub.2 O.sub.3
0-10
Nb.sub.2 O.sub.5
4-12
PbO 10-50
TiO.sub.2 0-4.
______________________________________
References Cited (Backward Citations)
US3503764A
Cited
US4367012A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
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