US4704371A
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Infrared-transparent chalcogenide glass
Assignee: Schott AG
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Filing: 1986-09-26
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Granted: 1987-11-03
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Expires: 2006-09-26
Abstract
Abstract Infrared-transparent bi- or multicomponent chalcogenide glasses based on germanium and selenium are improved by doping with 0.05 to 1.0 atom % of at least one of the alkaline earth metals calcium or strontium and/or one of their compounds. Optical fibers and optical elements can be made from these glasses.
Inventors
- 👤 Hans-Georg Krolla
- 👤 Magdalena Winkler-Trudewig
- 👤 Werner Schumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:37
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/10; C03C13/00; C03C13/04; C03C13/041; C03C13/043; C03C3/00; C03C3/32; C03C3/321; G; G02; G02B; G02B1/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
57 words
In a dopant-containing infrared-transparent chalcogenide glass comprising germanium and selenium, the improvement wherein said chalcogenide glass comprises 5-50 atom % germanium, 25-94 atom % selenium, and dopant, wherein said dopant comprises 0.05 to 1.0 atom % of at least one of the alkaline earth metals selected from the group consisting of calcium, strontium and a compound thereof.
Claim 2
Dependent Claim
57 words
In a dopant-containing infrared-transparent chalcogenide glass comprising germanium and selenium, the improvement wherein said chalcogenide glass comprises 5-50 atom % germanium, 25-94 atom % selenium, and dopant, wherein said dopant comprises 0.05 to 1.0 atom % of at least one of the alkaline earth metals selected from the group consisting of calcium, strontium and a compound thereof.
Claim 3
Dependent Claim
12 words
A glass according to claim 1, wherein the dopant is exclusively calcium.
Claim 4
Dependent Claim
12 words
A glass according to claim 1, wherein the dopant is exclusively strontium.
Claim 5
Dependent Claim
55 words
A glass according to claim 1, wherein the glass was produced by employing the alkaline earth metal in the form of a halide, hydride, nitride, telluride, arsenide, antimonide, or in the form of a compound with a glass component of this bi- or multi-component chalcogenide glass system, or in the form of a mixture thereof.
Claim 6
Dependent Claim
20 words
A glass according to claim 1, further comprising antimony present in a concentration of not more than 28 atom %.
Claim 7
Dependent Claim
23 words
A glass according to claim 1 wherein said glass comprises 10-35 atom % germanium, 35-88.7 atom % selenium, and 0.1-0.3 atom % dopant.
Claim 8
Dependent Claim
17 words
A glass according to claim 6, further comprising antimony present in a concentration of 1-20 atom %.
Claim 9
Dependent Claim
12 words
A glass according to claim 1 wherein said glass comprises 0.1-0.3% dopant.
Claim 10
Dependent Claim
13 words
A glass according to claim 1, wherein said dopant is CaSbI 5 .
Claim 11
Dependent Claim
12 words
A glass according to claim 1, wherein said dopant is calcium iodide.
Claim 12
Dependent Claim
12 words
A glass according to claim 1, wherein said dopant is strontium iodide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |