Patent US4767057A successfully refreshed from Google Patents.
Patent US4713824A successfully refreshed from Google Patents.
US4713824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noble-metal overcoated, front-surface silver reflectors
Assignee: Honeywell International Inc
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Filing: 1983-02-11
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Granted: 1987-12-15
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Expires: 2003-02-11
Abstract
Abstract A partially-transparent, noble-metal protective overcoat is provided to a front-surface silver reflector. The overcoat, preferably of gold, may be applied by vacuum-deposition or electrodeposition. Optimum overcoat thickness is the minimum required to protect the reflector in the environment of its intended use. The overcoated reflector of this invention is particularly well suited for the surface of a laser pump cavity.
Inventors
- 👤 Donald F. Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:59
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/0816; G02B5/085; G02B5/0875; G02B5/20; G02B5/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
In a reflector that includes a substrate having a reflective-silver coating on its front surface, the improvement comprising a partially-transparent gold overcoat on the coating.
Claim 2
Dependent Claim
25 words
In a reflector that includes a substrate having a reflective-silver coating on its front surface, the improvement comprising a partially-transparent gold overcoat on the coating.
Claim 3
Dependent Claim
23 words
The reflector of claim 1, in which the overcoat has a thickness in the range between about 1 nm and about 1,000 nm.
Claim 4
Dependent Claim
20 words
A process for preparing the reflector of claim 1 comprising the step of vacuum-depositing gold onto a front-surface reflective-silver coating.
Claim 5
Dependent Claim
30 words
The process of claim 3 comprising the further step of annealing the coating and overcoat at a temperature of at least about 300° C. for at least about one hour.
Claim 6
Dependent Claim
20 words
A process for preparing the reflector of claim 1 comprising the step of electrodepositing gold onto a front-surface relfective-silver coating.
Claim 7
Dependent Claim
30 words
The process of claim 5 comprising the further step of annealing the coating and overcoating at a temperature of at least about 300° C. for at least about one hour.
Claim 8
Dependent Claim
50 words
In a laser that includes a laser medium, pump means for exciting the laser medium to emit coherent radiation, and a pump cavity to enclose the laser medium and pump means, the improvement comprising an inner surface of said pump cavity having a reflective-silver coating and a partially-transparent gold overcoat.
Claim 9
Dependent Claim
50 words
In a laser that includes a laser medium, pump means for exciting the laser medium to emit coherent radiation, and a pump cavity to enclose the laser medium and pump means, the improvement comprising an inner surface of said pump cavity having a reflective-silver coating and a partially-transparent gold overcoat.
Claim 10
Dependent Claim
12 words
The laser of claim 7 in which the laser medium comprises alexandrite.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |