US4403828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damage resistant coated laser mirror
Assignee: RTX Corp
•
Filing: 1981-06-01
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Granted: 1983-09-13
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Expires: 2001-06-01
Abstract
Abstract A damage resistant laser mirror is disclosed comprising a copper substrate highly polished to an optical finish coated with a thin layer of molybdenum or tungsten. The composite has good reflecting properties, is damage-tough, and conducts heat well away from the reflective coating. The superior adhesion of the coating is demonstrated by the fact that severe staining can be removed from the surface of the mirror by abrasive polishing without removing or damaging the coating.
Inventors
- 👤 Jack W. Davis
- 👤 Paul R. Blaszuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
30 words
A damage resistant laser mirror comprising: a copper substrate polished to an optical, laser radiation reflective finish; and a thin film of molybdenum or tungsten coated on the copper substrate.
Claim 2
Dependent Claim
30 words
A damage resistant laser mirror comprising: a copper substrate polished to an optical, laser radiation reflective finish; and a thin film of molybdenum or tungsten coated on the copper substrate.
Claim 3
Dependent Claim
17 words
The mirror of claim 1 wherein the coating is about 10,000 A to about 2 microns thick.
Claim 4
Independent Claim
56 words
A method of restoring a stained laser mirror to laser reflecting quality comprising polishing the mirror in the presence of an abrasive to remove the staining, the improvement comprising polishing a molybdenum or tungsten coated copper mirror by such process without removing or damaging the coating, thus producing a highly polished, damage resistant, laser reflecting surface.
Claim 5
Independent Claim
56 words
A method of restoring a stained laser mirror to laser reflecting quality comprising polishing the mirror in the presence of an abrasive to remove the staining, the improvement comprising polishing a molybdenum or tungsten coated copper mirror by such process without removing or damaging the coating, thus producing a highly polished, damage resistant, laser reflecting surface.
Claim 6
Dependent Claim
20 words
The method of claim 3 wherein the abrasive is aluminum oxide with an average particle size of about 0.3 microns.
Claim 7
Dependent Claim
13 words
The method of claim 3 wherein the restoring is performed at least twice.
References Cited (Backward Citations)
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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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |