US4873693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for suppressing diffraction rings in a laser
Assignee: Melles Griot San Marcos Co
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Filing: 1988-11-30
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Granted: 1989-10-10
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Expires: 2008-11-30
Abstract
Abstract A laser comprises an interaction region formed by a wall surface of a capillary discharge tube which has been roughened along a continuous length thereof. This roughened surface suppresses and substantially eliminates diffraction rings in lasers.
Inventors
- 👤 Benjamin H. Cook, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:04
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/032; H01S3/0323; H01S3/038; H01S2301/00; H01S2301/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
54 words
A method of manufacturing a gas laser having an envelope for containing a laser gas and a tube in said envelope which surrounds an optical path, said method comprising flowing a substance through said tube to roughen interior surfaces of said tube such that diffraction rings in light output from said laser are suppressed.
Claim 2
Independent Claim
54 words
A method of manufacturing a gas laser having an envelope for containing a laser gas and a tube in said envelope which surrounds an optical path, said method comprising flowing a substance through said tube to roughen interior surfaces of said tube such that diffraction rings in light output from said laser are suppressed.
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein said substance comprises abrasive particles.
References Cited (Backward Citations)
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US4207154A
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US4367130A
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US3699471A
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US4589114A
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US4649545A
Cited
US4788686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |