US4634831B1
Expired / Lapsed
US
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Laser-machining apparatus
Assignee: Rofin Sinar Laser GmbH
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Filing: 1984-01-30
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Granted: 1996-04-02
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Expires: 2004-01-30
Abstract
Abstract A laser apparatus is disclosed comprising a resonator for emitting a laser beam, an assembly for circularly or elliptically polarizing the laser beam emitted from the resonator, a lens assembly for focusing the laser beam from the polarizer to a workpiece with the laser beam from the polarizer to the lens having an axis, and the resonator having a folding mirror assembly for linearly polarizing the laser beam with the resonator being positioned relative to the polarizer so that the plane of reflection of the mirror assembly is approximately 45 degrees relative to the axis.
Inventors
- 👤 Hinrich Martinen
- 👤 Samuel S Simonsson
- 👤 Peter Wirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:38
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/105; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/064; B23K26/0643; B23K26/0648; B23K26/0665; H01S3/05; H01S3/08; H01S3/081
Claims Analysis
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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) | 1999-04-02 | 1999-10-02 | 2000-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-02 | 2003-10-02 | 2004-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-02 | 2007-10-02 | 2008-04-02 | $7700.00 | Window Closed / Lapsed |