US4611329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser
Assignee: WC HERAEUS A WEST GERMAN CORP GmbH
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Filing: 1984-09-25
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Granted: 1986-09-09
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Expires: 2004-09-25
Abstract
Abstract Gas laser of circular cross section perpendicular to the direction of beam propagation, having an optical resonator. The laser has, for continuous or modulated continuous beam operation, a tube as the inner electrode (2), which is connected to a high-frequency voltage source. The outer electrode (4) likewise comprises a tube which is disposed coaxially with the inner electrode (2). Between the two electrodes (2, 4) is the annular excitation chamber (3). The tube wall serving as outer electrode (4) is provided with slot-like cavities (1) which are open toward the excitation chamber (3) and serve for the cooling of the gas therein.
Inventors
- 👤 Volker Ernst
- 👤 Hans Opower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:13
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/04; H01S3/041
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
An electrically excited gas laser of circular cross section perpendicular to the direction of beam propagation, including: an excitation chamber bounded by two concentric tube walls which serve simultaneously as electrodes for the gas discharge, and the outer tube wall having, on its inside, cavities in the form of slots disposed side-by-side, which are open toward the excitation chamber.
Claim 2
Dependent Claim
59 words
An electrically excited gas laser of circular cross section perpendicular to the direction of beam propagation, including: an excitation chamber bounded by two concentric tube walls which serve simultaneously as electrodes for the gas discharge, and the outer tube wall having, on its inside, cavities in the form of slots disposed side-by-side, which are open toward the excitation chamber.
Claim 3
Dependent Claim
21 words
A gas laser in accordance with claim 1, in which the depth of said cavities is greater than their slot width.
Claim 4
Dependent Claim
23 words
A gas laser in accordance with claim 2, in which the ratio of slot width to cavity depth ranges from 1:5 to 1:20.
Claim 5
Dependent Claim
42 words
A gas laser in accordance with claim 1, in which two adjacent slots are separated by a wall and the ratio of the separating wall thickness between two adjacent slots to the slot width is in the range from 5:1 to 1:5.
Claim 6
Dependent Claim
32 words
A gas laser in accordance with claim 4, in which the ratio of the distance between slots to the slot width is constant over the entire length of said outer tube wall.
Claim 7
Dependent Claim
28 words
A gas laser in accordance with claim 1, in which said cavities are in the form of circumferential annular grooves on the inside of said outer tube wall.
Claim 8
Dependent Claim
30 words
A gas laser in accordance with claim 1, in which said cavities are in the form of longitudinal grooves extending parallel to the longitudinal axis of said concentric tube walls.
Claim 9
Dependent Claim
21 words
A gas laser in accordance with claim 7, in which the groove width diminishes in the radial direction toward said axis.
Claim 10
Dependent Claim
34 words
A gas laser in accordance with claim 1, in which two adjacent slots are separated by a slot wall and said slot wall is provided with passages in the region of the bottom thereof.
Claim 11
Dependent Claim
27 words
A gas laser in accordance with claim 1, in which said cavities extend in the form of helices about the longitudinal axis of said concentric tube walls.
Claim 12
Dependent Claim
22 words
A gas laser in accordance with claim 10, in which said cavities are disposed similarly to thread recesses of a multiple-thread screw.
Claim 13
Dependent Claim
20 words
A gas laser in accordance with claim 11, in which said outer tube wall is rotatable about its longitudinal axis.
Claim 14
Dependent Claim
21 words
A gas laser in accordance with claim 1, which includes means for cooling the outer surface of said outer tube wall.
Claim 15
Dependent Claim
17 words
A gas laser in accordance with claim 13, in which said cooling means comprises a cooling coil.
Claim 16
Dependent Claim
18 words
A gas laser in accordance with claim 1, in which said outer tube wall is at ground potential.
References Cited (Backward Citations)
US3172057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |