US4696011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser device employing a porous material in the discharge chamber
Assignee: Oxford Lasers Ltd
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Filing: 1985-10-18
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Granted: 1987-09-22
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Expires: 2005-10-18
Abstract
Abstract A lasing device which uses as a lasing media a material which lases in the gas or vapor phase, and in which the discharge chamber includes a porous element which absorbs the lasing material when it condenses into the liquid or solid phase. The porous element, which can be a porous ceramic material, retains the liquid media and does not allow it to run along the discharge tube if this tube is moved or tilted. The laser is thus able to operate when being moved or tilted.
Inventors
- 👤 Andrew J. Kearsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:41
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/031
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
109 words
A laser device comprising a hollow elongated element, the interior of said element forming a discharge chamber; a lasing medium contained within said chamber; means for producing within said chamber conditions for stimulated emission of said medium; and a porous material extending along at least a major portion of the length of the interior of said hollow elongated element, a portion of said lasing medium being vaporized when said conditions for stimulated emission exist within said chamber and the remainder thereof being molten, the molten portion of said lasing medium being absorbed into said porous material and retained therein without allowing conduction therethrough along the length of said chamber.
Claim 2
Dependent Claim
109 words
A laser device comprising a hollow elongated element, the interior of said element forming a discharge chamber; a lasing medium contained within said chamber; means for producing within said chamber conditions for stimulated emission of said medium; and a porous material extending along at least a major portion of the length of the interior of said hollow elongated element, a portion of said lasing medium being vaporized when said conditions for stimulated emission exist within said chamber and the remainder thereof being molten, the molten portion of said lasing medium being absorbed into said porous material and retained therein without allowing conduction therethrough along the length of said chamber.
Claim 3
Dependent Claim
28 words
A laser device as claimed in claim 1 wherein said hollow elongated element comprises a non-porous tube and said porous material is in the form of a paste.
Claim 4
Dependent Claim
17 words
A laser device as claimed in claim 2, wherein said discharge chamber has a non-circular cross-section (37).
Claim 5
Dependent Claim
38 words
A laser device as claimed in claim 1 wherein said lasing medium is mixed with said porous material, said medium being in the form of lumps which form hollows in said porous material after operation of said device.
Claim 6
Dependent Claim
17 words
A laser device as claimed in claim 4, wherein said discharge chamber has a non-circular cross-section (37).
Claim 7
Dependent Claim
31 words
A laser device as claimed in claim 1 wherein said lasing medium is mixed with said porous material, said medium being in the form of granules distributed through said porous material.
Claim 8
Dependent Claim
17 words
A laser device a claimed in claim 6, wherein said discharge chamber has a non-circular cross-section (37).
Claim 9
Dependent Claim
46 words
A laser device as claimed in claim 1 wherein said hollow elongated element comprises a non-porous tube and said porous material comprises a non-porous member having a multiplicity of holes therethrough of a size suitable for retaining said lasing medium in the molten or solid state.
Claim 10
Dependent Claim
17 words
A laser device as claimed in claim 8, wherein said discharge chamber has a non-circular cross-section (37).
Claim 11
Dependent Claim
17 words
A laser device as claimed in claim 1 wherein said hollow elongated member is a tubular insulator.
Claim 12
Dependent Claim
17 words
A laser device as claimed in claim 10, wherein said discharge chamber has a non-circular cross-section (37).
Claim 13
Dependent Claim
16 words
A laser device as claimed in claim 1 wherein said discharge chamber has a non-circular cross-section.
Claim 14
Dependent Claim
38 words
A laser device as claimed in claim 2 wherein said lasing medium is mixed with said porous material, said medium being in the form of lumps which form hollows in said porous material after operation of said device.
Claim 15
Dependent Claim
17 words
A laser device as claimed in claim 13, wherein said discharge chamber has a non-circular cross-section (37).
Claim 16
Dependent Claim
31 words
A laser device as claimed in claim 2 wherein said lasing medium is mixed with said porous material, said medium being in the form of granules distributed through said porous material.
Claim 17
Dependent Claim
17 words
A laser device as claimed in claim 15, wherein said discharge chamber has a non-circular cross-section (37).
References Cited (Backward Citations)
US4475202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |