Patent US3855543A successfully refreshed from Google Patents.
US3855543A
Expired / Lapsed
US
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Device for producing stimulated infrared emission
Assignee: US Philips Corp
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Filing: 1973-01-22
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Granted: 1974-12-17
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Expires: 1993-01-22
Abstract
Abstract A CO2 laser in which zeolite is present and in which water vapor is incorporated in the zeolite. The temperature of the zeolite is determined by the produced laser beam, for example, by providing the zeolite in one of the mirrors. The amount of water vapor released by the zeolite is dependent on the temperature of the zeolite, and there is a water vapor pressure at which the efficiency of the stimulated emission is at a maximum. The zeolite is so placed that it derives the proper heat from the beam at maximum efficiency to give off the proper amount of water vapor to maintain this efficiency. As a result of this, the water vapor can remain adapted to the optimum operational pressure for a longer period of time.
Inventors
- 👤 A Timmermans
- 👤 Vaan R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:15
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/036; H01S3/034
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
In an iraser for producing stimulated infrared emission: a discharge tube containing at least a mixture of carbon dioxide and water vapor; electric discharge means supported by said discharge tube for producing an iraser beam; and means for maintaining the stimulated infrared emission substantially at the most efficient level for said tube by maintaining the pressure of said water vapor in said tube at a predetermined value, said means comprising a quantity of zeolite that contains water vapor and is disposed within said tube and is thermally coupled to said beam to be heated thereby to give off water vapor, the thermal coupling between said zeolite and said beam being such that said zeolite is heated to a predetermined temperature to give off enough water vapor to maintain said water vapor at said predetermined value when the stimulated emission is at substantially its maximum efficiency, the efficiency of said emission dropping when said water vapor exceeds said predetermined value.
Claim 2
Dependent Claim
159 words
In an iraser for producing stimulated infrared emission: a discharge tube containing at least a mixture of carbon dioxide and water vapor; electric discharge means supported by said discharge tube for producing an iraser beam; and means for maintaining the stimulated infrared emission substantially at the most efficient level for said tube by maintaining the pressure of said water vapor in said tube at a predetermined value, said means comprising a quantity of zeolite that contains water vapor and is disposed within said tube and is thermally coupled to said beam to be heated thereby to give off water vapor, the thermal coupling between said zeolite and said beam being such that said zeolite is heated to a predetermined temperature to give off enough water vapor to maintain said water vapor at said predetermined value when the stimulated emission is at substantially its maximum efficiency, the efficiency of said emission dropping when said water vapor exceeds said predetermined value.
Claim 3
Dependent Claim
40 words
The iraser of claim 1, wherein said discharge tube has two mirrors disposed therein at opposite ends thereof, one of said mirrors serving for coupling out, and the other mirror having at least one cavity therein for receiving said zeolite.
Claim 4
Dependent Claim
17 words
The iraser of claim 2 wherein the zeolite is disposed on a discharge side of said mirror.
Claim 5
Dependent Claim
49 words
The iraser of claim 2 wherein the zeolite is disposed opposite a discharge side of said mirror and said tube comprises an envelope section at one end section of said discharge tube, said envelope section communicating with the remainder of said discharge tube through an aperture in said tube.
Claim 6
Dependent Claim
72 words
The iraser of claim 1 comprising, in addition: a holder containing said zeolite disposed within said discharge tube, said tube comprising a resonant cavity and said holder being within said resonant cavity but lying outside a discharge track thereof, said holder comprising means disposed thereon for intercepting a part of said iraser beam for withdrawing sufficient thermal energy therefrom to maintain said zeolite at said predetermined temperature during operation of said device.
Claim 7
Dependent Claim
12 words
The iraser of claim 5 wherein said holder means comprises a plate.
Claim 8
Dependent Claim
12 words
The iraser of claim 5 wherein said holder means comprises a wire.
Claim 9
Dependent Claim
67 words
The iraser of claim 1 Wherein said discharge tube comprises: a side tube containing said zeolite in a portion thereof; and a resonant cavity, said zeolite-containing portion of the side tube communicating with said resonant cavity and lying approximately in the path of said iraser beam to extract sufficient thermal energy from said beam to maintain said zeolite at said predetermined temperature during operation of said device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |