US3790900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser mirror assembly
Assignee: Siemens AG
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Filing: 1971-11-29
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Granted: 1974-02-05
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Expires: 1991-11-29
Abstract
Abstract A gas laser tube structure for generating a laser output comprising an elongated, evacuated envelope containing a gas suitable for producing a glow discharge with the closed ends of said envelope being made non-reflective by cutting them at Brewster''s angle, hollow tubular members fixed at each end of said envelope, and reflective mirrors attached to the other end of said tubular members which define a resonant cavity of gastight construction. The gas laser preferably contains a gas in the resonant cavity which does not absorb the laser radiation and the reflective mirrors prior to sealing are adjustable with respect to the tubular member whereby optimum laser output is achieved. Also covers a method of making said gas laser tube structure by providing said envelope with a gas and closing it at its ends, placing around the non-reflective ends of said envelope a tubular member in a fixed manner, energizing the laser tube, fixing an end-piece containing a reflective surface to the other end of said tubular member during the energizing step, adjusting the end-piece with its reflective surface until maximum laser output is reached and then sealing said end-piece in properly adjusted condition to said tubular member in a gas-tight manner.
Inventors
- 👤 H Golser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:12
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
180 words
A gas laser comprising an elongated gas filled discharge tube means having mirror assembly means arranged at opposite ends thereof and forming an optical resonator between said two mirror assembly means, mirror means comprising a mirror mounted on a substrate, said substrate having a spherical grind about its outer area surrounding said mirror, said tube means having an inner, thin wall tubular cavity closed at its opposite first and second ends by closure plates inclined at Brewster''s angle, said mirror assembly means each including a cylindrical extension shell having a first end with a spherically ground surface for mating with said spherically ground mirror assembly means, a second end of each of said cylindrical extension shells being adjustably fitted over a respective first or second end of said inner cavity to allow lengthwise adjustment of said resonator, said mirror means being fastened in an adjustable position at said first end of said cylindrical extension shell to allow angular adjustment of said mirror with respect to a central axis of said resonator, said extension shell being cemented to said inner cavity.
Claim 2
Dependent Claim
180 words
A gas laser comprising an elongated gas filled discharge tube means having mirror assembly means arranged at opposite ends thereof and forming an optical resonator between said two mirror assembly means, mirror means comprising a mirror mounted on a substrate, said substrate having a spherical grind about its outer area surrounding said mirror, said tube means having an inner, thin wall tubular cavity closed at its opposite first and second ends by closure plates inclined at Brewster''s angle, said mirror assembly means each including a cylindrical extension shell having a first end with a spherically ground surface for mating with said spherically ground mirror assembly means, a second end of each of said cylindrical extension shells being adjustably fitted over a respective first or second end of said inner cavity to allow lengthwise adjustment of said resonator, said mirror means being fastened in an adjustable position at said first end of said cylindrical extension shell to allow angular adjustment of said mirror with respect to a central axis of said resonator, said extension shell being cemented to said inner cavity.
Claim 3
Dependent Claim
63 words
A gas laser according to claim 1 wherein said extension shells form spaces on either end of said inner cavity, said spaces being bounded in each case by said extension shell, said closure plate inclined at Brewster''s angle, and said mirror, said spaces defining outer cavities which are gas tight and which are filled with a gas which does not absorb laser radiation.
Claim 4
Independent Claim
173 words
A method for the production of an elongated gas filled discharge tube means for a gas laser comprising the steps of providing an inner, thin wall tubular cavity closed at its opposite first and second end by closure plates inclined at Brewster''s angle, fitting a first end of an open ended cylindrical extension shell over each end of said tube means, cementing said snuggly fitting extension shells to said tube means, said extension shells having an outer end opposite that from an inner end which is cemented to said tube means, said outer end having a spherically ground configuration, igniting the laser tube inner cavity, inserting mirrors having generally spherically ground outer portions into the ends of the extension shells by means of adjusting devices, aligning the mirrors for obtaining maximum ouptut power of the laser, and then cementing the mirrors in gas tight relationship with the extension shell and holding the mirrors by means of the adjusting devices until the cement hardens to hold the mirrors in place without the adjusting devices.
Claim 5
Independent Claim
173 words
A method for the production of an elongated gas filled discharge tube means for a gas laser comprising the steps of providing an inner, thin wall tubular cavity closed at its opposite first and second end by closure plates inclined at Brewster''s angle, fitting a first end of an open ended cylindrical extension shell over each end of said tube means, cementing said snuggly fitting extension shells to said tube means, said extension shells having an outer end opposite that from an inner end which is cemented to said tube means, said outer end having a spherically ground configuration, igniting the laser tube inner cavity, inserting mirrors having generally spherically ground outer portions into the ends of the extension shells by means of adjusting devices, aligning the mirrors for obtaining maximum ouptut power of the laser, and then cementing the mirrors in gas tight relationship with the extension shell and holding the mirrors by means of the adjusting devices until the cement hardens to hold the mirrors in place without the adjusting devices.
References Cited (Backward Citations)
US3566302A
Cited
US3568088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |