US4649546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser
Assignee: Siemens AG
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Filing: 1984-02-06
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Granted: 1987-03-10
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Expires: 2004-02-06
Abstract
Abstract A gas laser, includes: a tube having two ends to be filled with gas; and a plate-shaped window hermetically sealing at least one of the ends of the tube; the window including a carrier plate and a layer coating the inside of the carrier plate; the tube being formed of a first material with a first thermal coefficient of expansion (H 1 ) at least in vicinity of the one end thereof having the window; the layer being formed of a second material with a second thermal coefficient of expansion (H 2 ); the carrier plate being formed of a third material with a third thermal coefficient of expansion (H 3 ); the first and second materials being unadapted to each other; and the third material being thermally matched to the first material.
Inventors
- 👤 Rudolf Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:43
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034; H01S3/032; H01S3/0323
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
138 words
In a gas laser, comprising: a tube having two ends to be filled with gas; and a plate-shaped window hermetically sealing at least one of said ends of said tube; said window including a carrier plate and a layer coating the inside of said carrier plate; said tube being formed of a first material with a first thermal coefficient of expansion (H 1 ) at least in the vicinity of said one end thereof having said window; said layer being formed of a second material being quartz with a second thermal coefficient of expansion (H 2 ); said carrier plate being formed of a third material with a third thermal coefficient of expansion (H 3 ); said first and second materials being thermally unadapted to each other; and said third material being thermally matched to said first material.
Claim 2
Dependent Claim
138 words
In a gas laser, comprising: a tube having two ends to be filled with gas; and a plate-shaped window hermetically sealing at least one of said ends of said tube; said window including a carrier plate and a layer coating the inside of said carrier plate; said tube being formed of a first material with a first thermal coefficient of expansion (H 1 ) at least in the vicinity of said one end thereof having said window; said layer being formed of a second material being quartz with a second thermal coefficient of expansion (H 2 ); said carrier plate being formed of a third material with a third thermal coefficient of expansion (H 3 ); said first and second materials being thermally unadapted to each other; and said third material being thermally matched to said first material.
Claim 3
Dependent Claim
150 words
In a gas laser, comprising: a tube having two ends to be filled with gas; and a plate-shaped window hermetically sealing at least one of said ends of said tube; said window including a carrier plate and a layer coating the inside of said carrier plate; said tube being formed of a first material with a first thermal coefficient of expansion (H 1 ) at least in the vicinity of said one end thereof having said window; said layer being formed of a second material being quartz with a second thermal coefficient of expansion (H 2 ); said carrier plate being formed of a third material with a third thermal coefficient of expansion (H 3 ); said first and second materials being thermally unadapted to each other such that ΔH=|H 1 -H 2 |>10×10 -7 o K -1 ; and said third material being thermally matched to said first material.
Claim 4
Dependent Claim
150 words
In a gas laser, comprising: a tube having two ends to be filled with gas; and a plate-shaped window hermetically sealing at least one of said ends of said tube; said window including a carrier plate and a layer coating the inside of said carrier plate; said tube being formed of a first material with a first thermal coefficient of expansion (H 1 ) at least in the vicinity of said one end thereof having said window; said layer being formed of a second material being quartz with a second thermal coefficient of expansion (H 2 ); said carrier plate being formed of a third material with a third thermal coefficient of expansion (H 3 ); said first and second materials being thermally unadapted to each other such that ΔH=|H 1 -H 2 |>10×10 -7 o K -1 ; and said third material being thermally matched to said first material.
Claim 5
Dependent Claim
19 words
Gas laser according to claim 1, wherein said window is inclined at the Brewster angle relative to said tube.
Claim 6
Dependent Claim
20 words
Gas laser according to claim 1, wherein said layer has a thickness of substantially between 0.07 μm and 0.5 μm.
Claim 7
Dependent Claim
21 words
Gas laser according to claim 1, including another layer formed of said second material coating the outside of said carrier plate.
Claim 8
Dependent Claim
21 words
Gas laser according to claim 1, wherein said third material forming said carrier plate is the same as said first material.
Claim 9
Dependent Claim
19 words
Gas laser according to claim 1, including glass solder connecting said window to said one end of said tube.
Claim 10
Dependent Claim
18 words
Gas laser according to claim 2, wherein: 25×10 -7 o K -1 ≦ΔH≦140×10 -7 o K -1 .
Claim 11
Dependent Claim
18 words
Gas laser according to claim 2, wherein: 40×10 -7 o K -1 ≦ΔH≦110×10 -7 o K -1 .
Claim 12
Dependent Claim
18 words
Gas laser according to claim 2, wherein: 65×10 -7 o K -1 ≦ΔH≦95×10 -7 o K -1 .
Claim 13
Dependent Claim
13 words
Gas laser according to claim 2, wherein said first material is hard glass.
Claim 14
Dependent Claim
13 words
Gas laser according to claim 2, wherein said first material is soft glass.
Claim 15
Dependent Claim
27 words
Gas laser according to claim 2, wherein said first material is hard glass, and 45×10 -7 o K -1 ≦H 1 ≦60×10 -7 o K -1 .
Claim 16
Dependent Claim
27 words
Gas laser according to claim 2, wherein said first material is soft glass, and 70×10 -7 o K -1 ≦H 1 ≦100×10 -7 o K -1 .
Claim 17
Dependent Claim
15 words
Gas laser according to claim 1, wherein said first and third materials are soft glass.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |