US4326178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge laser
Assignee: USPHILIPS Corp A CORP OF DEL
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Filing: 1979-12-28
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Granted: 1982-04-20
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Expires: 1999-12-28
Abstract
Abstract A gas discharge laser comprising a glass cylindrical discharge vessel having at least one end sealed by means of a metal cap provided at its center with a reflector body and in which a metal exhaust tube is connected eccentrically to the cap. By forming the metal cap in the shape of a truncated cone and providing the metal exhaust tube in the conical surface therof, a gas discharge laser having a high degree of directional stability is obtained.
Inventors
- 👤 Hans G. Van den Brink
- 👤 Theodorus F. Lamboo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:51
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A gas discharge laser comprising a glass cylindrical discharge vessel containing a gas including an active lasing medium, means including a pair of reflectors at opposite ends of the discharge vessel for defining a resonant cavity, means including first and second electrodes for establishing an electric discharge in said gas, a metal cap in the shape of a truncated cone sealing one end of the discharge vessel, the truncated cone metal cap having an apical surface and a conical surface, a metal exhaust tube eccentrically located in the conical surface of the metal cap, and a reflector member including one of said reflectors and mounted in the center of the apical surface of the truncated cone metal cap.
Claim 2
Dependent Claim
118 words
A gas discharge laser comprising a glass cylindrical discharge vessel containing a gas including an active lasing medium, means including a pair of reflectors at opposite ends of the discharge vessel for defining a resonant cavity, means including first and second electrodes for establishing an electric discharge in said gas, a metal cap in the shape of a truncated cone sealing one end of the discharge vessel, the truncated cone metal cap having an apical surface and a conical surface, a metal exhaust tube eccentrically located in the conical surface of the metal cap, and a reflector member including one of said reflectors and mounted in the center of the apical surface of the truncated cone metal cap.
Claim 3
Dependent Claim
27 words
A gas discharge laser as claimed in claim 1 wherein the conical surface of the metal cap is formed into a cylindrical collar at its widest end.
Claim 4
Dependent Claim
26 words
A gas discharge laser as claimed in claims 1 or 2 wherein the apical surface of the truncated cone forms an apical angle of approximately 150°.
Claim 5
Dependent Claim
33 words
A gas discharge laser as claimed in claims 1 or 2 wherein the discharge vessel has a diameter of approximately 30 mm and the apical surface has a diameter of approximately 12 mm.
Claim 6
Dependent Claim
53 words
A gas discharge laser as claimed in claim 1, wherein the resonant cavity defining means further comprises a laser capillary tube within the discharge vessel and having a longitudinal axis that coincides with the optical axes of said reflectors, and wherein one of said reflectors allows energy to be abstracted from the laser.
References Cited (Backward Citations)
US4081762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |