US4375690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-phase silent discharge gas laser apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1980-11-13
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Granted: 1983-03-01
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Expires: 2000-11-13
Abstract
Abstract A silent discharge gas laser apparatus has three or more electrodes arranged in axial symmetry with the laser radiation axis and supplied with voltage from a multi-phase high frequency power source to establish a continuous discharge and a higher discharge density at reduced frequencies, particularly in the central region of the discharge zone.
Inventors
- 👤 Norikazu Tabata
- 👤 Shigenori Yagi
- 👤 Takanori Ueno
- 👤 Shuji Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:19
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0975; H01S3/02; H01S3/03; H01S3/036; H01S3/038
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
70 words
A silent discharge gas laser apparatus, comprising: (a) means defining a laser resonator, (b) means for establishing a flow of gas in said resonator, (c) at least three electrodes arranged in axial symmetry with respect to a laser radiation axis of said resonator, (d) a multi-phase high frequency power source for generating voltage signals of at least three phases, and (e) means for applying said voltage signals across the electrodes.
Claim 2
Dependent Claim
70 words
A silent discharge gas laser apparatus, comprising: (a) means defining a laser resonator, (b) means for establishing a flow of gas in said resonator, (c) at least three electrodes arranged in axial symmetry with respect to a laser radiation axis of said resonator, (d) a multi-phase high frequency power source for generating voltage signals of at least three phases, and (e) means for applying said voltage signals across the electrodes.
Claim 3
Dependent Claim
12 words
An apparatus according to claim 1 wherein the electrodes are identically shaped.
Claim 4
Dependent Claim
26 words
An apparatus according to claim 1 wherein the power source supplies voltage signals to the respective electrodes in sequence such that a rotating discharge is established.
Claim 5
Independent Claim
26 words
An apparatus according to claims 1, 2 or 3 wherein the number of the electrodes and the number of phases of the power source are equal.
Claim 6
Dependent Claim
79 words
A silent discharge gas laser apparatus, comprising: (a) a discharge tube made of a dielectric material and defining a discharge zone therewithin, (b) means for establishing a flow of gas in said discharge tube, (c) at least three electrodes disposed on an outer wall of the discharge tube in axial symmetry therewith, (d) a multi-phase high frequency power source for generating voltage signals of at least three phases, and (e) means for applying said voltage signals across the electrodes.
Claim 7
Dependent Claim
79 words
A silent discharge gas laser apparatus, comprising: (a) a discharge tube made of a dielectric material and defining a discharge zone therewithin, (b) means for establishing a flow of gas in said discharge tube, (c) at least three electrodes disposed on an outer wall of the discharge tube in axial symmetry therewith, (d) a multi-phase high frequency power source for generating voltage signals of at least three phases, and (e) means for applying said voltage signals across the electrodes.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 5 wherein the discharge tube axis and a laser radiation axis coincide.
Claim 9
Independent Claim
37 words
An apparatus according to claims 5 or 6 wherein there are six electrodes disposed in axial symmetry on the outer wall of the discharge tube, and the power source is a six phase high frequency power source.
Claim 10
Dependent Claim
74 words
A silent discharge gas laser apparatus, comprising: (a) at least three electrode tubes arranged in axial symmetry with respect to an axis of laser radiation, (b) dielectric material covering said tubes, (c) means for establishing a flow of gas in a resonance zone between said tubes, (d) a multi-phase high frequency power source for generating voltage signals of at least three phases, and (e) means for applying said voltage signals across the electrode tubes.
Claim 11
Dependent Claim
74 words
A silent discharge gas laser apparatus, comprising: (a) at least three electrode tubes arranged in axial symmetry with respect to an axis of laser radiation, (b) dielectric material covering said tubes, (c) means for establishing a flow of gas in a resonance zone between said tubes, (d) a multi-phase high frequency power source for generating voltage signals of at least three phases, and (e) means for applying said voltage signals across the electrode tubes.
Claim 12
Dependent Claim
17 words
An apparatus according to claim 8 wherein a dielectric cooling medium is circulated through the electrode tubes.
Claim 13
Dependent Claim
33 words
An apparatus according to claim 9 wherein the electrode tubes are arranged in parallel with the axis of laser radiation, are each equidistant from said axis, and are each equidistant from each other.
Claim 14
Independent Claim
36 words
An apparatus according to claims 8, 9 or 10 wherein there are six electrode tubes arranged in axial symmetry with the laser radiation axis, and the power source is a six phase high frequency power source.
References Cited (Backward Citations)
JPS5424591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |