US4785458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser device
Assignee: Mitsubishi Electric Corp
•
Filing: 1985-02-07
•
Granted: 1988-11-15
•
Expires: 2005-02-07
Abstract
Abstract A gas laser device comprises a discharge tube made of a dielectric material; a laser medium gas which is circulated at a high speed within the discharge tube in the axial direction of the discharge tube; an optical resonator composed of a total refelection mirror and a partial reflection mirror, both being disposed in mutual confrontation at both ends of the discharge tube; a plurality of electrodes oppositely provided on the outer periphery of the discharge tube; and a power source for applying an a.c. voltage to the oppositely provided electrodes to generate silent discharge.
Inventors
- 👤 Masaki Kuzumoto
- 👤 Shigenori Yagi
- 👤 Shuji Ogawa
- 👤 Koji Yasui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:55
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/0305; H01S3/036; H01S3/038; H01S3/09; H01S3/097; H01S3/0975; H01S3/05; H01S3/06; H01S3/07; H01S3/073
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
124 words
A gas laser device, which comprises in combination: (a) a discharge tube made of a dielectric material; (b) a laser medium gas which is circulated within said discharge tube in the axial direction thereof; (c) an optical resonator composed of mirrors disposed in mutual confrontation at both ends of said discharge tube; (d) a p lurality of electrodes provided on radially opposite sides of the outer periphery of said discharge tube; and (e) a power source for applying an a.c. voltage to said electrodes to generate silent discharge; (f) a metal piece provided in the vicinity of the discharge section and extending through said discharge tube wherein a trigger potential is applied to said metal piece through a capacitor to cause a trigger discharge.
Claim 2
Dependent Claim
124 words
A gas laser device, which comprises in combination: (a) a discharge tube made of a dielectric material; (b) a laser medium gas which is circulated within said discharge tube in the axial direction thereof; (c) an optical resonator composed of mirrors disposed in mutual confrontation at both ends of said discharge tube; (d) a p lurality of electrodes provided on radially opposite sides of the outer periphery of said discharge tube; and (e) a power source for applying an a.c. voltage to said electrodes to generate silent discharge; (f) a metal piece provided in the vicinity of the discharge section and extending through said discharge tube wherein a trigger potential is applied to said metal piece through a capacitor to cause a trigger discharge.
Claim 3
Dependent Claim
24 words
A gas laser device according to claim 1, wherein said laser medium gas is circulated at a high speed of 100 m/s or more.
Claim 4
Dependent Claim
31 words
A gas laser device according to claim 2, wherein said laser medium gas is circulated by a gas feeding tube connected in the vicinity of both ends of said discharge tube.
Claim 5
Dependent Claim
40 words
A gas laser device according to claim 3, wherein said laser medium gas is circulated to both ends of said discharge tube from the substantially center part of said discharge tube through the center part of said gas feeding tube.
Claim 6
Dependent Claim
18 words
A gas laser device according to claim 3, wherein said laser medium gas is circulated by a blower.
Claim 7
Dependent Claim
19 words
A gas laser device according to claim 5, wherein said laser medium gas is circulated through a heat exchanger.
Claim 8
Dependent Claim
26 words
A gas laser device according to claim 1, wherein a voltage is applied from said high frequency power source to said metal piece through a capacitor.
Claim 9
Dependent Claim
17 words
A gas laser device according to claim 1, wherein said metal piece is grounded through said capacitor.
Claim 10
Dependent Claim
27 words
A gas laser device according to claim 1, wherein said metal piece is disposed upstream of the gas current from the discharge section in said discharge tube.
Claim 11
Dependent Claim
26 words
A gas laser device according to claim 1, wherein said metal piece is provided at a position avoiding an oscillating beam path for the laser beam.
Claim 12
Dependent Claim
33 words
A gas laser device according to claim 10, wherein said metal piece is provided at a position in contiguity to a gas contraction nozzle for said laser medium gas in said discharge tube.
Claim 13
Dependent Claim
23 words
A gas laser device according to claim 11, wherein a pair of metal pieces are oppositely disposed at said gas contraction nozzle part.
Claim 14
Dependent Claim
32 words
A gas laser device according to claim 1, wherein the capacitance of said capacitor is made less than one tenth of the static capacitance of said discharge section in said discharge tube.
Claim 15
Dependent Claim
16 words
A gas laser device according to claim 1, wherein said discharge tube is made of glass.
Claim 16
Dependent Claim
17 words
A gas laser device according to claim 14, wherein said discharge tube is made of Pyrex glass.
Claim 17
Dependent Claim
16 words
A gas laser device according to claim 1, wherein said discharge tube is made of ceramic.
Claim 18
Dependent Claim
18 words
A gas laser device according to claim 1, wherein said discharge tube is formed in a tubular shape.
Claim 19
Dependent Claim
30 words
A gas laser device according to claim 1, wherein said discharge tube is made of a dielectric material having a dielectric constant in a range of from 20 to 800.
Claim 20
Dependent Claim
25 words
A gas laser device according to claim 18, wherein said dielectric material is one selected from the group consisting of titanium oxide and strontium titanate.
Claim 21
Dependent Claim
35 words
A gas laser device according to claim 18, wherein said dielectric material is one selected from the group consisting of a mixture of alumina and titanium oxide, and a mixture of alumina and strontium titanate.
Claim 22
Dependent Claim
107 words
A gas laser device, which comprises in combination; (a) a discharge tube made of a dielectric material; (b) a laser medium gas which is circulated within said discharge tube in the axial direction thereof; (c) an optical resonator composed of mirrors disposed in mutual confrontation at both ends of said discharge tube; (d) a pair of electrodes provided on radially opposite sides of the outer periphery of said discharge tube to provide a discharge path passing through the axial line of said tube; and (e) a power source for applying an a.c. voltage in a range of 50 Hz-1 MHz to said electrodes to generate silent discharge.
Claim 23
Dependent Claim
107 words
A gas laser device, which comprises in combination; (a) a discharge tube made of a dielectric material; (b) a laser medium gas which is circulated within said discharge tube in the axial direction thereof; (c) an optical resonator composed of mirrors disposed in mutual confrontation at both ends of said discharge tube; (d) a pair of electrodes provided on radially opposite sides of the outer periphery of said discharge tube to provide a discharge path passing through the axial line of said tube; and (e) a power source for applying an a.c. voltage in a range of 50 Hz-1 MHz to said electrodes to generate silent discharge.
Claim 24
Dependent Claim
38 words
A gas laser device according to claim 21, wherein a metal piece is provided in the vicinity of the discharge section in said discharge tube, and a trigger potential is applied to said metal piece through a capacitor.
Claim 25
Dependent Claim
26 words
A gas laser device according to claim 22, wherein a voltage is applied from said high frequency power source to said metal piece through a capacitor.
Claim 26
Dependent Claim
17 words
A gas laser device according to claim 22, wherein said metal piece is grounded through said capacitor.
Claim 27
Dependent Claim
27 words
A gas laser device according to claim 22, wherein said metal piece is disposed upstream of the gas current from the discharge section in said discharge tube.
Claim 28
Dependent Claim
26 words
A gas laser device according to claim 22, wherein said metal piece is provided at a position avoiding an oscillating beam path for the laser beam.
Claim 29
Dependent Claim
33 words
A gas laser device according to claim 26, wherein said metal piece is provided at a position in contiguity to a gas contraction nozzle for said laser medium gas in said discharge tube.
Claim 30
Dependent Claim
23 words
A gas laser device according to claim 27, wherein a pair of metal pieces are oppositely disposed at said gas contraction nozzle part.
Claim 31
Dependent Claim
32 words
A gas laser device according to claim 22, wherein the capacitance of said capacitor is made less than one tenth of the static capacitance of said discharge section in said discharge tube.
Claim 32
Dependent Claim
16 words
A gas laser device according to claim 21, wherein said discharge tube is made of glass.
Claim 33
Dependent Claim
17 words
A gas laser device according to claim 30, wherein said discharge tube is made of Pyrex glass.
Claim 34
Dependent Claim
16 words
A gas laser device according to claim 21, wherein said discharge tube is made of ceramic.
Claim 35
Dependent Claim
18 words
A gas laser device according to claim 21, wherein said discharge tube is formed in a tubular shape.
Claim 36
Dependent Claim
30 words
A gas laser device according to claim 21, wherein said discharge tube is made of a dielectric material having a dielectric constant in a range of from 20 to 800.
Claim 37
Dependent Claim
25 words
A gas laser device according to claim 34, wherein said dielectric material is one selected from the group consisting of titanium oxide and strontium titanate.
Claim 38
Dependent Claim
35 words
A gas laser device according to claim 34, wherein said dielectric material is one selected from the group consisting of a mixture of alumina and titanium oxide, and a mixture of alumina and strontium titanate.
References Cited (Backward Citations)
US4085385A
Cited
US4329662A
Cited
US4245194A
Cited
US4417342A
Cited
GB2119443A
Cited
US4618961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |