Patent US4852296A successfully refreshed from Google Patents.
Patent US4815091A successfully refreshed from Google Patents.
US4815091A
Expired / Lapsed
US
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Metal vapor laser
Assignee: Mitsubishi Electric Corp
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Filing: 1988-05-11
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Granted: 1989-03-21
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Expires: 2008-05-11
Abstract
Abstract In a metal vapor laser, (e.g. copper vapor laser), the innermost heat shield (15) of Mo, Ta or W, which is disposed with a predetermined gap (preferably sufficiently larger than 0.3 mm) to the outer surface of the seal tube (8), is connected at respective ends to the anode terminal (2) and the anode (5), so that inductance of discharge load is considerably decreased.
Inventors
- 👤 Kazuhiko Hara
- 👤 Shigeo Ueguri
- 👤 Akihiko Iwata
- 👤 Tatsuki Okamoto
- 👤 Yoshihiro Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:12
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/031
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
123 words
A metal vapor laser comprising: a first electrode, a second electrode which are disposed apart each other in axial direction with a discharge region therebetween, a seal tube of an insulative substance for containing said first electrode and said second electrode therein. a predetermined amount of metal to be vaporized by discharging in the discharge region. an metal jacket enclosing the above-mentioned members therein and defining a vacuum space therein surrounding said seal tube, and at least one heat shield disposed in said vacuum space in a manner to surround said seal tube and apart from outer face of said seal tube and from each other, both ends of at least one of said heat shield being electrically connected to said metal jacket.
Claim 2
Dependent Claim
123 words
A metal vapor laser comprising: a first electrode, a second electrode which are disposed apart each other in axial direction with a discharge region therebetween, a seal tube of an insulative substance for containing said first electrode and said second electrode therein. a predetermined amount of metal to be vaporized by discharging in the discharge region. an metal jacket enclosing the above-mentioned members therein and defining a vacuum space therein surrounding said seal tube, and at least one heat shield disposed in said vacuum space in a manner to surround said seal tube and apart from outer face of said seal tube and from each other, both ends of at least one of said heat shield being electrically connected to said metal jacket.
Claim 3
Dependent Claim
15 words
A metal vapor laser in accordance with claim 1, wherein plural heat shields are provided.
Claim 4
Dependent Claim
23 words
A metal laser in accordance with claim 1, wherein both ends of the innermost heat shield is electrically connected to said metal jacket.
Claim 5
Dependent Claim
30 words
A metal vapor laser in accordance with claim 3, wherein said innermost heat shield is held apart from the outer face of said seal tube with a predetermined gap inbetween.
Claim 6
Dependent Claim
25 words
A metal vapor laser in accordance with claim 4, wherein said predetermined gas is held by providing gap spacers of insulative substance in said gap.
Claim 7
Dependent Claim
29 words
A metal vapor laser in accordance with claim 1, wherein at least ne heat shield has a face of optically high relectivity at least on the inner face thereof.
Claim 8
Dependent Claim
24 words
A metal vapor laser in accordance with claim 6, wherein plural layers of said heat shields are provided with predetermined gaps to each other.
Claim 9
Dependent Claim
38 words
A metal vapor laser in accordance with claim 6, wherein at least one of said heat shield is made of heat-resistive metal at least at the outer face side and has an inner face of optically high-reflectivity metal.
Claim 10
Dependent Claim
27 words
A metal vapor laser in accordance with claim 6, wherein p1 said face of optically high refectivity is made of Cu, Ag or Au or combination thereof.
Claim 11
Dependent Claim
18 words
A metal vapor laser in accordance with claim 6, wherein said heat-resistive metal is Mo, Ta or W.
Claim 12
Dependent Claim
41 words
A metal vapor laser n accordance with claim 1 which further comprises: a heat shielding layer formed tightly on the outer surface of said seal tube, and connections electrically connecting both ends of said heat shielding layer to said metal jacket.
Claim 13
Dependent Claim
22 words
A metal vapor laser in accordance with claim 11, wherein said heat shielding layer is formed by vapor deposition of heat-resistive metal.
Claim 14
Dependent Claim
21 words
A metal vapor laser in accordance with claim 11, wherein said heat shielding layer is formed by sputtering of heat-resistive metal.
Claim 15
Dependent Claim
25 words
A metal vapor laser in accordance with claim 1 which further comprises: a heat shielding layer formed on the inner surface of said metal jacket.
Claim 16
Dependent Claim
23 words
A metal vapor laser in accordance with claim 1 which further comprises: gap spacers to hold a predetermined gaps between neighboring heat shields.
Claim 17
Dependent Claim
21 words
A metal vapor laser in accordance with claim 15, wherein said gap spacers are coils of fine wire of heat-resistive metal.
Claim 18
Dependent Claim
23 words
A metal vapor laser in accordance with claim 15, wherein said gap spacers are zigzag formed ring of fine wire of heat-resistive metal.
Claim 19
Dependent Claim
27 words
A metal vapor laser in accordance with claim 15, wherein said gap spacers are a number of ceramic beads threaded by a fine wire of heat-resistive metal.
References Cited (Backward Citations)
US4694463A
Cited
US4736379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |