Patent US5208825A successfully refreshed from Google Patents.
US5208825A
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Random polarization gas laser tube
Assignee: NEC Corp
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Filing: 1991-04-08
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Granted: 1993-05-04
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Expires: 2011-04-08
Abstract
Abstract In a random polarization gas laser tube, a pair of mirrors constituting an optical resonator have anisotropic characteristics and aligned such that directions showing highest reflection intensity are orthogonal to each other to obtain a stable polarizing characteristics.
Inventors
- 👤 Hiroyuki Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:17
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034; H01S3/05; H01S3/08; H01S3/086
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A random polarization gas laser tube comprising: a tube defining an envelope filled with laser gas; a pair of electrodes provided in the envelope to discharge said gas; and a pair of mirrors, each of the mirrors having an anisotropic reflection intensity wherein the reflection intensity varies with the angular orientation of the mirror and is highest in a first direction, the mirrors being respectively positioned on opposite ends of the tube with the direction of highest reflection intensity of one of the mirrors being orthogonal to the direction of highest reflection intensity of the other mirror, whereby the laser tube polarization characteristics are stabilized.
Claim 2
Dependent Claim
105 words
A random polarization gas laser tube comprising: a tube defining an envelope filled with laser gas; a pair of electrodes provided in the envelope to discharge said gas; and a pair of mirrors, each of the mirrors having an anisotropic reflection intensity wherein the reflection intensity varies with the angular orientation of the mirror and is highest in a first direction, the mirrors being respectively positioned on opposite ends of the tube with the direction of highest reflection intensity of one of the mirrors being orthogonal to the direction of highest reflection intensity of the other mirror, whereby the laser tube polarization characteristics are stabilized.
Claim 3
Dependent Claim
18 words
The random polarization gas laser tube as claimed in claim 1, wherein said laser gas is He-Ne gas.
References Cited (Backward Citations)
US4088964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |