US4431308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser angular speed detector employing non-optical output
Assignee: Honda Motor Co Ltd
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Filing: 1981-08-13
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Granted: 1984-02-14
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Expires: 2001-08-13
Abstract
Abstract A semiconductor ring laser apparatus is provided which comprises a semiconductor laser element having electrical terminals and optical terminals. An electrical power supply means is coupled to the electrical terminals for applying a voltage thereto and optical means are optically coupled to the optical terminals of the semiconductor laser element. The optical means form resonant ring optical paths in clockwise and counterclockwise directions for the light which is emitted by the semiconductor. Detector means are provided which are coupled to said electrical terminals for detecting voltage variations thereon caused by the rotation of the apparatus.
Inventors
- 👤 Yoshinobu Mitsuhashi
- 👤 Junichi Shimada
- 👤 Kenjiro Sakurai
- 👤 Yukinobu Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; H; H01; H01S; H01S5/00; H01S5/10; H01S5/1071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A semiconductor ring laser apparatus for detecting angular rotation comprising: (a) a semiconductor laser element having electrical terminals and optical terminals; (b) electrical power supply means coupled to said electrical terminals for applying a direct current voltage thereto; (c) optical means, optically coupled to said optical terminals of said semiconductor laser element, said optical means forming resonant ring optical paths in clockwise and counterclockwise directions for the light emitted by said semiconductor; and (d) detector means coupled to said electrical terminals for detecting only alternating current voltage variations thereon representative of the beat frequency caused by the rotation of said apparatus.
Claim 2
Dependent Claim
101 words
A semiconductor ring laser apparatus for detecting angular rotation comprising: (a) a semiconductor laser element having electrical terminals and optical terminals; (b) electrical power supply means coupled to said electrical terminals for applying a direct current voltage thereto; (c) optical means, optically coupled to said optical terminals of said semiconductor laser element, said optical means forming resonant ring optical paths in clockwise and counterclockwise directions for the light emitted by said semiconductor; and (d) detector means coupled to said electrical terminals for detecting only alternating current voltage variations thereon representative of the beat frequency caused by the rotation of said apparatus.
Claim 3
Dependent Claim
21 words
A semiconductor ring laser apparatus as set forth in claim 1 wherein said detector means include a direct current blocking capacitor.
Claim 4
Dependent Claim
40 words
A semiconductor ring laser apparatus as set forth in claim 1 wherein said optical means comprises a plurality of mirrors positioned with respect to said semiconductor laser element for reflecting the light emitted thereby along said resonant ring optical path.
Claim 5
Dependent Claim
33 words
A semiconductor ring laser apparatus as set forth in claim 1 wherein said optical means comprises an optical fiber means shaped to form at least a portion of said resonant ring optical path.
Claim 6
Dependent Claim
21 words
A semiconductor ring laser apparatus as set forth in claim 4 wherein said optical fiber means contacts said semiconductor laser element.
References Cited (Backward Citations)
DE2852614A1
Cited
US4258336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |