US3597088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser gyrometer
Assignee: Alcatel Lucent SAS
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Filing: 1969-05-06
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Granted: 1971-08-03
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Expires: 1989-05-06
Abstract
Abstract A laser gyrometer which is characterized in that it comprises means for detecting the power of each of the propagating waves, means for detecting the beat frequency of said propagating waves, and an electronic circuit introducing corrections with respect to the signal supplied by said means for detecting the beat frequency from the data furnished by said means for detecting the power of each of the waves.
Inventors
- 👤 Jean-Michel Catherin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:21
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/661; G01C19/662
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A laser gyrometer comprising: a ring laser combination including a closed polygonal optical path, a laser propagating first and second waves in opposite directions along said optical path and first detection means for detecting the beat frequency between said first and second waves circulating in said optical path, second detection means for detecting the power of each of said first and second propagating waves, and control means responsive to the output of said second detection means for introducing correction to the signal delivered by said first means, said control means providing an output in the form of: wherein Delta f is the output of said control means, A, B, and C are constants, Delta f is the output of said first detection means, and I1 and I2 are the powers of said first and second waves, respectively derived from said second detection means.
Claim 2
Dependent Claim
143 words
A laser gyrometer comprising: a ring laser combination including a closed polygonal optical path, a laser propagating first and second waves in opposite directions along said optical path and first detection means for detecting the beat frequency between said first and second waves circulating in said optical path, second detection means for detecting the power of each of said first and second propagating waves, and control means responsive to the output of said second detection means for introducing correction to the signal delivered by said first means, said control means providing an output in the form of: wherein Delta f is the output of said control means, A, B, and C are constants, Delta f is the output of said first detection means, and I1 and I2 are the powers of said first and second waves, respectively derived from said second detection means.
Claim 3
Dependent Claim
34 words
A laser gyrometer as defined in claim 1 wherein said second detector means includes first and second detectors coupled to said optical path for detecting the power of said first and second waves, respectively.
Claim 4
Dependent Claim
74 words
A laser gyrometer as defined in claim 2 wherein said control means includes an adder connected to the outputs of said first and second detectors for producing the signal I1+I2, a first frequency converter connected to the output of said first detection means for producing the signal AC/2 Delta f and a second frequency converter connected to the output of said adder and said first frequency converter for producing the signal AC/2 Delta f(I1+I2).
Claim 5
Dependent Claim
34 words
A laser gyrometer as defined in claim 3 wherein said control means further includes a third frequency converter connected to the output of said first detection means for producing the signal (1-AB) Delta f.
Claim 6
Dependent Claim
55 words
A laser gyrometer as defined in claim 4 wherein said control means further includes first and second counters connected to the outputs of said second and third frequency converters, respectively, a clock source applying clock signals to said first and second counters, and a subtractor for subtracting the outputs of said first and second counters.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |