US3715599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical system for controlling the attitude of a stage mounted on a carriage sliding along a parallel bench
Assignee: Thales SA
•
Filing: 1971-04-20
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Granted: 1973-02-06
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Expires: 1991-04-20
Abstract
Abstract Electro-optical system for controlling the attitude of a stage mounted on a carriage sliding along a parallel bench. The system in accordance with the invention corrects ''''yaw'''' defects on the part of the moving element sliding along the bench. To this end a beam of radiant energy supplies the directional reference and electromechanical transducers are used for controlling the attitude of the stage with respect to this optical reference.
Inventors
- 👤 R Marcy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:43
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70691; G03F7/70716; G01; G01B; G01B11/00; G01B11/02; G01B9/00; G01B9/02; G01B9/02015; G01B9/02023; G01D; G01D5/00; G01D5/26; G01D5/266
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
Electro-optical system for controlling the attitude of a stage mounted on a carriage sliding along a parallel bench having a translation axis, comprising : means for emitting at least one beam of radiant energy parallel to said axis, means integral with said stage for detecting said energy and means for displacing said stage with respect to said carriage; said energy detection means including two semi-reflecting faces providing along two optical paths perpendicular to said beam and located within a plane containing said axis, first and second reflected portions of the energy of said beam ; said energy detection means further including at the ends of said paths first and second photoelectric detectors delivering error signals upon reception of said reflected energy portions; said displacing means including at least two electro-mechanical transducers capable of displacing said stage in a direction parallel to said plane and means for feeding back said error signals to said electro-mechanical transducers.
Claim 2
Dependent Claim
155 words
Electro-optical system for controlling the attitude of a stage mounted on a carriage sliding along a parallel bench having a translation axis, comprising : means for emitting at least one beam of radiant energy parallel to said axis, means integral with said stage for detecting said energy and means for displacing said stage with respect to said carriage; said energy detection means including two semi-reflecting faces providing along two optical paths perpendicular to said beam and located within a plane containing said axis, first and second reflected portions of the energy of said beam ; said energy detection means further including at the ends of said paths first and second photoelectric detectors delivering error signals upon reception of said reflected energy portions; said displacing means including at least two electro-mechanical transducers capable of displacing said stage in a direction parallel to said plane and means for feeding back said error signals to said electro-mechanical transducers.
Claim 3
Dependent Claim
155 words
Electro-optical system for controlling the attitude of a stage mounted on a carriage sliding along a parallel bench having a translation axis, comprising : means for emitting at least one beam of radiant energy parallel to said axis, means integral with said stage for detecting said energy and means for displacing said stage with respect to said carriage; said energy detection means including two semi-reflecting faces providing along two optical paths perpendicular to said beam and located within a plane containing said axis, first and second reflected portions of the energy of said beam ; said energy detection means further including at the ends of said paths first and second photoelectric detectors delivering error signals upon reception of said reflected energy portions; said displacing means including at least two electro-mechanical transducers capable of displacing said stage in a direction parallel to said plane and means for feeding back said error signals to said electromechanical transducers.
Claim 4
Dependent Claim
155 words
Electro-optical system for controlling the attitude of a stage mounted on a carriage sliding along a parallel bench having a translation axis, comprising : means for emitting at least one beam of radiant energy parallel to said axis, means integral with said stage for detecting said energy and means for displacing said stage with respect to said carriage; said energy detection means including two semi-reflecting faces providing along two optical paths perpendicular to said beam and located within a plane containing said axis, first and second reflected portions of the energy of said beam ; said energy detection means further including at the ends of said paths first and second photoelectric detectors delivering error signals upon reception of said reflected energy portions; said displacing means including at least two electro-mechanical transducers capable of displacing said stage in a direction parallel to said plane and means for feeding back said error signals to said electromechanical transducers.
Claim 5
Dependent Claim
27 words
Electro-optical system as claimed in claim 1, wherein each of said photoelectric detectors comprises at least two adjacent sectors having a boundary line perpendicular to said plane.
Claim 6
Dependent Claim
85 words
Electro-optical system as claimed in claim 1, wherein said emission means comprise : a source of radiant energy and beam splitting means for supplying said one beam and a further beam parallel to said beam ; said energy detection means further comprising a third photoelectric detector integral with said stage and positioned for intercepting said further beam ; said displacing means further comprising a third electro-mechanical transducer controlled by said third photoelectric detector for rotating said stage about an axis parallel to said translation axis.
Claim 7
Dependent Claim
34 words
Electro-optical system as claimed in claim 1, wherein said emission means comprise : a source of radiant energy located at one end of said bench and means for controlling the direction of said beam.
Claim 8
Dependent Claim
44 words
Electro-optical system as claimed in claim 1, wherein said direction controlling means include deviator means having a control input for deviating said beam at said one end and a photoelectric transducer positioned at the other end of said bench for receiving said deviated beam.
Claim 9
Dependent Claim
21 words
Electro-optical system as claimed in claim 1, wherein said means for emitting a beam of radiant energy comprise a laser source.
Claim 10
Dependent Claim
19 words
Electro-optical system as claimed in claim 1, wherein each of said electro-mechanical transducers comprises a stack of piezoelectrical ceramics.
References Cited (Backward Citations)
US2853917A
Cited
US3213282A
Cited
US3114842A
Cited
US3434787A
Cited
US3588254A
Cited
US3573849A
Cited
US3574292A
Cited
US3622244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |