Patent US3877845A successfully refreshed from Google Patents.
Patent US3756687A successfully refreshed from Google Patents.
US3756687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual gyro mechanically coupled image motion compensator having non-linear damping means
Assignee: Dynasciences Corp
•
Filing: 1971-09-23
•
Granted: 1973-09-04
•
Expires: 1991-09-23
Abstract
Abstract An image motion compensator for optical systems employs a variable-angle fluid medium encapsulated between spaced transparent elements pivotally disposed about mutually perpendicular axes. A pair of gyros whose axes are orthagonal to each other are mechanically coupled to the respective transparent elements to avoid cross coupling of image motion. Damping is nonlinear - minimal about the center of precession and increasing exponentially with increase of precession angle. Restoring torque is applied magnetically to precession axis by means of opposed permanent magnets.
Inventors
- 👤 I Shin
- 👤 J Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:07
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/64; G02B27/646; G01; G01C; G01C19/00; G01C19/02; G02B27/644
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
208 words
An image motion compensator for an optical system subject to random angular motion comprising : a variable angle fluid wedge including a pair of transparent elements and a fluid medium encapsulated therebetween, said transparent elements being pivotally supported along mutually perpendicular axes in quadrature to the axis of collimation of the optical system, first gyro means mechanically coupled to one of said transparent elements for effecting rotation of said one transparent element about the pivotal axis thereof in response to angular motion in a first direction, said first gyro means including means for effecting non-linear damping about the precessional axis thereof, second gyro means mechanically coupled to the other of said transparent elements for effecting rotation of the other of said transparent elements about the pivotal axis thereof in response to angular motion in a second direction having a component normal to said first direction, said second gyro means including means for effecting non-linear damping about an axis of precession orthagonal to the axis of precession of said first gyro means, and means for effecting restoring torque to the axis of precession of each of said gyro means, each of said means for effecting non-linear damping being selfregulating and increasing in damping coefficient with increasing angle of precession.
Claim 2
Dependent Claim
208 words
An image motion compensator for an optical system subject to random angular motion comprising : a variable angle fluid wedge including a pair of transparent elements and a fluid medium encapsulated therebetween, said transparent elements being pivotally supported along mutually perpendicular axes in quadrature to the axis of collimation of the optical system, first gyro means mechanically coupled to one of said transparent elements for effecting rotation of said one transparent element about the pivotal axis thereof in response to angular motion in a first direction, said first gyro means including means for effecting non-linear damping about the precessional axis thereof, second gyro means mechanically coupled to the other of said transparent elements for effecting rotation of the other of said transparent elements about the pivotal axis thereof in response to angular motion in a second direction having a component normal to said first direction, said second gyro means including means for effecting non-linear damping about an axis of precession orthagonal to the axis of precession of said first gyro means, and means for effecting restoring torque to the axis of precession of each of said gyro means, each of said means for effecting non-linear damping being selfregulating and increasing in damping coefficient with increasing angle of precession.
Claim 3
Dependent Claim
42 words
The image motion compensator of claim 1 wherein said means for effecting non-linear damping and said means for effecting restoring torque in each of said gyro means have characteristics which increase exponentially with increasing correctional angles of said variable angle fluid wedge.
Claim 4
Dependent Claim
47 words
The image motion compensator of claim 2 wherein said means for effecting non-linear damping in each gyro means comprises a pair of pivotally supported dashpots, and said means for effecting restoring torque in each gyro means constitutes pairs of magnets having opposing poles of the same polarity.
Claim 5
Dependent Claim
23 words
The image motion compensator Of claim 1 wherein each of said means for effecting non-linear damping comprises a dashpot including a tapered piston.
Claim 6
Dependent Claim
24 words
The image motion compensator of claim 1 wherein each of said means for effecting non-linear damping comprises a dashpot including a porous cylindrical wall.
Claim 7
Dependent Claim
16 words
The image motion compensator of claim 1 wherein said means for effecting restoring torque comprises magnets.
Claim 8
Dependent Claim
69 words
The invention of claim 1 wherein said means for effecting non-linear damping and said means for effecting restoring torque in each of said gyros are so constructed and arranged that when the spinning mass of the gyro is in neutral position characteristics of a free gyro are obtained, and as the spinning mass precesses away from neutral position exponentially increasing restoring torques produce characteristics of a single axis gyro.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |