US4105339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azimuth monitoring system
Assignee: United States Department of the Air Force
•
Filing: 1977-01-24
•
Granted: 1978-08-08
•
Expires: 1997-01-24
Abstract
Abstract A system for monitoring changes in azimuth due to shifts in geological features of the earth's surface, using a collimated laser beam which is split and reflected from a plane mirror and a prismatic mirror to target area showing translational and rotational changes in the mirrors location. The beam is directed to a second pair of mirrors at an angle to the beam which will verify the location movement, source or target.
Inventors
- 👤 Theodore E. Wirtanen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:15
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/002; G01B; G01B11/00; G01B11/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A system for monitoring changes in azimuth between widely separated points comprising: a source for a beam of coherent radiation; means for collimating said beam, beam splitting means for dividing said beam into a plurality of parallel beams; mirror means for reflecting each of said plurality of beams, including a plane mirror for measuring rotational movement and a prismatic reflector for measuring translatory movement; photosensitive target means for receiving each of said beams, and recording means for receiving the output of said target means.
Claim 2
Independent Claim
84 words
A system for monitoring changes in azimuth between widely separated points comprising: a source for a beam of coherent radiation; means for collimating said beam, beam splitting means for dividing said beam into a plurality of parallel beams; mirror means for reflecting each of said plurality of beams, including a plane mirror for measuring rotational movement and a prismatic reflector for measuring translatory movement; photosensitive target means for receiving each of said beams, and recording means for receiving the output of said target means.
Claim 3
Dependent Claim
21 words
A system for monitoring changes in azimuth according to claim 1 wherein said photosensitive target means is a junction barrier array.
Claim 4
Dependent Claim
21 words
A system for monitoring changes in azimuth according to claim 1 wherein said photosensitive target means is a junction barrier array.
Claim 5
Dependent Claim
62 words
A system for monitoring changes in azimuth according to claim 1 further including a first removable beam reflective mirror positioned between said source and said mirror means and at proscribed angle thereto, and a second mirror means positioned to receive the beam reflected from said removable mirror and direct the beam to the phosensitive target means by way of said removable mirror.
Claim 6
Dependent Claim
32 words
A system for monitoring changes in azimuth according to claim 4 wherein the second mirror means includes a plane mirror for measuring rotational movement and a primatic reflector for measuring translatory movement.
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) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |