COUNTER-COUNTER OPTICAL DEVICE (U)
Assignee
US Government
Filed as: UNITED STATES OF AMERICA, THE, AS REPRESENTED BY THE SECRETARY OF THE ARMY
Filed
Apr 13, 1984
Granted
Jun 29, 1999
Location
SPRINGFIELD VA US
Abstract
Two Fabry-Perot interference filters are used as tandum polarizers for a h-power laser beam counter measure in an optical scene. The scene radiation is directed on one polarizer; one plane of polarization of the laser beam is transmitted thereby and the other scene radiation is reflected to the other polarizer. The other polarizer transmits the other plane of polarization of the laser beam and reflects the other scene radiation to a photodetector, such as an image intensifier, infrared imager, television camera tube, or a human eye. The laser beam transmitted by the polarizers is trapped by absorbers and cannot harm the photodetector.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 12, 1986
Rescinded
Feb 12, 1998
Duration
11 years, 11 months
Inventor
- 1AUBREY J. DUNN
Technology Domains
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Record Details
- Patent number
- US 5917654
- Application
- 06611223
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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