System and device for recognition or IFF use
US4763361A · kind A · utility
31Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1986 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Feb 13, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The IFF System consists of an unpolarized light source like an infrared laser or a short wavelength radar. On a friendly target, a wire grid polarizer is mounted so that the polarization can be varied. Mounted to the back of the grid is a corner reflector which sends the signal right back on itself and utilizes the principle of optical enhancement so that the return signal is collomated and diffraction limited. A wire grid polarization analyzer is also mounted so as to be rotatable and is mounted in front of a detector for receiving signals reflected from the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.