Optronic heading deviation measurement system providing spatial and spectral discrimination of infrared light sources
US4849620A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Apr 3, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/781
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The system allows homing on a useful target to be obtained in the presence of considerable parasite sources, such as the sun, in the field of observation. It includes elements for the spatial and spectral discrimination of the infrared light sources, formed with a detector strip preceded by a fixed modulation grid, the uniaxial field scanning device, switchable electronic filtering, one band pass and the other low pass, and switching optical filtering, one with very narrow band and the other with wide band. The grid is preferably formed by herringbone patterned tracks. The narrow band filter may be centered towards 4.4 microns and the wide band filter covers 3 to 5 microns for providing homing of a missile by optical deviation heading measurement in a ground/air or sea/air defense system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.