System for detecting a hot spot in an infra-red detected landscape
US5212384A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 1991 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Feb 5, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/789
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for detecting a hot spot in an infra-red detected landscape and which co-operates with a landscape scan system for converging towards an infra-red detector circuit a main beam emanating seriatim from various regions of the landscape; the system being characterized in that it comprises: optical filter means for preparing from the main beam consecutively in time at least two secondary beams each representing a part of the main beam spectrum; and a signal comparison circuit having an input connected to the detector circuit and whose output is the output of the system and which serves to compare the detector circuit signals corresponding to the various received secondary beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.