Thermal scanning devices
US4315284A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Jul 18, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/33
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanning device is provided of the kind having optical elements which are rotated and/or oscillated to scan incident light across a detector array. By arranging for successive scans of a plurality of rows of detector elements to overlap, each line of picture information of a scene under surveillance is scanned at least twice during a complete monitoring of the scene, the corresponding detector array output signals being summed to assemble a plurality of summed signals in which there is coherent addition of picture information and incoherent addition of noise. The summed signals are processed into television format for display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.