High-sensitivity infrared detector and an infrared camera using such a detector
US5309230A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Sep 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/768
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high-sensity infrared detector system includes circuitry for summing the luminance values of flux received by the photosensitive cells in a detection matrix, these values being read in succession by a CCD read circuit at a frame rate and then converted to select adding operations applied to match the characteristics of a detector scan. An accumulator consists of an integrator having a multiplier connected to a memory containing sets of coefficients, each coefficient having two possible values and each value indicating a type of addition--with or without a cell shift. Secondly, an accumulator is provided to sum the luminance values following a defined scheme. A scanning system outputs data concerning the scan characteristics to detector selection circuits to select a set of coefficients from memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.