Device for detecting infrared radiation with bolometric detectors
US7928387B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2008 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | May 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/672
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for detecting infrared radiation comprising an array of bolometric detectors which are sensitive to incident radiation and are referred to as “active” and a bolometer which is insensitive to said radiation and is referred to as “blind” formed on a substrate in which a read circuit is produced for sequentially addressing each of the rows of detectors of the array, each of the active bolometers in a single row being biased simultaneously. The read circuit also comprises means of producing a reference current (Iref) based on the blind bolometer; means of simultaneously copying the reference current (Iref) for each column of the array; and a plurality of current integrators, each associated with one column of the array and each designed to integrate the difference between the current flowing through the active bolometer of the row which is currently being read and said thus copied reference current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.