Bolometer circuitry and methods for difference imaging
US9958332B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2017 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Apr 10, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various techniques are disclosed for bolometer circuits and related methods for thermal imaging in a difference domain, where each pixel value represents a difference in incident IR radiation intensity between adjacent bolometers. For example, a bolometer circuit may include an array of bolometers each configured to generate a pixel signal in response to a bias and incident infrared radiation. Each column of the bolometer array may comprise an amplifier, a first plurality of switches each configured to selectively provide a supply voltage to a respective one of bolometers of the each column, a second plurality of switches each configured to selectively route a difference of the pixel signals of a respective adjacent pair of the bolometers of the each column to an input of the amplifier, and a third plurality of switches configured to selectively provide a common voltage to a respective one of the bolometers of the each column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.