Bolometer with heat feedback
US8368022B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2008 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Jul 1, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/671
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bolometer comprising an outer surface for the thermal absorption of incident radiation in thermal contact with a radiation measurement element having a variable resistance (R) depending on the temperature, the element being in a heat feedback loop comprising a corrector for applying a heating power to a resistive heating means in order to maintain the temperature of the resistor equal to a setpoint temperature (Tref). According to the invention, the resistive heating means comprises the element, the corrector is designed to generate a frequency component (S1) of the heating power, which is applied to a coupling means provided between the element and the corrector in order to apply a DC-free signal to the element, a coupling means, separate from the means, is provided between the element and a DC bias means in order to maintain the resistor at a prescribed continuous operation point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.