FIELD: physics.
SUBSTANCE: apparatus has an array of bolometric detectors (2) which are sensitive to incident radiation and are called 'active', a bolometer (12) which is not sensitive to radiation and is called 'blind', formed on a substrate in which a reading circuit is formed for successive access to each row of detectors in the array, wherein each of the active bolometers in one row receives bias at the same time. The reading circuit also includes: means of generating reference current (Iref) based on the blind bolometer (12); means for simultaneous copying of the reference current (Iref) for each column of the array; multiple current integrators (19), each connected to one column of the array and capable of integrating the difference between current flowing through the active bolometer of the row which is read at that moment, and said reference current copies in the same way.
EFFECT: high accuracy.
5 cl, 3 dwg
