| 主权项 |
1. IR measuring instrument (1) with an IR radiation detector (2) with at least one sensor element (29) which is sensitive to infrared radiation, wherein the at least one sensor element (29) is a bolometer and is connected to an evaluation electronics (9, 11, 30), and by means of said evaluation electronics (9, 11, 30), a first output signal (12) from the at least one sensor element (29) can be detected as a function of an integration time, the first output signal (12) representing ohmic resistance of the at least one sensor element (29), characterized in that the IR radiation detector (2) is thermally coupled to at least one temperature sensor (16) and in that means (11, 20, 21) are provided for influencing the integration time in response to a second output signal (17, 27) from the at least one temperature sensor (16) to at least partly compensate a temperature-induced drift of the IR radiation detector (2) wherein the first output signal (12) is variable with respect to a particular incident radiation based on the integration time thereof, and temperature present at the sensor element (29) is detected by the at least one temperature sensor (16) and used for varying the integration time which at least partly compensates for the influence of temperature fluctuations on the sensitivity of the at least one sensor element (29). |
