Real-time background deduction method for target radiometry

Abstract

The invention discloses a real-time background deduction method for target radiometry. A target, a background, an optical system, a scanning vibration lens, a first photoelectric detector, a second photoelectric detector, a signal processing system and a computer are used for achieving the real-time deduction method, wherein the optical system is used for imaging the target; when the scanning vibration lens vibrates, the target is imaged on the first photoelectric detector and the second photoelectric detector in turn; when the target is imaged on the first photoelectric detector, the background is imaged on the second photoelectric detector; when the target is imaged on the second photoelectric detector, the background is imaged on the first photoelectric detector; and the signal processing system is used for subtracting the signals of the first photoelectric detector and the second photoelectric detector in real time, thereby efficiently eliminating the influence of the background on the target radiometry in real time and acquiring an accurate target radiometry value. Compared with an afterward background deduction method, the real-time background deduction method for the target radiometry provided by the invention has the advantages that the instantaneity is better and the change of target radiation intensity can be reflected in real time.

Description

technical field [0001] The invention relates to a measurement technology, in particular to a method for real-time background subtraction of target radiation measurement. Background technique [0002] The radiation characteristics of the target are important data to characterize the target, and it is of great significance to measure it accurately. One of the difficulties in measuring radiation characteristics of targets is the presence of background radiation. The presence of background radiation can affect the accuracy of target radiation measurements. Especially for targets with low signal-to-noise ratio, the intensity of background radiation is even far greater than the signal intensity of the target itself, which will make it almost impossible to measure the target's radiation. Therefore, the subtraction of background radiation has become one of the key technologies that must be solved in target radiation measurement. [0003] For the subtraction of background radiatio...

AI Technical Summary

Problems solved by technology

[0003] For the deduction of background radiation, the previous solution is to deduct after the fact, but if the background changes greatly, it will affect the accuracy of target radiation measurement

Especially in the case of large background and small target, slight changes or instability of the background will have a great impact on the measurement results, and cause inaccurate target radiation measurement

Another defect of the post-event background subtraction method used in the target radiation measurement is that the real-time performance is poor, and the background radiation cannot be deducted in time, so it cannot reflect the change of the target radiation intensity in real time.

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