Infrared detector dark background value calculation method, device, equipment, system and medium

Abstract

The embodiment of the invention discloses a system, method, device and equipment for calculating a dark background value of an infrared detector and a computer readable storage medium. The system comprises a slit, an infrared detector and an infrared detector dark background value calculator, wherein the image length of the slit is less than the space dimension length of the infrared detector, theinfrared detector is divided into a first light insensitive region, a second light insensitive region and a light sensitive region located between the first light insensitive region and the second light insensitive region. The detector sends collected dark pixel data of the working state of an infrared spectrometer to the infrared detector dark background value calculator so as to enable the infrared detector dark background value calculator to call a linear relation between light sensitive pixel DN values and dark pixel DN values under the same working mode according to the dark pixel data and calculate the dark background value of light sensitive pixels. The linear relation is calculated according to the light sensitive pixel DN values and the dark pixel DN values of multiple groups ofdark pixel pairs in the light sensitive region, and the dark pixels are uniformly and symmetrically distributed in the light insensitive region. The technical scheme provided by the invention improvesthe accuracy of calculating the dark background value of the infrared detector.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of infrared spectrometers, in particular to a method, device, equipment, system and computer-readable storage medium for calculating dark background values ​​of infrared detectors. Background technique [0002] Infrared spectrometer is a device that can receive light in the infrared band, an infrared detector made of mercury cadmium telluride and other materials, and can measure the intensity of different wavelength positions of the incident infrared light spectrum. In the actual working process of the infrared spectrometer, since the infrared detector receives the input photons of the optical system and the dark background photons at the same time, it is necessary to subtract the dark background value in practical applications to use it as the actual optical signal, that is, the infrared spectrometer needs to subtract when calculating the spectrum. Dark background value, get the DN val...

AI Technical Summary

Problems solved by technology

[0005] The internal temperature environment and focal plane temperature of the infrared spectrometer will change with time, causing the dark background of the infrared detector to change with time, that is, the dark background of the infrared detector will change due to the change of the ambient temperature and the heat generated during the work of the focal plane electronics. The background DN value increases, and the dark background of the infrared detector does not change much in a short period of time. However, when the infrared spectrometer works for a long time, the dark background DN value will increase with time. The dark background value before or after the test Obviously, the difference from the actual dark background value will become larger and larger, the value of dark background drift is large, and the change trend is not easy to predict, and the error is large in long-term measurement scenarios.

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