A Mid-wave Infrared Hadamard Aperture Coded Spectral High Frame Rate Imaging Circuit

Abstract

The invention discloses a mid-wave infrared Hadamard aperture coding spectrum high-frame-rate imaging circuit, which can achieve higher frame-rate output under the condition that the frame frequency of the current mid-wave infrared detector is relatively low. The spectral high frame rate imaging circuit includes a power supply circuit, a medium wave infrared detector, a detector interface circuit and a timing and signal processor circuit connected in sequence; the detector interface circuit is provided with a level conversion unit and a gain amplification unit; The timing and signal processor circuit is provided with an FPGA unit, an AD conversion unit and an image data output interface unit; the medium-wave infrared detector is configured as an "any range windowing" mode, and the obtained analog signal is passed through the gain amplifying unit. After conditioning, it is converted into a high-frequency sampling digital signal by the AD conversion unit, which is received by the FPGA unit; the FPGA unit outputs image data through the image data output interface unit.

Description

technical field [0001] The invention relates to a mid-wave infrared Hadamard aperture coding spectral imaging circuit. Background technique [0002] Spectral imaging technology integrates spectral technology and imaging technology. It began in the 1980s. It can not only achieve target imaging but also measure target spectral characteristics, realize comprehensive detection and identification of target characteristics, and be used in resource detection, environmental monitoring and space. Target recognition and other fields have advantages that other remote sensing technologies cannot replace. [0003] The theoretical basis of the Hadamard Transform Spectral Imager (also known as the Hadamard Aperture Coded Spectral Imager) comes from the French mathematician Jacques Hadamard, who proposed a weight design method, which makes the measurement error obtained after measuring a set of targets. Optimum control and lowering. This type of spectral imager has the characteristics of ...

AI Technical Summary

Problems solved by technology

[0006] The mid-wave infrared (3-5μm band) Hadamard aperture-coded spectral imager is quite special, mainly solving the problem of large-scale detectors and low system signal-to-noise ratio in sub-aperture or sub-field of view staring imaging solutions. resolution, high spatial resolution and large field of view, but currently applicable detectors have a low frame rate, and the corresponding mid-wave infrared Hadamard aperture-coded spectral imaging circuit can only reach 40fps, which cannot meet the high frame rate spectral data Requirements Requirements for Cube Acquisition

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