红外点元探测器扫描成像方法研究

Research on Infrared Point Element Detector Scanning Imaging Method

摘要:

针对传统红外面阵探测器成像存在分辨率低、视场范围窄、非均匀性的问题,提出一种基于红外点元探测器的扫描成像方法。该方法首先利用微型电机驱动扫描镜依次获取物体表面的红外热斑,经光学镜头聚焦到红外点元探测器,进行光电转换；然后经信号处理板采集、处理后生成红外灰度图像；最后利用多阈值分割的伪彩色映射模型,将灰度图像转换成伪彩色图像。实验结果表明:红外点元探测器扫描成像方法能够实现红外场景的大视场、高分辨率成像,且点元探测器加工制造简单,价格低廉,有效突破了传统大面阵成像的高昂成本限制,更加有利于红外成像技术的推广和应用。

Abstract:

Aiming at the problems of low resolution, narrow field of view and non-uniformity of traditional infrared array detector, a scanning imaging method based on infrared point detector was proposed. Firstly, a scanning mirror driven by a micro motor was used to obtain the infrared hot spots on the surface of the object, which were converged to the infrared point detector through the optical lens. Then the signal processing board collected and processed them to generate infrared grayscale image. Finally, a multi threshold segmentation pseudo-color mapping model was used to transform grayscale image into pseudo-color image. The experimental results show that the infrared point detector scanning imaging method can realize the large field of view and high-resolution imaging of the infrared scene, and the point detector has the advantages of simple manufacturing process and low cost. It effectively breaks the limitations of technical and cost constraints of the large planar array detector in the traditional high-resolution imaging system, and is more conducive to the promotion and application of the infrared imaging technology.