Dual-band infrared remote sensing system with combined long-wave infrared imaging and mid-wave infrared spectral analysis

Abstract

We present a new optical system for infrared (IR) image-spectrum integration remote sensing. The purpose to develop this instrument is to find the key spectral characteristics of typical hot target and to explore a new intelligence fusion method for the recognition. When mounted on a two-dimensional rotation stage, it can track the suspected target by image processing, and then get its spectrum to do recognition. It is a dual-band system with long-wave infrared (LWIR) imaging and mid-wave infrared (MWIR) spectrum. An IR dichroic beamsplitter is used to divide wideband incident infrared into LWIR and MWIR. Compared to traditional infrared combined imaging and spectral-analysis instruments, it yields higher sensitivity for measuring the IR spectrum. The sensors for imaging and spectrum detection are separate, so high spatial resolution, frame rate, and spectrum resolution can all be obtained simultaneously.

An Infrared Scanning and Tracking System for Detecting Mid-Wave Infrared Spectral Characteristics of Moving Targets

“…Aside from the structure form described above, there are two forms of scanning system. 17,18 Firstly, the multispectral scanner is installed on a large 2D scanning platform. Scene scanning is achieved to obtain multispectral remote sensing image information via the deflection and tilt of the platform.…”

“…The acquired image and spectrum data are sent to the processing-controlling unit, whose main functions are data processing, feature extraction, target identification, and controlling the 2D scanning mirror to track targets of interest in the scene. For more specifications about the dual-band IR lens, IRcube, and FPA sensor, please refer to Zheng Fang et al 19…”