基于对称楔形干涉腔的高光谱成像方法

Hyperspectral Imaging Based on Symmetric Wedgy Interferometric Cavity

高光谱成像技术在众多领域中具有广泛的应用潜力,仪器的轻小型化能够助力该技术的推广。为探索新的干涉高光谱成像技术方案,研究了一种新型的基于对称楔形干涉腔的高光谱成像方法。通过在成像系统中加入对称楔形干涉器,实现干涉光程差与视场角的关联调制。通过分析系统的工作原理,设计了系统的干涉成像光路模型,并对干涉腔楔角、反射率、成像物镜等主要参数和成像推扫方式进行了讨论分析,采用Zemax光学设计软件对干涉成像光路进行了仿真研究。研制了原理样机,对激光光源和实际场景目标进行了光谱成像实验,得到了较好的实验结果。研究表明,该高光谱成像方法不仅具有高光通量、高光谱分辨率的优点,而且能够有效实现仪器的轻小型化。

Interferometric hyperspectral imaging is a popular technology with wide application in many fields. Miniaturization of instrument is conducive to promotion of the imaging technology. In order to explore a new technical scheme, a new method of interferometric hyperspectral imaging based on symmetric wedgy cavity is researched. A symmetric wedgy cavity is inserted into the imaging system to obtain the modulating relationship between optical path difference and field angle. By analyzing the working principle of the system, a model of the imaging system is designed while the major parameters such as wedge angle of interferometric cavity, reflectance, object lens, and the push-broom mode are discussed. Moreover, the proposed method is verified by the simulation with Zemax. A prototype is developed and good experimental results of lasers and actual scene objects are obtained. The research shows that besides high throughput and high spectral resolution, the advantage of miniaturization is also simultaneously achieved in this method.