A compact spectral camera for VIS-NIR imaging

This paper describes the design of a spectro-photo/radio-metric camera, that can be used in both portable and in-situ applications, whose compactness is made possible by a suitable image spectral scanning scheme based on a Linearly Variable Filter (LVF). Such filter is able to operate continuously from 400 nm to 2500 nm, allowing the hyper-spectral imaging from visible to near infrared. In traditional scanners the whole apparatus is moved along a path as long as the scene, whereas in this instrument the camera body is still and the LVF it is the only moving part. This solution allows a compact design and an easily portable instrument.

本文阐述了一款光谱光度与射电光度相机的设计方案，该相机可应用于便携式作业与原位检测场景，其结构紧凑性得益于一种基于线性可变滤波器（Linearly Variable Filter，LVF）的适配性图像光谱扫描方案。该滤波器可在400 nm至2500 nm的全波段范围内连续工作，支持可见光至近红外波段的高光谱成像。传统光谱扫描仪需将整套设备沿与待扫描场景长度相当的路径移动，而本仪器的相机机身保持静止，仅LVF为唯一运动部件。该方案可实现结构紧凑且便于携带的仪器设计。