Image plane moving stage for high precision multispectral imaging

This paper presents a solution to overcome longitudinal chromatic distortion typical of spectral imaging. Here, a short description of the experimental setup and smart multispectral imager for industrial applications is presented. The image system is composed of a filter wheel composed of 12 filters spanning from 400 nm until 950 nm with a 50 nm bandwidth (fwhm). Chromatic distortion on the system is explained in details, showing that a high precision moving image plane and an adequate image registration can overcome the aforementioned effects. Development and characterization of a high speed linear-moving-stage is shown subsequently. To conclude this work, a selection of applications exploring the advantages of such solution is presented.