JunMultiLED

Introduction

Multispectral imaging has enabled identification and analysis of targets across sectors, from agriculture to defense. This project focuses on the practical engineering-related aspects of creating an illumination system for future use in a portable multispectral imager. Specifically, this work describes efforts to characterize and evaluate the non-uniformity of high-power LEDs for this illumination system, as well as efforts to mitigate the associated challenges from running such a system.

Background

Photographers use LED-based ring lights to control illumination of a target. These ring lights take the form of an annulus with an inner radius sufficiently large enough to accommodate a camera lens. One example of such a product is shown below:

Figure

The illumination system for the multispectral imager will have a similar form factor to the above figure in order to enhance the uniformity of the output light.