We demonstrate a hand-held scanner that acquires two-dimensional images with up to 40 distinct wavelength channels. Light is collected through a combined slit and illumination assembly, dispersed by a diffraction grating film and analyzed using a webcam. Custom software is used to track the scanner motion and build the hyperspectral image data in real time. We tested the performance on printed fluorescent ink patterns that are of interest for security printing applications, and obtained results that are consistent with spectra acquired using a laboratory-grade spectrofluorometer.
Charles Santori, James Stasiak, Garry Hinch, Raymond G. Beausoleil, "A Low-Cost Hyperspectral Scanner for Security Printing" in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP31), 2015, pp 380 - 382, https://doi.org/10.2352/ISSN.2169-4451.2015.31.1.art00083_1