Mid-infrared upconversion based hyperspectral imaging

Saher Junaid, Jan Tomko, Mykhaylo P. Semtsiv, Jan Kischkat, W. Ted Masselink, Christian Pedersen, Peter Tidemand-Lichtenberg
2018 Optics Express  
Mid-infrared hyperspectral imaging has in the past decade emerged as a promising tool for medical diagnostics. In this work, nonlinear frequency upconversion based hyperspectral imaging in the 6 to 8 µm spectral range is presented for the first time, using both broadband globar and narrowband quantum cascade laser illumination. AgGaS 2 is used as the nonlinear medium for sum frequency generation using a 1064 nm mixing laser. Angular scanning of the nonlinear crystal provides broad spectral
more » ... broad spectral coverage at every spatial position in the image. This study demonstrates the retrieval of series of monochromatic images acquired by a silicon based CCD camera, using both broadband and narrowband illumination and a comparison is made between the two illumination sources for hyperspectral imaging.
doi:10.1364/oe.26.002203 pmid:29401760 fatcat:hvqvd5yanbdtpjtoy3y7rp62h4