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. 2015 Jul 20;15(7):17649–17665. doi: 10.3390/s150717649

Figure 3.

Figure 3

Early evolution of IRIS: (left) First generation IRIS setup which used a tunable laser and spanned half of an optical table; (center) A first generation prototype produced by Zoiray Technologies; (right) A second generation IRIS prototype with multi-color LED sources.