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. 2017 Jan 3;7:39893. doi: 10.1038/srep39893

Figure 1. Experimental setup for the lens-free analysis of CSF clinical specimen.

Figure 1

(a) Schematic of the optical setup. The multispectral illumination is provided by a multi-quadrant RGB LED coupled to a 150 μm pinhole through a 60° diffuser. When the quadrant RGB LED sequentially illuminates the sample, the CMOS sensor records three red, green and blue holograms. (b) Picture of the prototype used in the proof of concept study. The device cover featuring the RGB illumination is shown open in the picture.