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. 2017 Dec 21;7:18011. doi: 10.1038/s41598-017-18147-7

Figure 5.

Figure 5

Optical microscopy (a), scanning electron microscopy (b) and atomic force microscopy (c,d) of a PMMA phase-only CGH for pixel size: 3.125 × 3.125 μm2. CGH total size: 1.250 × 1.250 mm2. Working wavelength λ = 632.8 nm. 16 phase levels.