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. 2016 Jul 29;6:30844. doi: 10.1038/srep30844

Figure 4. Illustration of PSF grid and USF chart imaging.

Figure 4

(a) PSF grid simulation by Zemax of our gonioscopy system integrated with axicon lens unit. (b) PSF grid simulation by Zemax of the gonioscopy system without axicon lens unit. (c) USAF test chart 1951, imaged by our gonioscopy system without and with axicon lens unit.