Figure 2.

Holography of a USAF 1951 resolution target, group 7. The image area is 50 × 50 μm² (408 × 408 pixels) and the image is at z = 3μm from the hologram: (a) hologram; (b) amplitude; (c) wrapped phase image; (d) unwrapped phase image, (e) z-profile of optical thickness cross section and (f) 3D pseudocolor rendering of (d).