1. History and principles of Shack-Hartmann wavefront sensing,;Platt,2001
2. http://www.microfab.com/microlens-arrays
3. http://www.powerphotonic.com/product/lens-arrays/
4. http://www.suss-microoptics.com/media/downloads/SUSS-MicroOptics_Shack-Hartmann.pdf
5. A simple and effective algorithm for detection of arbitrary Hartmann–Shack patterns