Possible Application of Wavefront Coding to the LSST Page: 4 of 6
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A number of other examples can be found on the website7 of CDM Optics, a company that
specializes in wavefront coded optics consulting, simulation and licensing. It will not come as a
surprise that the principal authors of references 1 and 2 are founders of the company.
A
SB -s
C
Figure 2. PSFs of in-focus (left) and out-of -focus (right) point sources: (A) using conventional optics, (B) using
wave-front coded optics, raw image and (C) using wave-front coded optics, processed image. Images taken from
reference 1.
3. Possible Application to the LSST
Wavefront Coding requires the presence of a phase mask at a pupil in the imaging system.
Usually, the imaging system is designed such that it has a pupil somewhere with a manageable
diameter in order to limit the difficulty in fabricating the phase mask.
The current design of the LSST has only one true pupil, the entrance pupil, i.e. the primary
mirror. While it might be possible to polish a phase mask into the primary, I would consider that4
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Langeveld, Willy. Possible Application of Wavefront Coding to the LSST, report, June 30, 2006; [Menlo Park, California]. (https://digital.library.unt.edu/ark:/67531/metadc876392/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.