A pyramid wavefront sensor (PWFS) bench has been setup at the National Research
Council-Herzberg (Victoria, Canada) to investigate: the feasibility of a lenslet
based PWFS and a double roof prism based PWFS as alternatives to a classical
PWFS, as well as to test the proposed methodology for pyramid wavefront sensing
to be used in NFIRAOS for the Thirty Meter Telescope (TMT). Traditional PWFS
require shallow angles and strict apex tolerances, making them difficult to manufacture.
Lenslet arrays, on the other hand, are common optical components that can
be made to the desired specifications, thus making them readily available. A double
roof prism pyramid, also readily available, has been shown to optically equivalent
by optical designers. Characterizing these alternative pyramids, and understanding
how they differ from a traditional pyramid will allow for the PWFS to become more
widely used, especially in the laboratory setting. In this work, the response of the
SUSS microOptics 300-4.7 array and two ios Optics roof prisms are compared to a
double PWFS as well as an idealized PWFS. The evolution of the modulation and
dithering hardware, the system control configuration, and the relationship between
this system and NFIRAOS are also explored. / Graduate
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/7410 |
| Date | 20 July 2016 |
| Creators | van Kooten, Maaike |
| Contributors | Bradley, Colin |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | Available to the World Wide Web |
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