Shack-Hartmann wavefront sensors are commonly used in optical alignment, ophthalmology,
astronomy, adaptive optics and commercial optical testing. Wavefront error measurement yields
Zernike polynomials which provide useful data for alignment correction calculations.
In this thesis a practical alignment method of a helmet visor is proposed based on the wavefront error
measurements. The optical system is modeled in Zemax software in order to collect the Zernike
polynomial data necessary to relate the error measurements to the positioning of the visor. An
artificial neural network based computer program is designed and trained with the data obtained from
Zernike simulation in Zemax software and then the program is able to find how to invert the
misalignments in the system. The performance of this alignment correction method is compared with
the optical test setup measurements.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12615591/index.pdf |
| Date | 01 February 2013 |
| Creators | Adil, Fatime Zehra |
| Contributors | Konukseven, Erhan Ilhan |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | Access forbidden for 1 year |
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