Abstract
A multi-configuration collimator is designed to test high precision optical instruments. Satellite imagers and solar concentrators are main candidates to be tested with this collimator. By using different measurement configurations, errors from a single test setup can be avoided. The performance of the collimator must be better than the equipment to be tested. This necessity requires the development of a highly precise instrument with a stable mechanical structure and high quality optical components. During polishing and metrology of optical mirrors, repeatability is obtained by the application of opto-mechanical principles to the mirror holders. Finite element analyses are performed to simulate gravity induced deformations, assembly tolerances and thermal variations. To understand the disturbances to the ideal WFE, variations are imported to optical software environment with the help of Zernike polynomials. In the production phase, surface qualities of the mirrors are measured by using computer generated holograms and an interferometric setup. Design, manufacturing and integration of the collimator are explained in detail.
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