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Interferometric testing of steep cylindrical surfaces with on-axis CGHs
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We present a new approach for testing cylindrical optical surfaces using a Null-test. We suggest using a Co mp uter Ge nerated Hologra m (CG H) in co mbi natio n w ith a Trans mission Sp here. It is shown that in such an optical layout the period of the diffractive structure is larger than in the case of a conventional scheme using a collimated beam. Therefore, this kind of hologram enables the test of cylinder surfaces with higher numerical apertures.
diffractive optical elements
\ computer-generated hologram (cgh)
\ laser writing
\ methods for doe fabrication
\ cylinder metrology surface testing
Similar articles in the section Electrical engineering
Short address: https://sciup.org/14059598
IDS: 14059598 | DOI: 10.18287/2412-6179-2016-40-5-625-628
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