Interferometric testing of steep cylindrical surfaces with on-axis CGHs
A.G. Poleshchuk, R.K. Nasyrov, J.-M. Asfour

 

Institute of Automation and Electrometry, Russian Academy of Sciences, Novosibirsk, Russia,
Dioptic GmbH, Weinheim, Germany

Full text of article: English language.

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Abstract:
We present a new approach for testing cylindrical optical surfaces using a Null-test. We suggest using a Computer Generated Hologram (CGH) in combination with a Transmission Sphere. 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.

Keywords:
diffractive optical elements, computer-generated hologram (CGH), laser writing, methods for DOE fabrication, cylinder metrology surface testing.

Citation:
Poleshchuk AG, Nasyrov RK, Asfour J-M. Interferometric testing of steep cylindrical surfaces with on-axis CGHs. Computer Optics 2016; 40(5): 625-628. DOI: 10.18287/2412-6179-2016-40-5-625-628.

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