Interferometric asphere testing in a spherical test setup

Thomas Blümel; Markus Bosse

doi:10.1117/12.623529

19 October 2005 Interferometric asphere testing in a spherical test setup

Thomas Blümel, Markus Bosse

Proceedings Volume 5965, Optical Fabrication, Testing, and Metrology II; 596514 (2005) https://doi.org/10.1117/12.623529
Event: Optical Systems Design 2005, 2005, Jena, Germany

Abstract

Interferometric asphere testing is traditionally done using computer generated holograms (CGHs) as beam shaping optics. The great disadvantage of using CGHs is that each asphere requires its own unique CGH which is expensive and requires a certain delivery time. In many cases all you are interested in first off is a quick but rough sample conformity validation to investigate and test new asphere designs. We present a new method which allows you to test rotational-symmetrical aspheres interferometrically in a spherical or plano setup. This means without expensive auxiliary beam shaping optics. The systematic setup error is automatically removed from the measurement results, so that the displayed results correspond with the traditionally known interferometer results with adapted wave fronts. Based on this method a modification of this basic method is presented that allows you to control the manufacturing process.

Citation Download Citation

Thomas Blümel and Markus Bosse "Interferometric asphere testing in a spherical test setup", Proc. SPIE 5965, Optical Fabrication, Testing, and Metrology II, 596514 (19 October 2005); https://doi.org/10.1117/12.623529

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