19 October 2016 Variable aberration generator using a high-order even aspheric singlet for testing optical surfaces
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Proceedings Volume 10155, Optical Measurement Technology and Instrumentation; 101550A (2016) https://doi.org/10.1117/12.2243814
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
Traditional null optics is generally designed for a particular optical surface. It must be redesigned when the test surface is changed no matter the null optic is reflective, transmitted or a CGH. Development of advanced optical machining and testing based on deterministic figuring and null test makes it possible to apply high-order aspheres. This paper presents a plano-concave singlet to realize variable aberration correction for testing different surfaces. The concave surface is an even asphere with high-order terms. By changing the axial distances among the transmission sphere, the null singlet and the test surface, variable aberrations are generated to meet the aberration balance requirement for various surfaces. The residual aberrations are confirmed within the vertical dynamic range of measurement of the interferometer. It enables flexible testing of optical surfaces without dedicated null optics. The optical design verifies that the aspheric singlet can be used to test conic surfaces with different conic constant and radius of curvature ranging from ellipsoid, paraboloid to hyperboloid and an even asphere.
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Jinfeng Lu, Jinfeng Lu, Shanyong Chen, Shanyong Chen, Shuai Xue, Shuai Xue, } "Variable aberration generator using a high-order even aspheric singlet for testing optical surfaces", Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101550A (19 October 2016); doi: 10.1117/12.2243814; https://doi.org/10.1117/12.2243814
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