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- W2012131318 abstract "Freeform optical surfaces (FOSs) will be the best elements in the design of compactoptical systems in the future. However, it is extremely difficult to measure freeform surface withsufficient accuracy, which impedes the development of the freeform surface. The design andfabrication of computer-generated hologram (CGH), which has been successfully applied to the testsfor aspheric surfaces, cannot be directly adopted to test FOSs due to their non-rotationalasymmetry. A novel ray tracing planning method combined with successively optimizing even and oddpower coefficients of phase polynomials in turn is proposed, which can successfully design anon-rotational asymmetry CGH for the tests of FOSs with an F-θ lens. A new eight-stepfabrication process is also presented aiming to solve the problem that the linewidth on the samecircle of the CGH for testing freeform surface is not uniform. This problem cannot be solved in theoriginal procedure of CGH fabrication. The test results of the step profiler show that the CGHfabricated in the new procedure meets the requirements." @default.
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- W2012131318 date "2013-01-01" @default.
- W2012131318 modified "2023-10-10" @default.
- W2012131318 title "Design and fabrication of computer-generated holograms for testing optical freeform surfaces" @default.
- W2012131318 doi "https://doi.org/10.3788/col201311.032201" @default.
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