N. Ohyama, I. Ichimura, I. Yamaguchi, T. Honda, J. Tsujiuchi
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A Dynamic Zone Plate Interferometer for Measuring Aspherical Surfaces
This paper proposes a dynamic zone plate interferometer (DZPI), which has a possibility of measuring aspherical surfaces without the need of either a standard surface or of a computer generated holograms (CGH). The accuracy of surface error measurments can be improved by using a fringe analysis method up to about λ/100. An experimantal result is also presented.