The Methods and Experiments of Shape Measurement for Off-Axis Conic Aspheric Surface

  title={The Methods and Experiments of Shape Measurement for Off-Axis Conic Aspheric Surface},
  author={Shijie Li and Jin Zhang and Weiguo Liu and Hai-feng Liang and Y. F. Xie and Xiaoqin Li},
The off-axis conic aspheric surface is widely used as a component in modern optical systems. It is critical for this kind of surface to obtain the real accuracy of the shape during optical processing. As is widely known, the null test is an effective method to measure the shape accuracy with high precision. Therefore, three shape measurement methods of null test including auto-collimation, single computer-generated hologram (CGH), and hybrid compensation are presented in detail in this research… Expand

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