Transmitted wavefront testing with large dynamic range based on computer-aided deflectometry

Daodang Wang, Ping Xu, Zhidong Gong, Zhongmin Xie, Rongguang Liang, Xinke Xu, Ming Kong, Jun Zhao

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


The transmitted wavefront testing technique is demanded for the performance evaluation of transmission optics and transparent glass, in which the achievable dynamic range is a key issue. A computer-aided deflectometric testing method with fringe projection is proposed for the accurate testing of transmitted wavefronts with a large dynamic range. Ray tracing of the modeled testing system is carried out to achieve the virtual 'null' testing of transmitted wavefront aberrations. The ray aberration is obtained from the ray tracing result and measured slope, with which the test wavefront aberration can be reconstructed. To eliminate testing system modeling errors, a system geometry calibration based on computer-aided reverse optimization is applied to realize accurate testing. Both numerical simulation and experiments have been carried out to demonstrate the feasibility and high accuracy of the proposed testing method. The proposed testing method can achieve a large dynamic range compared with the interferometric method, providing a simple, low-cost and accurate way for the testing of transmitted wavefronts from various kinds of optics and a large amount of industrial transmission elements.

Original languageEnglish (US)
Article number065705
JournalJournal of Optics (United Kingdom)
Issue number6
StatePublished - Jun 2018


  • computer-aided method
  • deflectometry
  • geometry calibration
  • large dynamic range
  • transmitted wavefront testing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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