Geometrical error calibration in reflective surface testing based on reverse Hartmann test

Zhidong Gong, Daodang Wang, Ping Xu, Chao Wang, Rongguang Liang, Ming Kong, Jun Zhao, Linhai Mo, Shuhui Mo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


In the fringe-illumination deflectometry based on reverse-Hartmann-test configuration, ray tracing of the modeled testing system is performed to reconstruct the test surface error. Careful calibration of system geometry is required to achieve high testing accuracy. To realize the high-precision surface testing with reverse Hartmann test, a computer-aided geometrical error calibration method is proposed. The aberrations corresponding to various geometrical errors are studied. With the aberration weights for various geometrical errors, the computer-aided optimization of system geometry with iterative ray tracing is carried out to calibration the geometrical error, and the accuracy in the order of subnanometer is achieved.

Original languageEnglish (US)
Title of host publicationApplied Optical Metrology II
EditorsJames D. Trolinger, Erik Novak
ISBN (Electronic)9781510612037
StatePublished - 2017
EventApplied Optical Metrology II 2017 - San Diego, United States
Duration: Aug 8 2017Aug 9 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherApplied Optical Metrology II 2017
Country/TerritoryUnited States
CitySan Diego


  • computer-aided optimization
  • deflectometrygeometrical error calibration
  • surface testing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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