Shape measurement of microscopic object by using digital lateral shearing holography

Xiufa Song; Baoqun Zhao

doi:10.1117/12.838009

24 November 2009 Shape measurement of microscopic object by using digital lateral shearing holography

Xiufa Song, Baoqun Zhao

Proceedings Volume 7513, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology; 751322 (2009) https://doi.org/10.1117/12.838009
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

A phase reconstruction method which is combined digital holography with digital lateral shearing interferometry has been analyzed and verified by computer simulation. The results show that one-dimensional phase unwrapping procedure must be applied to the original reconstructed phase field before lateral shearing. An effective method to eliminate the linear term of the shearogram automatically have been proposed and demonstrated. Moreover, the simulation results also show that the maximum of the difference between two adjacent pixels of the shearogram must be less than 2π in order to reconstruct phase map correctly. If the value is more than 2π, an adoptable method is padding zeros to the recorded hologram appropriately.

Citation Download Citation

Xiufa Song and Baoqun Zhao "Shape measurement of microscopic object by using digital lateral shearing holography", Proc. SPIE 7513, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology, 751322 (24 November 2009); https://doi.org/10.1117/12.838009

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