Deflectometry for phase retrieval using a composite fringe

• Autorzy: Liu T. , Zhou C. , Liu Y , Si S , Lei Z.

Identyfikatory

DOI

10.5277/oa140309

• Języki publikacji: EN

Abstrakty

EN

An improved deflectometry for wavefront measurement using a composite fringe is proposed to reduce the projection fringes and improve the accuracy. The single composite fringe contains four fringes in different directions. It goes through the tested objects and then is captured by a CCD camera. Two high frequency orthogonal fringe patterns and two single period orthogonal fringe patterns can be obtained from the composite fringe by fast Fourier transform. The unwrapping of the wrapped phase of the high frequency fringe is accomplished by the corresponding single period fringe using a heterodyne method. The wavefront is reconstructed by the integration of partial derivatives. Using only one fringe, the proposed method is more applicable to dynamic wavefront measurement. The experimental results demonstrate that the proposed method can retrieve the complex wavefronts more accurately.

Słowa kluczowe

EN

wavefront measurement; fringe analysis; phase retrieval; fast Fourier transform (FFT); multifrequency heterodyne principle

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2014
• Tom: Vol. 44, nr 3
• Strony: 451--461
• Opis fizyczny: Bibliogr. 14 poz., rys., wyk.

Twórcy

autor

Liu T.

• School of Physics, Shandong University, Jinan 250100, China

autor

Zhou C.

• School of Physics, Shandong University, Jinan 250100, China

autor

Liu Y

• School of Physics, Shandong University, Jinan 250100, China

autor

Si S

• School of Physics, Shandong University, Jinan 250100, China

autor

Lei Z.

• Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China

Bibliografia

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