Single shot low-coherence digital interferometer with multi-reflection reference mirror for measuring long depth object

Quang Duc Pham; Yoshio Hayasaki

doi:10.1117/12.2573284

15 June 2020 Single shot low-coherence digital interferometer with multi-reflection reference mirror for measuring long depth object

Quang Duc Pham, Yoshio Hayasaki

Author Affiliations +

Proceedings Volume 11521, Biomedical Imaging and Sensing Conference 2020; 115210Z (2020) https://doi.org/10.1117/12.2573284
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

A new type of reference mirror constructed by a half mirror and a full reflective mirror was introduced for the lowcoherence interferometer. The interference pattern recorded by the camera consisted of the interference of the object with different reflectance orders of the reference mirror, it allowed reconstructing the profile of the object whose depth was many times longer than the coherence length of the light source in a single-short. Fast Fourier transform (FFT) of the recorded hologram and the spatial filters were applied to obtain the complex amplitude for each object parts those were then combined to obtain the completed 3D information of the object.

Citation Download Citation

Quang Duc Pham and Yoshio Hayasaki "Single shot low-coherence digital interferometer with multi-reflection reference mirror for measuring long depth object", Proc. SPIE 11521, Biomedical Imaging and Sensing Conference 2020, 115210Z (15 June 2020); https://doi.org/10.1117/12.2573284

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