Low-coherence digital holography for long-range object profilometer using double multi-reflection reference mirrors

Quang Duc Pham; Yoshio Hayasaki

doi:10.1117/12.2593774

20 June 2021 Low-coherence digital holography for long-range object profilometer using double multi-reflection reference mirrors

Quang Duc Pham, Yoshio Hayasaki

Author Affiliations +

Proceedings Volume 11782, Optical Measurement Systems for Industrial Inspection XII; 117820H (2021) https://doi.org/10.1117/12.2593774
Event: SPIE Optical Metrology, 2021, Online Only

Abstract

A new optical configuration of digital holography that employed two multi-reflection reference mirrors is proposed. The number of reflectance orders from the reference mirrors was doubled from the previous research of the digital holography it allows recording more interference fringes without the expansion of the camera’s sensor size. The proposed double multi-reflection reference mirrors can improve the measurement range to twice better than single multireflection reference mirrors e without any degradation of without any degradation of the spatial resolution. The new system can also help to avoid the low fringe contrast of the interference pattern of the high reflection order.

Conference Presentation

Citation Download Citation

Quang Duc Pham and Yoshio Hayasaki "Low-coherence digital holography for long-range object profilometer using double multi-reflection reference mirrors", Proc. SPIE 11782, Optical Measurement Systems for Industrial Inspection XII, 117820H (20 June 2021); https://doi.org/10.1117/12.2593774

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