Journal
OPTICAL ENGINEERING
Volume 62, Issue 9, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.62.9.094105
Keywords
digital holography; dual-wavelength; phase unwrapping; noise suppression
Categories
Ask authors/readers for more resources
Dual-wavelength or multi-wavelength digital holography expands the axial measurement range but is affected by noise enlargement. To address this, an unwrapping method based on synthetic-wavelength phase and searching process is proposed. Simulation analysis demonstrates the effectiveness of this noise suppression method. The feasibility of the proposed method is demonstrated in measuring a standard step.
Dual-wavelength or multi-wavelength digital holography extends the axial measurement range to the order of several microns or more, but the noise enlargement effect greatly affects the measurement accuracy. To address this problem, an unwrapping method is proposed based on synthetic-wavelength phase and searching process. This methodology implements noise suppression using phase unwrapping at the single-wavelength level and averaging. We introduce the analytical approach and provide a simulation analysis to demonstrate the effectiveness of this noise suppression method. The proposed method is used to measure a standard step and the results demonstrated the feasibility of the proposed method in practical usage.(c) 2023 Society of Photo-Optical Instrumentation Engineers (SPIE)
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available