Abstract
An integrating-bucket method is widely used as a reconstruction tool for full-field optical coherence tomography (FF-OCT). However, it requires high-precision adjustments of the phase modulation parameters. If the parameters are not optimal, the reconstructed tomogram will incur severe artifacts. We propose a post-processing method for removing or reducing such artifacts by utilizing a correction factor extracted from a pre-reconstructed tomogram. FF-OCT imaging created using a coin verifies the effectiveness of the method not only for a single en face image but also for an entire 3-D image. It is expected that the proposed method will expand the application of FF-OCT from biomedical imaging to semiconductor wafers or display panel inspections.
Highlights
Full-field optical coherence tomography (FF-OCT) is composed of a Michelson interferometer with a full-field illumination
An en face image was reconstructed from a two-dimensional interferogram using a Hilbert transform [8]
With phase-shifting interferometry (PSI), an en face tomographic image was reconstructed using several phase-modulated interferograms taken at a particular depth [10,11]
Summary
Full-field optical coherence tomography (FF-OCT) is composed of a Michelson interferometer with a full-field illumination. An en face image was reconstructed from a two-dimensional interferogram using a Hilbert transform [8]. With this scheme, the reconstruction is generally insufficient, owing to the finite spatial size of the interferogram [9]. With phase-shifting interferometry (PSI), an en face tomographic image was reconstructed using several phase-modulated interferograms taken at a particular depth [10,11]. To obtain a fast interferogram acquisition speed with the PSI, the integrating-bucket method was applied [12,13]. The integrating-bucket method is theoretically fast and accurate, adjusting the parameters for the phase modulation is not
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