1 July 2007 Autocalibration of spectral-domain optical coherence tomography spectrometers for in vivo quantitative retinal nerve fiber layer birefringence determination
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J. of Biomedical Optics, 12(4), 041205 (2007). doi:10.1117/1.2764460
Abstract
Accurate wavelength assignment of each spectral element for spectral-domain optical coherence tomography (SD-OCT) and optical frequency domain imaging (OFDI) is required for proper construction of biological tissue cross-sectional images. This becomes more critical for functional extensions of these techniques, especially in polarization-sensitive optical coherence tomography (PS-OCT), where incorrect wavelength assignment between the two orthogonal polarization channels leads to polarization artifacts. We present an autocalibration method for wavelength assignment that does not require separate calibration measurements and that can be applied directly on actual data. Removal of the birefringence artifact is demonstrated in a PS-OCT system with picometer accuracy in the relative wavelength assignment, resulting in a residual phase error of 0.25 deg/100 μm. We also demonstrate, for the first time, a quantitative birefringence map of an in vivo human retinal nerve fiber layer.
Mircea Mujat, Boris Hyle Park, Barry Cense, Teresa C. Chen, Johannes F. de Boer, "Autocalibration of spectral-domain optical coherence tomography spectrometers for in vivo quantitative retinal nerve fiber layer birefringence determination," Journal of Biomedical Optics 12(4), 041205 (1 July 2007). http://dx.doi.org/10.1117/1.2764460
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KEYWORDS
Polarization

Birefringence

Optical coherence tomography

Spectrometers

Calibration

Modulation

In vivo imaging

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