Wavelet transform-based method of compensating dispersion for high resolution imaging in SDOCT

Haiyi Bian; Wanrong Gao

doi:10.1117/12.2065309

16 September 2014 Wavelet transform-based method of compensating dispersion for high resolution imaging in SDOCT

Haiyi Bian, Wanrong Gao

Proceedings Volume 9236, Scanning Microscopies 2014; 92360X (2014) https://doi.org/10.1117/12.2065309
Event: SPIE Scanning Microscopies, 2014, Monterey, California, United States

Abstract

The axial resolution is an important parameter in Optical Coherence Tomography (OCT). In OCT a broadband light source is used to achieve high axial resolution imaging. However the dispersion results in a broadening of the coherence envelope. The dispersion mismatch between reference and sample arms then needs to be minimized to achieve optimal axial resolution for OCT. In this work we propose a new numerical dispersion compensation method to obtain ultrahigh resolution in SDOCT, in which wavelet transform instead of Fourier transform is used to obtain the signal in different frequency domain. And a series of the phase signals of different interfaces of the sample can be obtained. Under the homogeneous medium approxiamtion, the phase signal is a linear function of the wave number. Thus based on linearization of the phase signal of different interface and the wave number, the axial resolution can be improved.

Citation Download Citation

Haiyi Bian and Wanrong Gao "Wavelet transform-based method of compensating dispersion for high resolution imaging in SDOCT", Proc. SPIE 9236, Scanning Microscopies 2014, 92360X (16 September 2014); https://doi.org/10.1117/12.2065309

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