【摘要】：提出一種隨深度變化的色散補(bǔ)償方法,用以提升頻域光學(xué)相干層析成像系統(tǒng)的縱向分辨率。該方法利用迭代算法計(jì)算出不同成像深度處的色散補(bǔ)償系數(shù),通過(guò)數(shù)值計(jì)算,得到色散補(bǔ)償系數(shù)與成像深度的關(guān)系表達(dá)式,計(jì)算出各成像深度處的色散補(bǔ)償系數(shù),利用這些色散補(bǔ)償系數(shù)消除相應(yīng)深度位置處信號(hào)的高階色散相位,從而有針對(duì)性地對(duì)系統(tǒng)中參考臂與樣品臂的色散失配進(jìn)行補(bǔ)償,消除色散的展寬效應(yīng)。理論推導(dǎo)和實(shí)驗(yàn)結(jié)果表明,光學(xué)相干層析成像系統(tǒng)中,隨深度變化的色散補(bǔ)償方法對(duì)各成像深度位置處的信號(hào),包括成像深度較深位置處的弱信號(hào),均可以進(jìn)行有效的色散補(bǔ)償,進(jìn)而得到更多的樣品結(jié)構(gòu)信息。
[Abstract]:A dispersion compensation method with depth variation is proposed to improve the longitudinal resolution of optical coherence tomography system in frequency domain. In this method, the dispersion compensation coefficients at different imaging depths are calculated by iterative algorithm. By numerical calculation, the relationship between dispersion compensation coefficients and imaging depth is obtained, and the dispersion compensation coefficients at each imaging depth are calculated. These dispersion compensation coefficients are used to eliminate the higher-order dispersion phase of the signal at the corresponding depth position, so that the dispersion mismatch between the reference arm and the sample arm in the system can be compensated, and the dispersion broadening effect can be eliminated. The theoretical derivation and experimental results show that the dispersion compensation method with depth variation in optical coherence tomography system can compensate the signals at different imaging depths, including the weak signals at the deeper positions of the imaging depth. The dispersion compensation can be carried out effectively, and more information of sample structure can be obtained.
【作者單位】： 中國(guó)科學(xué)院上海光學(xué)精密機(jī)械研究所信息光學(xué)與光電技術(shù)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);江南大學(xué)理學(xué)院;
【基金】：上海市科學(xué)技術(shù)委員會(huì)創(chuàng)新行動(dòng)計(jì)劃(15441905600) 廣西高校光電信息處理重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金資助項(xiàng)目(KFJJ2016-04)
【分類號(hào)】：TP391.41
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本文編號(hào)：2220160