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近红外光谱学技术是无损检测与诊断的重要方法。采用频率分辨光谱学技术，检测以相位表示的光源与探测器之间的传输延迟，与光强检测相比具有更高的灵敏度。当在均匀介质中存在两个幅值相等、初始相位相差１８０°的近红外光源阵列时，依据光学相干原理，两光源的中垂线即为幅值为零、相位突变的零线。但当均匀介质中存在光学性质不同的异物时，零线会发生偏折。这种差异性即可提供有关异物大小、位置等信息。乳腺癌被认为是存在于乳房这一均匀组织中的异物。因此，基于上述原理，我们已研制出可用于无损检测乳腺癌的新型医疗仪器。与目前用的Ｘ射线、ＣＴ等比较，本仪器具有体积小、价格便宜、易于推广等优点。
Near-infrared spectroscopy is an important method of non-destructive testing and diagnosis. The use of frequency-resolved spectroscopy detects the propagation delay between the light source and the detector, expressed in terms of phase, with higher sensitivity than light intensity detection. When there are two NIR arrays with the same amplitude and different initial phase 180 ° in the homogeneous medium, the perpendicular line of the two light sources is the zero line with abrupt phase and zero amplitude according to the principle of optical coherence. However, when there is a homogeneous medium with different optical properties of foreign matter, the zero line deflection occurs. This difference can provide information on foreign body size, location and other information. Breast cancer is thought to be a foreign body present in the uniform tissue of the breast. Therefore, based on the above principle, we have developed a new type of medical instrument that can be used for non-destructive testing of breast cancer. Compared with the current X-ray, CT, etc., the instrument has the advantages of small size, low price, easy to promote.