【摘要】：利用Monte Carlo方法模擬光在洋蔥組織內(nèi)部的傳輸特性,并結(jié)合采用光纖探頭的接觸式測量條件,對漫反射檢測信號進行仿真計算,分析表皮厚度和光學性質(zhì)對測量的影響。結(jié)果表明,表皮對信號強度有明顯的衰減作用,但對平均穿透深度影響不大。在波長800nm處,探測點到入射點的距離(源探距)為0.9~2.0cm時,在保證信號強度的同時可達到0.5~0.8cm的平均穿透深度,并可檢測到此深度的頸腐病害(Botrytis allii Munn.);使用直徑和數(shù)值孔徑較大的光纖探頭可以在保證測量精度的同時提高探測靈敏度。
[Abstract]:The transmission characteristics of light in onion tissue were simulated by Monte Carlo method, and the influence of the thickness of epidermis and optical properties on the measurement was analyzed by using the contact measurement conditions of optical fiber probe. The results show that the epidermis can attenuate the signal intensity obviously, but has little effect on the average penetration depth. At wavelength 800nm, when the distance from the detection point to the incident point (source probe distance) is 0.9~2.0cm, the average penetration depth of 0.5~0.8cm can be achieved at the same time as the signal intensity is guaranteed, and the neck rot disease (Botrytis allii Munn.); can be detected at this depth. The optical fiber probe with large diameter and numerical aperture can improve the detection sensitivity while ensuring the measurement accuracy.
【作者單位】： 華中農(nóng)業(yè)大學理學院;
【基金】：國家自然科學基金項目(61505063) 中央高�；究蒲袠I(yè)務費專項(2662015BQ046)
【分類號】：S663.2;TN215

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