Huang Yuping, Xiong Jie, Li Ziang, Hu Dong, Sun Ye, Jin Haojun, Zhang Huichun, Fang Huimin
College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China.
College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou 311300, China.
Foods. 2024 Aug 26;13(17):2688. doi: 10.3390/foods13172688.
Light penetration depth, as a characteristic parameter reflecting light attenuation and transmission in biological tissues, has been applied in nondestructive detection of fruits and vegetables. Recently, with emergence of new optical detection technologies, researchers have begun to explore methods evaluating optical properties of double-layer or even multilayer fruit and vegetable tissues due to the differences between peel and pulp in the chemical composition and physical properties, which has gradually promoted studies on light penetration depth. A series of demonstrated research on light penetration depth could ensure the accuracy of the optical information obtained from each layer of tissue, which is beneficial to enhance detection accuracy for quality assessment of fruits and vegetables. Therefore, the aim of this review is to give detailed outlines about the theory and principle of light penetration depth based on several emerging optical detection technologies and to focus primarily on its applications in the field of quality evaluation of fruits and vegetables, its future applicability in fruits and vegetables and the challenges it may face in the future.
光穿透深度作为反映光在生物组织中衰减和传输的特征参数，已应用于果蔬的无损检测。近年来，随着新型光学检测技术的出现，由于果皮和果肉在化学成分和物理性质上存在差异，研究人员开始探索评估双层甚至多层果蔬组织光学特性的方法，这逐渐推动了对光穿透深度的研究。一系列关于光穿透深度的实证研究能够确保从每层组织获得的光学信息的准确性，这有利于提高果蔬品质评估的检测精度。因此，本综述的目的是基于几种新兴光学检测技术，详细概述光穿透深度的理论和原理，并主要关注其在果蔬品质评估领域的应用、未来在果蔬中的适用性以及未来可能面临的挑战。
