Pallav P, Diamond G G, Hutchins D A, Green R J, Gan T H
Univ. of Warwick, Coventry, U.K.
J Food Sci. 2009 Jan-Feb;74(1):E23-33. doi: 10.1111/j.1750-3841.2008.01011.x.
The results of imaging experiments in food materials are presented, using near-infrared wavelengths. The technique uses a modulated source and a lock-in amplifier detection circuit to give a high sensitivity to changes in through-transmission signal levels. This is shown to lead to a set of images, whereby the internal content of various foods can be imaged. Examples are presented of the detection of foreign bodies, both metallic and nonmetallic, to illustrate the imaging performance.
本文展示了使用近红外波长对食品材料进行成像实验的结果。该技术采用调制光源和锁相放大器检测电路，以实现对穿透传输信号水平变化的高灵敏度检测。结果表明，这会生成一组图像，借此可以对各种食品的内部成分进行成像。文中给出了检测金属和非金属异物的示例，以说明成像性能。
