The macro structure of many soft heterogeneous products can be studied by a moving optical fibre technique . The method i s based upon an optical sensor that penetrates into the heterogeneous medium. The optical sensor discriminates between materials differing in refractive index or in scattering properties. Coupling of the signal of the optical sensor to its position reveals the spatial distribution of the materials in the product. Applications shown include bread, soft ice-cream, chocolate mousse and draining curd. The major advantages of the method are its speed and ease; moreover, the sample is hardly disturbed by the sensor. The limit of resolution is about 20 um.
Akkerman, J. C.; Bisperink, C. G. J.; and Ronteltap, A. D.
"A Moving Optical Fibre Technique for Structure Analysis of Heterogeneous Products: Application to Different Foodstuffs,"
Food Structure: Vol. 11
, Article 3.
Available at: http://digitalcommons.usu.edu/foodmicrostructure/vol11/iss2/3