The present invention provides an artificial member (80, 210) which mimics the absorbance spectrum of a body part and includes the spectral components of blood analytes. The artificial member comprises a light scattering and reflecting material, and has a chamber portion comprising one or more chambers...http://www.google.com.au/patents/US6657717?utm_source=gb-gplus-sharePatent US6657717 - Device for verifying the accuracy of a spectral analyzer
