An optical probe, which is particularly suited to reduce noise in measurements taken on an easily compressible material, such as a finger, a toe, a forehead, an earlobe, or a lip, measures characteristics of the material. A neonatal and adult disposable embodiment of the probe include adhesive coated...http://www.google.de/patents/US5782757?utm_source=gb-gplus-sharePatent US5782757 - Low-noise optical probes
