Devices, arrangements and apparatus adapted to propagate at least one electro-magnetic radiation are provided. In particular, a probe housing, a sample arm section and a reference arm section can be included. For example, the sample arm section can be at least partially situated within the probe housing,...http://www.google.co.uk/patents/US20060109478?utm_source=gb-gplus-sharePatent US20060109478 - Devices and arrangements for performing coherence range imaging using a common path interferometer