| http://www.w3.org/ns/prov#value | - FIG. 2 is a schematic of an apparatus according to the invention in which an external transceiver emits a laser beam on a launch path through air into a coupler to a fiberoptic relay to generate an outcoupled beam which scans a probe site and is retroreflected into a fiberoptic relay retracing on the launched path into the transceiver.
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