Optimal Information About the Invisible

Laser beams can be used to precisely measure an object’s position or velocity. Normally, however, a clear, unobstructed view of this object is required — and this prerequisite is not always satisfied. In biomedicine, for example, structures are examined that are embedded in an irregular, complicated environment. There, the laser beam is deflected, scattered, and refracted, often making it impossible to obtain useful data from the measurement.