OPTICAL DELAY LINE, LOW-COHERENCE INTERFEROMETER IMPLEMENTING THIS LINE, MEASURING METHOD AND DEVICE IMPLEMENTING THIS INTERFEROMETER

摘要

An optical delay line (LR) intended to be implemented in an interferometer, comprising a rotating polygon (29). This polygon (29) is arranged to modulate the respective optical paths of first and second light beams (Li1, Li2), which are issued from the same what is called measurement beam, and which are directed through the polygon (29) toward a first and a second reflector (21, 22), respectively, so as to generate an optical delay by way of the difference between the optical paths of these first and second beams (Li1, Li2). Implementation in an optical measuring device integrating a low-coherence interferometer.