Measuring device with an optical interface with low polarization dependent loss (PDL)

摘要

Disclosed is a boundary surface 50 between optical media with different refractive indices. The interface 50 is arranged angular with respect to an incident optical signal 75 for reducing a return reflection into the direction of the incident optical signal 75. The transmission of the incident optical signal 75 through the interface 50 is substantially independent of the state of polarization of the incident optical signal 75. This can be achieved in that the transmissions of the optical signal perpendicular and parallel to the plane of incidence of the angular boundary surface are substantially equal.