Does Quarter Wave Plate Change Intensity?

NOTE: No Intensity is lost passing through the QWP ! THE SAME! Intensity does not change!

What is the function of quarter wave plate?

Quarter-Waveplates. Quarter-waveplates are used to turn linearly polarized light into circularly polarized light and vice versa. To do this, the waveplate must be oriented so that equal amounts of fast and slow waves are excited.

What does a quarter wave plate do to unpolarized light?

A quarter-wave plate converts circularly polarized light into linearly polarized light.