EM Wave & Polarization 林志民 Jim Jr-Min Lin http://en.wikipedia.org/wiki/File:Onde_electromagn%C3%A9tique.png

Vector q

Electric Field is a Vector. q

Polarizer 偏振片 Conductive direction Only a certain direction of the E vector can transmit the polarizer, not the perpendicular one. Conductive direction

The transmittance of an ideal polarizer is: If the transmitted direction is x, EX component can go through, not EY. The transmittance of an ideal polarizer is: q

Wave

q

Number of Wavelength (# of wave)

Birefringence 双折射

7 6 7 4 6 7.5 5 2 4 3 1 2 1 http://en.wikipedia.org/wiki/File:Waveplate.png

Half-wave plate

Before entering the medium q Before entering the medium After the medium q