Applying a Self-Made Automobile Heterodyne Interferometer to Measure the Parameters of Twisted Nematic Liquid Crystal

<table>The photo picture of the self-made automobile heterodyne interferometer (A: laser diode driving circuits; B: laser diode with the wavelength of 635 nm; C: EOM, electrooptical modulator; D: the tested LC; E: five-axis machine arm; F: the unfinished region; G: the finished region).</table>

Advances in Condensed Matter Physics

fig7

Figure 7

Figure 7: Applying a Self-Made Automobile Heterodyne Interferometer to Measure the Parameters of Twisted Nematic Liquid Crystal 