The Variable phase retarder can be driven with a standard labor function generators but it can also be driven by the USB ARCoptix LC Driver.The Arcoptix LC (Liquid Crystal) driver is a USB computer controlled electrical power supply optimized for driving one or two phase retarders.
The LC driver has two independent outputs (Lemo connectors). They are controlled via a simple windows compatible software. The output has a variable square amplitude with polarity inversion and a frequency of 1.6 KHz. This guarantees a homogenous variation of the LC layer inside the cell. An external trigger input can be provided on demand .