Optotune's laser speckle reducers employ electroactive polymer electrodes to actuate a diffuser. Each time an electrode is charged at high voltage (300V in the case of the standard LSR-5-17 and LSR-10-22 series) the electrode expands. More details to the electroactive polymer principle can be found here. Although the voltage is high, the energy required for charging an electrode is minimal as its capacitance is only in the range of 100pF. Four electrodes are used, which must be each charged with the same voltage, but with a phase shift of 90° in between to create the circular oscillating movement. Highest speckle reduction is reached by driving the electrodes at the resonant frequency of the mechanical system (e.g. 300Hz for the LSR-5-17). 

The OEM products LSR-5-17 and LSR-10-22 are available with or without drive electronics. The standard electronics design by Optotune generates the 300V from a 5V input using a xenon flash charger IC and a high-voltage transformer. A microcontroller and four MOSFETs take care of the correct switching of the 300V among the electrodes. Schematics and part list are available upon request.