Shape memory alloy (SMA) actuators for focus compensation in XR displays and cameras (Conference Presentation)

Many optical systems such as cameras and XR displays suffer a loss of performance when ambient temperature changes due to distortion of optics. A focusing actuator can compensate for distortion and therefore maintain system performance. Existing actuators require always-on power consumption, which is undesirable. Here we will present a novel SMA actuator which utilizes the unique characteristics of SMA to provide temperature compensation without compromising power consumption.