Piezoelectric elements are used as actuators incorporated into autofocus mechanisms in the lenses of digital cameras, smartphones, and other optical devices. There are two main types of mechanisms that use these actuators:
1. Mechanisms that move the lens itself, and
2. Mechanisms that adjust the focal length by changing the shape of a fluid
In both cases, large displacement volumes are required, but power consumption must also be kept to a minimum. KRYSTAL’s piezoelectric films achieve outstanding performance in both of these conflicting characteristics.
Piezoelectric materials are used in positional control devices such as camera shake correction mechanisms for digital cameras.
Mirror devices | PZT (for Actuators)
Piezoelectric MEMS are used in actuator applications for heads-up displays (HUD), contributing to miniaturization and reduced power consumption.
They are also used as mirror actuators in laser projectors.
Heads-up Displays (HUD), laser projectors
Infrared camera | PZT (for Sensors)
Pyroelectric infrared sensors use the effects of pyroelectric ceramics to detect infrared light. The spontaneous polarization of the piezoelectric material causes a temperature change when the infrared light is received, and an electric charge proportionate to the pyroelectric coefficient is generated in the optic receiver. This charge is immediately neutralized, but the sensor detects the voltage that is generated instantaneously at that moment.