Photostricitive actuator


An actuator that uses mechanical deformation from the irradiation energy caused by the absorption of light.

Irradiating light (ultraviolet rays) onto a PLZT element generates a high photovoltaic electromotive force between the element's electrodes. The PLZT element is a piezoelectric element and generates deformation by applied voltage. The combined these effects are thought to convert light irradiation to mechanical deformation. Photostricitive actuators offer the advantage of not needing a power supply cable, and their application to switches or photoacoustic devices is under consideration. They have the disadvantage, however, of a very slow response of several minutes. One example is a prototype of an optically operated switch that turns on and off by amplifying tens of times a small optical deformation of several tens of micrometers using a displacement magnifying mechanism.


[Related Terms]
Photostrictive effect