Aktuatorindretning til et vindenergianlæg, vindenergianlæg og monteringsfremgangsmåde

An actuator device for a wind power installation, in particular for a rotor blade of a wind power installation, and also to an associated wind power installation and a method of assembly, with an actuator component and a control component, wherein the actuator component has at least one actuator layer with a preferential direction and, substantially parallel to the actuator layer, at least one exciting layer, wherein the actuator layer comprises a photoactuator, wherein the photoactuator is designed to change a strain and/or stress of the actuator layer in the preferential direction on the basis of excitation light, wherein the exciting layer is designed to guide excitation light into the actuator layer, wherein the control component comprises a light source and a light guide, wherein the light source is arranged away from the exciting layer and is connected to the exciting layer by means of the light guide. The actuator device makes it possible to ensure greater operational reliability.