Patent ID: 8649103

Claim:
An adaptive lens system for laser materials processing, the adaptive lens system comprising: a first deformable lens and a second deformable lens spaced apart from each other in the direction of a common optical axis; a chamber defined between a first surface of the first deformable lens and a first surface of the second deformable lens; and a device operable to change the distance, along the optical axis, between the first surface of the first deformable lens and the first surface of the second deformable lens, thereby changing a pressure in the chamber and deforming the first deformable lens and the second deformable lens, wherein the device comprises a first piezoelectric ring actuator arranged on the first surface of the first deformable lens and a second piezoelectric ring actuator arranged on a second surface of the first deformable lens located opposite the first surface of the first deformable lens.