| 摘要 |
The present invention refers to a deformable lens structure for adaptive optics devices.;The lens structure comprises:
a first layer (2) elastically deformable in response to an applied force, said first layer having a first outer surface (21), adapted to receive an incident light beam (L), and a first inner surface (22), opposite said first outer surface, at least a first central portion (20) of said first layer being transparent to said light beam (L);a second layer (3) positioned spaced with respect to said first layer, said second layer having a second inner surface (31), facing the first inner surface (22) of said first layer, and a second outer surface (32), opposite said second inner surface, at least a second central portion (30) of said second layer being transparent to said light beam (L);a shaped spacer element (4), positioned between the first inner surface (22) of said first layer and the second inner surface (31) of said second layer and integrally connected to said first and second layer, and an inner chamber (5) having walls defined by said spacer element (4) and by said first and second layer (2-3), a liquid (6) transparent to said light beam (L) being present in said inner chamber in contact with said first and second layer.one or more first electrostatic actuators (811, 812, 813, 831, 832) transparent to said light beam (L), said first electrostatic actuators being operatively associated with said first layer and positioned at the first central portion (20) of said first layer;one or more second electrostatic actuators (821, 822, 823, 841, 842) transparent to said light beam (L), said second electrostatic actuators being operatively associated with said second layer and positioned at the second central portion (30) of said second layer. |
| 主权项 |
1. A lens structure for adaptive optics devices, which comprises:
an optical axis (100) along which, in the use of said lens structure, a light beam (L) is transmitted; a first layer elastically deformable in response to an applied force, said first layer having a first outer surface and a first inner surface, opposite said first outer surface, said first layer comprising a first central portion transparent to said light beam (L); a second layer positioned spaced with respect to said first layer, said second layer having a second inner surface, facing said first inner surface, and a second outer surface, opposite said second inner surface, said second layer comprising a second central portion transparent to said light beam (L), said first and second central portions defining an optical aperture of said lens structure; a spacer element positioned between said first inner surface and said second inner surface and integrally connected to said first and second layer, said spacer element being arranged so that the separation distance between said first and second inner surface is in the range between 25 μm and 100 μm; an inner chamber at least partially defined by said first and second layer and by said spacer element, said inner chamber containing an electrically insulating apolar liquid, transparent to said light beam (L) and in contact with said first and second layer, said inner chamber being closed with respect to the outside environment so as to maintain the volume of said transparent liquid constant, when said first layer is deformed; one or more first electrostatic actuators transparent to said light beam (L), said first electrostatic actuators being operatively associated with said first layer and positioned at said first central portion; one or more second electrostatic actuators transparent to said light beam (L), said second electrostatic actuators being operatively associated with said second layer and positioned at said second central portion;wherein said first and second electrostatic actuators are adapted to supply first and second control voltages (VA1, VA2, VA3, VA4, VB1, VB2, VB3, VB4) to generate an electrostatic force field (E), between said first and second layer, capable of causing a deformation of said first central portion;wherein, in the use of said lens structure, said first central portion is deformed according to profiles such as to compensate optical aberrations of an order greater than or equal to 2, excluding defocus, of the wavefront of said light beam. |
