| CPC G02B 26/004 (2013.01) [G02B 3/14 (2013.01); G02B 7/04 (2013.01); A61B 3/04 (2013.01)] | 10 Claims |
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1. An adaptative optical device comprising at least one deformable lens provided with an optical axis, said at least one deformable lens comprising:
a first membrane, transparent and deformable, which has a polygonal sheet-like shape, intercepts said optical axis, is extended, at least along a first direction substantially orthogonal to said optical axis, between a first end having a first end face and an opposite second end having a second end face, and is provided with a first external face and with a first internal face opposite said first external face; wherein the first end and the second end of said first membrane extend along a first transverse direction orthogonal to said first direction and to the optical axis; wherein the first end face of the first end and the second end face of the second end of said first membrane are movable at least parallel to said optical axis; wherein said first membrane comprises a traversing area intended to be traversed by at least one light beam and provided in a central zone with respect to said first end and second end;
a first optical layer, of deformable material and at least partially transparent, placed on the first internal face of said first membrane; wherein said first optical layer is made of an elastically deformable solid material;
a first support base that is rigid and at least partially transparent, which intercepts said optical axis with a first side and an opposite second side; wherein on said first side said first optical layer is placed that is interposed between said first support base and said first membrane;
at least one spacer element which is made of substantially rigid material and is interposed between said first support base and the first internal face of said first membrane;
a first actuator system mechanically connected to said first membrane and arranged for varying the curvature of said first membrane with respect to said optical axis;
wherein said first actuator system comprises:
a first movement member, movable along a first movement direction having at least one component parallel to said optical axis, mechanically connected to the first end of said first membrane, and configured for thrusting or pulling the first end face of the first end of said first membrane;
a second movement member, movable along a second movement direction having at least one component parallel to said optical axis, mechanically connected to the second end of said first membrane, and configured for thrusting or pulling the second end face of the second end of said first membrane;
a first drive member operatively connected to said first movement member and to said second movement member, and arranged for moving said first movement member and said second movement member respectively along said first and second movement direction, by respectively moving the first end and the second end of said first membrane at least parallel to said optical axis, in order to place said first membrane at least in a curved configuration;
wherein said deformable lens comprises at least one first stiffening strip and at least one second stiffening strip placed, respectively, along the first end and the second end of said first membrane;
wherein said first movement member and said second movement member engage said first membrane by respectively acting on said at least one first stiffening strip and on said at least one second stiffening strip;
wherein said first membrane in said at least one curved position has a transverse section substantially constant along said first transverse direction;
wherein said at least one spacer element is placed in proximity to the traversing area of said first membrane, in a position substantially equidistant between said first end and said second end;
wherein said at least one spacer element comprises two spacer elements, which are placed on opposite flanks of said first membrane; wherein said opposite flanks are arranged orthogonally to said first transverse direction; and wherein said two spacer elements are spaced from each other along said first transverse direction, so that said two spacer elements let at least a portion of said traversing area free.
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