Deformable mirror with variable curvature and method for manufacturing such a mirror
AssigneeAlpao
InventorJulien Gérard Ernest Charton
Life of this patent
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Abstract
A deformable mirror with variable curvature including: a plate having a reflective face and opposite hidden face and whose shape has a center (C) and radiuses (r), and at least one actuator intended to exert a force on the hidden face in order to deform the plate. The plate comprises a plurality of primary and secondary portions. The secondary portions being interposed between the primary portions, each of the primary portions extending locally substantially along and on either side of a respective radius (r′) among said radiuses (r), and having a stiffness different from the adjacent secondary portions. The deformable mirror is intended to the introduction or the correction of an optical aberration in a light beam.
Claims31
A deformable mirror (1) for use in an adaptive optics system for introducing or correcting an optical aberration in a light beam, comprising a plate (2) having a reflective face (4) and an opposite hidden face (5) and whose shape has a center (C) and radiuses (r), wherein said plate (2) comprises a plurality of primary (6) and secondary (7) portions, said secondary portions (7) being interposed between said primary portions (6), each of said primary portions (6) extending locally substantially along and on either side of a respective radius (r′) among said radiuses (r) and having a stiffness different from that of said adjacent secondary portions (7),
- wherein said hidden face (5) is adapted to receive a force exerted by at least one actuator in order to deform said plate (2),
- wherein the reflective face (4) has a smooth surface comprising a joint surface, said reflective face (4) lacking unevenness and asperity, and said plate (2) having an intrinsic mechanical strength,
- whereby the hidden face (5) is adapted for undergoing pressure or tension to allow for deformation of the plate (2).
A method for manufacturing a deformable mirror (1), for use in an adaptive optics system for introducing or correcting an optical aberration in a light beam comprising the step of:
- making a plate (2) having a reflective face (4) and an opposite hidden face (5) and whose shape has a center (C) and radiuses (r), said plate (2) comprising a plurality of primary (6) and secondary (7) portions, said secondary portions (7) being interposed between said primary portions (6), each of said primary portions (6) extending locally substantially along and on either side of a respective radius (r′) among said radiuses (r) and having a stiffness different from that of said adjacent secondary portions (7), wherein the reflective face (4) has a smooth surface comprising a joint surface, said reflective face (4) lacking unevenness and asperity, said plate (2) having an intrinsic mechanical strength, and
- wherein said hidden face (5) is adapted to receive a force exerted by at least one actuator in order to deform said plate (2), the hidden face (5) being adapted for undergoing pressure or tension to allow for deformation of the plate (2).
Dependencies are inferred from the claim text.