Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Reshaping or treatment of an optical preform
Reexamination Certificate
2011-06-21
2011-06-21
Huson, Monica A (Department: 1742)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Reshaping or treatment of an optical preform
C264S162000
Reexamination Certificate
active
07964122
ABSTRACT:
A method of shaping an aspherical optical element, such as a composite mirror element, the method comprising the following steps:fastening, preferably by adhesive, an optical element blank, presenting an optical surface that is to be shaped, to the inside of a ring, the optical surface of the blank projecting beyond an edge of said ring;applying forces and moments to the perimeter of the ring in such a manner as to deform it in controlled manner, thereby also deforming the optical surface of the blank fastened to its inside;shaping said deformed optical surface by abrasion so as to restore it to a shape that is spherical or planar; andextracting the blank from the ring so as to release the stresses deforming said shaped optical surface, thereby enabling it to acquire the desired aspherical shape.
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Carre Jean-François
de Mollerat du Jeu Christian
Ferrari Marc
Hugot Emmanuel
Lemaitre Gerard
Alston & Bird LLP
Centre National de la Recherche Scientifique
Huson Monica A
Societe Europeenne de Systemes Optiques
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