Process for moulding a lens having an insert
AssigneeEssilor International
InventorsOdile Primel, Maxime Pillie, Tony Dantas De Morais, Leanirith Yean
Life of this patent
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Abstract
A lens has at least one insert (16, 28), which defines an optical path. For manufacturing the lens, the insert is first bonded to an overmould (36). A polymer (44) is then moulded in a mould (42, 36) formed on one of its faces from the overmould. After moulding, the overmould may be preserved and form part of the lens, if necessary after surface grinding. The overmould may also be separated from the lens; in this case, the lens is machined, removing at least part of the inserts. The lens obtained has an insert in a reproducible position, with an entrance or exit surface inducing no optical distortion.
Claims11
A process for moulding a lens having at least one insert defining an optical path within the lens for an image different from that of an environment viewed through the lens, comprising:
- bonding of the insert to an overmould;
- moulding of a polymer in a mould formed on one of its faces from the overmould thereby forming the lens having the at least one insert defining the optical path within the lens for an image different from that of the environment viewed through the lens.
Dependencies are inferred from the claim text.