Patent ID: 8885251

Claim:
The process of functionalizing an ophthalmic lens by a conforming apparatus for conforming a functionalized flexible planar film onto an ophthalmic lens, wherein the flexible planar film includes a layered structure having a circular-polarizing layer efficient for at least one wavelength of visible light, the conforming apparatus including: a module comprising a mechanical piston and a plate mounted above said mechanical piston; said piston being capable of presenting a vertical translational movement along the axis (y), within said module; a mechanical anti-return device for said piston capable of blocking the plate at a determined height on the inside of the module; a lens-holder positioned on the top face of the plate, comprising a holding device for an ophthalmic lens; a film carrier capable of holding a flat flexible film, said film carrier comprising a holding device making it possible to position and locking said film carrier on the module at its upper end, the locking involving the hermetic closure of said module; a stamp situated vertical to the module; and electrical, pneumatic or mechanical translation devices connecting said stamp to a support shaft, said devices being capable of effecting controlled vertical and/or horizontal movements of the stamp; wherein actuation of the stamp, the piston, the translation devices, according to a predetermined sequence and governed by an automatic device makes it possible to establish the contact between the stamp, the flexible planar film and the ophthalmic lens until obtaining a conformal contact between said ophthalmic lens and said film, and wherein said process comprises the following steps: a) contact with the stamp and the planar film under the action of the translation devices and preforming of said film by the application of a mechanical force up to a threshold P1 or a position threshold Z1 controlled by a force sensor and/or position sensor, wherein the force threshold P1 is between 1N and 200N; b) activation of the piston in the module involving an ascending vertical translational movement at a speed of VO of the ophthalmic lens up to initiation of the contact between the preformed film and said lens; c) maintenance of the ascending vertical translation of the ophthalmic lens by the action of the piston until attaining the target force threshold P2 or the position threshold Z2 controlled by the force sensor and/or the position sensor involving the propagation and establishment of the conformal contact between the face of the lens to be treated and the film; d) maintenance of the lens/film conformal contact during a temporization time t 2 ; e) ascending vertical translation of the stamp at a speed V2; f) interruption of the pressure applied to the piston; and g) opening of the module.