Optical lens preforms

B - Operations – Transporting – 29 – D

Patent

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B29D 11/00 (2006.01) B29B 11/14 (2006.01) G02B 3/00 (2006.01) G02C 7/02 (2006.01)

Patent

CA 2248832

An optical preform (10) composed of an optical article, such as a single vision lens, is provided with an adjacent layer of a partially hardened resin (20). The adjacent layer (20) can be conformed to a mold (30) and further hardened to modify the optical properties of the preform (10). In addition, the partially hardened resin layer (20) can be initially placed on the optical article (10) prior to positioning the optical article against the mold (30). Alternatively, the partially hardened resin layer (20) can be initially placed on the surface of the mold (30) prior to positioning the optical article (10) against the mold (30).

Cette préforme optique (10), constituée d'un article optique tel qu'une lentille de vision simple, est pourvue d'une couche adjacente d'une résine partiellement durcie (20), laquelle peut se conformer à un moule (30) et être ensuite durcie afin de modifier les propriétés optiques de la préforme (10). En outre, on peut d'abord placer cette couche de résine partiellement durcie (20) sur l'article optique (10) avant de placer ce dernier contre le moule (30). Dans un autre mode de réalisation, on peut d'abord placer la couche de résine partiellement durcie (20) sur la surface du moule (30) avant de placer l'article optique (10) contre celui-ci (30).

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