| 摘要 |
A polymeric front optical element blank is provided which may be laminated to a rear optical element blank. The polymeric front blank comprises an optical element having an exterior convex surface and an interior concave surface, with an edge between the exterior convex surface and the interior concave surface. The optical is provided with at least two projections which extend away from and higher than the edge on a side of the optical element having the concave surface. These projections assist in aligning an back optical element during lamination so that the two lenses will not move out of optical registry during lamination, especially where centrifugal forces are used to spread an adhesive between the front and rear lenses. It is preferred that there are at least three projections extending away from and higher than the edge on a side of the optical element having the concave surface. A particularly desirable and preferred process for using these lenses comprises the steps of: a) positioning a first optical element blank according to the invention having an interior surface and an exterior surface, b) applying a photopolymerizable adhesive composition on the interior surface of the optical element blank, the photopolymerizable adhesive composition being curable by UV radiation having a wavelength of between 385 and 410 nm, and the maximum spectral sensitivity of the photopolymerizable composition being within 15 nm of said UV radiation having a wavelength of between 385 and 410 c) positioning a second optical element blank having an interior surface and an exterior surface on the polymerizable adhesive composition with an interior face in contact with the polymerizable adhesive composition to form a prelaminated association, wherein at least one of the first and second optical element blanks absorbing at least 95% of any ultraviolet radiation component between 180 and 380 nm of incident radiation and allows at least 30% transmittal of at least one wavelength of ultraviolet radiation between 385 and 410 nm, and d) irradiating the prelaminated association with UV radiation having a significant component between 385 and 410 nm through at least one of the first and second optical element blanks to cure the adhesive and to laminate the first and second optical elements. |
