PLASTIC LENS AND METHOD FOR MAKING THE SAME Russian patent published in 2006 - IPC B29D11/00 G02C7/04 G02C7/10 G02B1/04 

FIELD: optical engineering.

SUBSTANCE: plastic lens intended to absorb ultraviolet light with wavelength around 400 nm may be made from composition comprising (A) lens material monomer containing diethylene glycol bis(allyl) carbonate, (B) organic peroxide-based polymerization initiator, (C) cobalt compound selected from at least taw following: CoO-Al₂O₃ and CoO-Al₂O₄, and (D) at least one ultraviolet light-absorbing compound selected from 2-hydroxy-4-octyloxybenzophenone, 2,2',4,4'-terahydroxy-4-octyloxybenzophenone, and 2,2',4'-trihydroxy-4-octyloxybenzophenone. Invention also concerns lens manufacture method comprising: mixing compartment A, compartment B, fluid with cobalt containing compartment C with dispersant, and compartment D; pouring resulting mixed fluid into mold; and polymerization of the fluid in mold to form plastic lens.

EFFECT: improved quality of lens.

17 cl, 2 tbl, 9 ex