A laminated optical element is produced by prepositioning a polarizing sheet, which has been coated on both sides with adhesive compatible with the encasing material, in a mold so as to accurately space the polarizing sheet from the inner mold surfaces, injecting a monomer of allyl diglycol carbonate...http://www.google.co.uk/patents/US3970362?utm_source=gb-gplus-sharePatent US3970362 - Process of producing polarizing optical devices and product thereof
