Patent ID: 7727352
Filing Date: 2010-06-01
Classification: B29C,B29L,G02B,Y10T

Abstract:
1. Method of producing a polarizing optical element by applying a multilayer structure to one surface of a base optical element, the structure comprising an orienting first layer and a polarizing second layer comprising liquid-crystal polymers and at least one dichroic dye, said dichroic dye having an angular orientation determined by the first layer, the method comprising the following steps: a) producing the multilayer structure on a support; b) placing the base optical element and the multilayer structure carried by the support between a first pressing device having a bearing surface and a second pressing device having an inflatable membrane, the multilayer structure facing the base optical element and a portion of an adhesive being placed between said structure and said base element; c) pressing the multilayer structure against the surface of the base optical element by inflating the membrane of the second device and maintaining a fixed gap between the first and second pressing devices; and d) releasing the optical element and removing the support so as to leave the multilayer structure bonded to the surface of said base optical element, in which the first pressing device having the bearing surface includes another inflatable membrane, that forms said bearing surface, and in which step c) is carried out by inflating the membranes of the first and second pressing devices, and wherein said polarizing second layer is undercured during steps b) and c).