Pre-edging lens and method for manufacturing edged lens
View Patent ↗An object of the present invention is to provide a pre-edging lens and a method for manufacturing an edged lens, wherein provisions are made to be able to maintain the cell gap of a liquid crystal lens structure constant while, in effect, eliminating the need to incorporate any spacers in the edged lens. More specifically, the invention provides a pre-edging lens and a method for manufacturing an edged lens, wherein the pre-edging lens includes a first transparent substrate, a second transparent substrate, a first sealing material which does not contain any spacer, a liquid crystal layer provided between the first transparent substrate and the second transparent substrate and sealed by the first seal, and a second seal which contains a spacer and which is disposed in a region provided between the first transparent substrate and the second transparent substrate and located outwardly of the first seal, the region being removed during edging.
1. An edged lens manufacturing method comprising the steps of:
disposing, between a first transparent substrate and a second transparent substrate, a first sealing material which does not contain any spacer member and a second sealing material which contains a spacer member, said second sealing material being located outwardly of said first sealing material, and thereby forming a blank lens having a liquid crystal layer provided between said first transparent substrate and said second transparent substrate and sealed by said first sealing material;
forming a finished lens by processing said blank lens; and
forming an edged lens by removing portions containing said second sealing material.
2. The edged lens manufacturing method according to claim 1 , further comprising the step of forming a filling layer between said first sealing material and said second sealing material.
3. The edged lens manufacturing method according to claim 1 , further comprising a third sealing material which contains a spacer member, and which is disposed in a region provided between said first transparent substrate and said second transparent substrate and located between said first sealing material and said second sealing material.
4. The edged lens manufacturing method according to claim 3 , wherein said third sealing material is colored.
5. The edged lens manufacturing method according to claim 3 , wherein edging is performed so that said third sealing material will remain in a beveled edge of said edged lens.
6. The edged lens manufacturing method according to claim 1 , further comprising the step of stacking said first transparent substrate and said second transparent substrate one on top of the other so that said first transparent substrate and said second transparent substrate are separated from each other by a gap that is larger at substrate edges than at a position where said sealing material is disposed.