| 摘要 |
PCT No. PCT/SE95/00455 Sec. 371 Date Dec. 22, 1995 Sec. 102(e) Date Dec. 22, 1995 PCT Filed Apr. 25, 1995 PCT Pub. No. WO95/29428 PCT Pub. Date Nov. 2, 1995A liquid crystal welding glass structure whose density increases when welding is commenced includes two liquid crystal cells which are mounted between polarization filters which have an extinguishing effect on one another. When mounting the filters, the filters are turned so that their respective angular dependencies on the optical density counteract one another. With the intention of improving this compensating effect, the brushing/rubbing of the mutually opposing limiting walls which determine the direction of the molecules is limited to at least one of the component cells whose relative angular displacement differs from 90 DEG and is smaller than or coincident with 85 DEG . The angle is preferably between 20 DEG and 85 DEG . |
