Apparent biaxiality due to oriented defects in samples of lamellar liquid crystals

摘要

We study the apparent biaxiality of a sample of a lamellar liquid crystal in homeotropic orientation and containing oriented defects. The biaxiality is calculated in the case of edge dislocations parallel to each other. We show also that in lyotropic liquid crystals, light scattering is very weak and does not obliterate the conoscopic image. We also make a comparison with the experimental results of ref. [10].