FERROELECTRIC LIQUID-CRYSTAL CELL

摘要

The cell has a chiral ferroelectric smectic liquid crystal between two transparent plates with electrodes for generating an electric field, and polarisers in front of and behind the liquid crystal, the ratio d/p of the thickness d of the liquid crystal layer to the pitch p of the helical twisting being larger than 5, the smectic tilt angle theta 0 being between 22.5 DEG and 50 DEG , and the product d. theta @. DELTA n.1/ lambda (phase factor) of the thickness d, the square of the tilt angle theta 0, the value of the birefringence DELTA n and the reciprocal of the optical wavelength lambda being larger than 0.45 mu m.