Novel polarizers using twisted nematic liquid crystal cells

Abstract

Electrically-controlled polarizers consiting of twisted nematic (TN) liquid crystal (LC) cells with different twisting angles and a polarizing film are developed to cut undesirable polarized light reflecting from a glass plate and a surface of water for picking up images. A fabricated polarizer using 45° and 90° TN-LC cells, which rotate polaization direction of incident light with 0°, 45°, 90° or 135°, can eliminate more than 80% of polarized light for all polarization angles.