공간적 광신호 변조를 위한 액정디스플레이의 두께 불균일성 보상 및 그 광변조 특성

Compensation of the Thickness Nonuniformity in an LCD for Optical Spatial Light Modulation and its Optical Modulation Properties

For coherent optical information processing the thickness uniformity of the spatial light modulators(SLMs)is highly demanded. The liquid crystal display(LCD), which is commercialized as a pocket-sized television, is considered as one of the most cheap 2-dimensional SLM. But usually it has lack of thickness uniformity. Thus phase correction to compensate the thickness nonuniformity must be preceded before it is used as an SLM. In this paper relatively easy phase compensation method applicable to binary SLMs is discussed and experimentally verified by using the optical joint transformantion concept.