Optisches Tiefpass-Filter aus Polymermaterial und Vorrichtung damit

摘要

Disclosed herein are a polymeric optical low-pass filter of the birefringent type, which can be provided as a light-weight and small-sized filter and produced with ease, a polymeric optical low-pass filter device including the polymeric optical low-pass filter and a production process thereof, and a composite optical filter including the polymeric optical low-pass filter. The optical low-pass filter comprises an optically anisotropic polymer film in which a displacement distance S between an ordinary ray and an extraordinary ray represented by the following equation (1) is 1-70 mu m: