PRODUCTION OF OPTICAL FILTER

摘要

PURPOSE:To reduce polymn. time by sandwiching a cholesteric liquid crystal by two sheets of substrates having light transmittability and subjecting the liquid crystal to a planar orientation them irradiating light from both sides of the substrates to effect photopolymn. CONSTITUTION:The cholesteric liquid crystal consisting of a soln. mixture composed of a polypeptide compd. and photopolymerizable monomer is sandwiched by two sheets of the substrate consisting of glass, polymer films, etc. and having light transmittability and after the liquid crystal is subjected to the planar orientation, the light is irradiated thereto from both sides of the substrate to accelerate the photopolymn. from the two sides of the substrate. The polymn. velocity is lower the further in the thickness direction of the film. The polymn. time is longer than twice when the thickness of the film is double- fold. If the light is irradiated from both sides of the substrates, the thickness at which the arrival of the light is required is 1/2 the thickness required when the light is irradiated from one substrate side. The time required for the production of the film is thus made shorter by as much as the decreased quantity of light.