| 摘要 |
PURPOSE:To obtain the optical phase plate which is homogeneous over a wide area with a simple method by applying a liquid crystalline high polymer directly on a uniaxially stretched plastic substrate and orienting the high polymer. CONSTITUTION:This optical phase plate is constituted of only the substrate 1 and the liquid crystalline high polymer layer 2. The substrate 1 consists of the uniaxially stretched plastic film. The sum of the retardation of the substrate 1 and the retardation of the liquid crystalline high polymer layer 2 is in a 0.5 to 1.5mum range and further, the substrate 1 and the liquid crystalling high polymer layer 25 are in direct contact with each other. A method of directly applying the liquid crystalline high polymer at the temp. above the glass transition temp. at which the liquid crystalline high polymer has flowability on the substrate or a method of dissolving the liquid crystalline high polymer in a solvent and applying or printing the polymer in the form of a soln. on the substrate is usable as the method of applying the liquid crystalline high polymer 2 on the substrate 1. The optical phase plate homogeneous over the large area is obtd. by the simple method in this way. |
