OPTICAL SHEET MANUFACTURING METHOD AND OPTICAL SHEET MANUFACTURING DEVICE

摘要

PURPOSE: A method for manufacturing an optical sheet and apparatus for manufacturing an optical sheet are provided to measure the optical property of an optical sheet through all width direction by receiving reflection light or transmission light from the sheet shaped material of irradiated light in a light accepting process. CONSTITUTION: A transmission part(2) consecutively transmits a sheet shaped material with a long length. A heat treatment part(3) consecutively performs a heating process for a sheet shaped material which is transmitted. A winding part(4) consecutively reels a sheet shaped material which is processed by heat in the heat treatment part. A light receiving part(6) receives transmission light which transmits a material. An output part(7) determines whether a heating condition is need to be changed in a heating process or not. The output part outputs a need for varying the heating condition when the change of the heating condition is determined to be needed.