| 摘要 |
A method of fabricating an optical film is provided. The method includes nipping a film composed of a molten polycarbonate resin extruded in a film-forming manner from a die attached to an extruder, between a temperature-preset molding roll having an engraving pattern on the surface thereof and a temperature-preset elastic roll, and thereby transferring the engraving pattern onto the film; and allowing the film having the engraving pattern transferred thereon to travel around the molding roll, and then separating the film from the molding roll. In the method, a preset value of a surface temperature of the molding roll is adjusted within a range of Tg+20° C. or above and Tg+45° C. or below, where Tg is a glass transition temperature of the film, and a preset value of a surface temperature of the elastic roll is adjusted to Tg or below.
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