METHOD OF MANUFACTURING OPTICAL FILM

• Main Authors: KAWAMOTO IKUO, YONEZAWA HIDEYUKI, TSUCHIMOTO KAZUKI, HADA KAZUYA
• Format: Patent
• Language: English
• Published: 23.01.2009
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A method of manufacturing an optical film has a rubbing step for rubbing the surface of a long plastic film (F) by a rubbing roll (4) around which a napped fabric is wound, an application step for applying liquid crystalline molecules to the surface of the film having passed the rubbing step, and a fixation step for fixing the applied liquid crystalline molecules. The rubbing step has a backup roll mechanism (5) for supporting and conveying the film by the use of a conveyor belt (3) that has a metal surface and supporting the lower surface of the conveyor belt. The backup roll mechanism has backup rolls (51) individually rotated in the moving direction of the conveyor belt. The backup rolls are disposed immediately beneath the rubbing roll, along a straight line substantially in parallel with the rotating axis of the rubbing roll.