OPTICAL SHEET, AND FRONT FILTER FOR PLASMA DISPLAY USING THE SHEET

PROBLEM TO BE SOLVED: To provide an optical sheet in which a blackened layer is less likely to fall off from an electromagnetic wave shield layer having a conductive layer pattern subjected to blackening, an electromagnetic wave shield layer having excellent external light antireflection properties is included, and insufficient adhesion of an adhesive layer conductive pattern layer is improved, and to provide a front filter for plasma display using the sheet.SOLUTION: The optical sheet consists of an electromagnetic wave shield layer having a conductive pattern layer containing conductive particles and resin binder formed in a predetermined pattern on a transparent substrate, and various functional layers laminated on the conductive pattern layer side with an adhesive layer interposed therebetween. A metal layer having a projecting end corner and a recessed central part is formed on the surface of the conductive pattern layer of the electromagnetic wave shield layer, and a blackened layer of an acicular metal is formed on the surface of the metal layer. A front filter for plasma display using the sheet is also provided.