Method of making a roll of the optical film and an optical film

An exemplary method includes the steps of providing a film comprising at least one polymeric material, the first draw step along the cross-web direction to be lower as the plane birefringence caused in the film is even a series of a step of widening the first processing conditions the film, and a step of stretching pulling the film at a second draw step along a series of second processing conditions down web direction, a series of second processing conditions, resulting in-plane birefringence in at least one polymeric material. Roll exemplary film includes an alignment optical film characterized in effective orientation axis. Oriented optical film, only one birefringent polymeric material comprises at least one birefringent material and at least one isotropic material, or the first birefringent material and a second birefringent material, the birefringent material, the MD wherein the effective orientation axis along. The optical film has a length exceeding the width and 10m more than 0.3 m.