Abstract: A polymer film, wherein when any point in the polymer film is taken as a center, a maximum difference between high and low film thicknesses within a range of 60 mm diameter is not more than 1 ?m, an RMS value of a film thickness is 0 ?m to 0.15 ?m or a difference between maximum and minimum values of slow axis angle in any 60 mm×60 mm square in the polymer film is 0° to 0.40°; and a solution casting film-forming method comprising: casting a dope on a support; peeling the casted film, wherein a dry wind of 3 m/s to 15 m/s is applied to the casted film within 15 seconds from the casting, and wherein before the dry wind is applied to the casted film, an air floating on a surface of the casted film has a wind velocity of less than 3 m/s.

Abstract: A cellulose acylate film that has: an in-plane orientation coefficient fxy and a thickness-direction orientation coefficient fxz falling within a range represented by following relationships; and an in-plane retardation Re (?) falling within a range of 30 nm?Re (590)?200 nm and a thickness-direction retardation Rth (?) falling within a range of 70 nm?Rth (590)?350 nm at 25° C., 60% RH: |fxy|<0.15 |fxz|<0.15 wherein fxy and fxz are calculated from infrared absorption spectroscopy measurement data based on C?O expansion/contraction mode of a ester group, and wherein Re (?) represents an in-plane retardation (Re) value (unit: nm) at a wavelength of ? nm; and Rth (?) represents a thickness-direction retardation (Rth) value (unit: nm) at a wavelength of ? nm.

Abstract: A cellulose acylate film, which has an in-plane retardation (Re) and a retardation in a thickness direction (Rth) satisfying relations of equations (1) to (6) and has a thickness of 30 ?m or greater but less than 70 ?m: 20 nm<Re(548)<100 nm??(1) 100 nm<Rth(548)<400 nm??(2) 0.5?Re(446)/Re(548)?0.90??(3) 1.05?Re(629)/Re(548)?1.50??(4) 0.5?Rth(446)/Rth(548)?0.95??(5) 1.05?Rth(629)/Rth(548)?1.50??(6).

Abstract: A cellulose ester film has a front retardation Re of from 20 nm to 100 nm relative to light having a wavelength of 590 nm at 25° C. and 60% RH; a retardation Rth in a film thickness direction of from 60 nm to 400 nm relative to light having a wavelength of 590 nm at 25° C. and 60% RH; and a shrinkage factor in a slow axis direction of less than 1% in the range of from a glass transition temperature to a temperature of 40° C. higher than a glass transition temperature.