Konica Minolta, Inc.

Kenji Mishima

Kouji Tashiro

Rieko Ren

Norie Tanihara

Yukihito Nakazawa

Midori Kogure

The retardation film has a slow axis with an angle of 10 to 80&#xb0; with respect to a longitudinal direction thereof and contains cellulose acylate having a degree of acyl substitution of 2.0 to 2.7 and a regulating agent. The retardation film has an in-plane retardation, measured at a wavelength of 550 nm, Ro550, of 115 to 260 nm. The retardation film has a &#x394;Ro is 3 to 30 nm, where &#x394;Ro is Ro550&#x2212;Ro450, where Ro450 is the in-plane retardation of the film measured at a wavelength of 450 nm. The retardation film without the regulating agent has an in plane retardation, measured at a wavelength of 550 nm, Rc550, and &#x394;Rc(Rc550&#x2212;Rc450) equal to or greater than 0, where Rc450 is the in-plane retardation measured a wavelength of 450 nm.

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Tokyo, Japan

Kenji Mishima