The invention provides an optical film prepared by laminating at least one of
a first retardation film (2), having a mean in-plane refractive index of
no and refractive index in the thickness direction of ne wherein
ne-;no0, and at least one of a second retardation film
(3) having an in-plane refractive index of nx in the direction
showing the maximum refractive index, refractive index of ny in the
direction perpendicular to the direction described just before, and refractive
index in the thickness direction of nz wherein nxnynz.
The light leakage occurred as the observation point is tilted from the front direction
to a direction different from the direction of each absorption axis can be reduced
when a plolarizing film is arranged so that the absorption axes will be perpendicular
to each other.
