In case of curved status, if you use ball spacer
to keep cell gap, the uniformity of cell gap
deteriorates when the ball is pushed to the outside.
The column spacer maintains
a stable cell gap even on curved surfaces.
Optiple Inc. has developed the element technology necessary for lamination of film cell on curved lenses.
Optiple has also developed automatic alignment technology which is necessary for lamination of film cell on curved lenses.