Articles including post-formed multilayer optical films with layers of at
least one strain-induced birefringent material, methods of manufacturing
such articles by post-forming multilayer optical films, and multilayer
optical films that are particularly well-suited to post-forming operations
are disclosed. The articles, methods and multilayer optical films of the
present invention allow for post-forming of multilayer optical films
including strain-induced index of refraction differentials while retaining
the desired optical properties of the multilayer optical films.
