Curved retarder-based optical filters

摘要

Curved polarization filters and methods of manufacturing such filters are described in the present disclosure. An exemplary method includes laminating a planar polarization layer to a planar retarder layer at a predetermined orientation and bending the laminate to create a curved filter. The strain on the retarder layer results in stress-induced birefringence, and the predetermined orientation of the retarder substantially compensates for the stress-induced birefringence. In some embodiments, the predetermination is based on mathematical models. In some other embodiment, the predetermination is based on experimental data.

主权项

1. A method for manufacturing a curved optical filter, the method comprising:
providing a drum having a curved surface; feeding a first optical film onto the drum at a first rate; feeding a second optical film onto an outer surface of the first optical film at a second rate; coating the outer surface of the first optical film or an inner surface of the second optical film with an adhesive; rotating the drum as the first and second optical films are being fed; and laminating the first and second optical films together using a press roller, whereby the laminated first and second optical films have a curvature.