| 摘要 |
Light diffusing sheet material, for example for projection screens, is produced by deforming a sheet of light diffusing material along at least one axis in the plane of the material. By stretching the material along a single axis, for example, a light diffusing material having asymmetric light-diffusing characteristics can be produced. By stretching the sheet material bi-axially, the light-spreading effect, or angle of view, of the sheet material can be changed. Preferred starting light diffusing materials include materials incorporating arrays of graded refractive index lenses and materials comprising particles with one refractive index embedded in a matrix of another refractive index. |
