| 摘要 |
A method for manufacturing a waveguide for a display apparatus comprising providing a planar optical waveguide part (24), depositing upon the optical waveguide part a fluid material (11) curable to form an optically transparent solid, impressing (40) upon the fluid material an impression defining an input diffraction grating region, and separately, an intermediate diffraction grating region and an output diffraction grating region, curing (45) the impressed fluid material to solidify said impression. The apparent location of the input diffraction grating is located wholly within the geographical area of the intermediate grating, and the grating vectors of the input diffraction grating and the intermediate diffraction grating are oriented in different respective directions. |
