| 摘要 |
An optical device including a numerical-type diffractive optical element (DOE) and a birefringent layer, the DOE including a grating including a first grating region associated with a first image and a second grating region associated with a second image, wherein the first grating region includes grating elements with a first depth and wherein the second grating region includes grating elements with a second depth, such that the first depth is selected based on a first refractive index of the birefringent layer and wherein the second depth is selected based on a second refractive index of the birefringent layer. |
