| 摘要 |
Color separation gratings, color separation microlenses and imaging arrays are provided. A color separation grating includes a transparent grating material having a grating formed therein. The transparent grating material has a first surface configured to receive incident light and a second surface opposite the first surface. The second surface is configured to pass selective separated colors from the incident light corresponding to different diffraction orders. The grating is formed in the first surface and includes a number of steps in a grating period and a number of sub-steps formed on each step. A combination of the number of steps and the number of sub-steps are selected to correspond to a number of diffraction orders produced by the color separation grating.
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