| 摘要 |
A heads up display (HUD (12)) system that includes a light source (14) configured to project an image (20), and a diffractive combiner (16). The diffractive combiner (16) includes one or more reflective volume phase gratings (RVPG (26)), each configured to reflect light from the light source (14) having a distinct wavelength toward a HUD viewer (22). Each RVPG (26) is also embossed with a pattern configured to diffract light at the distinct wavelength so the HUD viewer (22) can see an image (20) in a field of view (24) that passes through the diffractive combiner (16). By forming a diffractive combiner (16) with an RVPG (26) embossed with a particular pattern, the occurrence of rainbow artifacts on the surface of the diffractive combiner (16) caused by random sources of light is reduced.
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