| 摘要 |
A Head Up Display (HUD) for a windscreen 905 having spatially variant optical power, which is likely to result in distortions, wherein the display has a shaped diffuser 901 to compensate for the distortions of the windscreen. The HUD may include a projector (206, fig 2) for projecting images onto the diffuser. The HUD may have a mirror 903 with an optical power, or parabolic curvature, to redirect light from the diffuser onto the windscreen. The HUD may have a holographic projector with a Spatial Light Modulator (SLM) (204, fig 2) to apply a phase delay distribution to incident light, wherein the phase delay distribution has only phase-only data representing an object. The incident light may be in the form of a laser. In another aspect of application, a method of compensating for the spatially variant optical power of a windscreen is provided using the apparatus above. |
