Multi-color head-up display system

A multi-color optical display system for producing longitudinally color-corrected multi-colored images and presenting them for observation in combination with an observer's visual exterior view of an outside world scene, comprising:

• an image source providing a multi-colored image carried by multiple wavelengths of light propagating along an optical path;
• an optical combiner positioned so that an observer can see the exterior view through it and so that at least some of the multiple wavelengths of light reflect off the combiner to provide an image for observation by the observer;
• a lens positioned along the optical path between the combiner and the image source but out of the observer's direct exterior view, the lens receiving the multi-colored image, producing an intermediate image, and introducing longitudinal color aberrations into the multiple wavelengths of light as they propagate through the lens;
• and
• the combiner receiving the multiple wavelengths of light propagating from the lens, the combiner including multiple substrates having curved surfaces of different shapes and carrying reflective coatings of different wavelength selective properties so that the substrates cooperate to reflect the multiple wavelengths of light propagating from the lens to present to the observer a multi-colored final image superimposed on the outside world scene and substantially free from longitudinal color aberrations.