Head-up display

A head-up display comprising:

• an image-generating system;
• a projecting optical system comprising a common mirror and a folding mirror;
• wherein the image-generating system is configured to emit a first source light beam and a second source light beam that pass through an image plane;
• wherein the projecting system further comprises an element for redirecting beams by diffraction that is configured to deflect the first source light beam downstream of the image plane into a first intermediate beam directed toward the common mirror;
• wherein the folding mirror is configured to reflect the second source light beam downstream of the image plane into a second intermediate beam directed toward the common mirror;
• wherein the common mirror is configured to intercept and project the first intermediate beam and the second intermediate beam, to form a first virtual image at a first projection distance and a second virtual image at a second projection distance, respectively.