Head-up display

A head-up display comprising, inside a housing:

• an image-generating device configured to generate a light beam which passes through an optical output element,
• the light beam comprising a green component and a red component;
• a first reflector configured to reflect the light beam as an intermediate beam;
• a second reflector configured to reflect the intermediate beam as an output beam,
• the housing comprising an opening closed by a window through which the output beam passes,
• wherein the propagation of light through the optical output element, in reflection on the first reflector, in reflection on the second reflector and through the window, defines an optical path with two ends,
• wherein two elements from the optical output element, the first reflector, the second reflector and the window are provided, respectively, with a first spectral filter and with a second spectral filter,
• wherein the first spectral filter and the second spectral filter are configured to prevent the propagation, from one end to the other of the optical path, of a spectral component extending spectrally between the green component and the red component.