There is provided a head-up display for a vehicle, the head-up display comprising: a picture generating unit arranged to generate a picture on a light receiving surface; and an optical system arranged to image the picture, wherein the optical system comprises: an input arranged to receive light of the picture; an output arranged to output light forming an image of the picture; a first mirror and second mirror arranged to guide light from the input to the output along an optical path, wherein the optical path comprises: a first optical path from the input to the second mirror including a transmission through the first mirror; and second optical path from the second mirror to the output including a reflection off the first mirror.