HEAD-UP DISPLAY AND VEHICLE

A head-up display and a vehicle are disclosed. The head-up display includes an image generating device and an optical module. The optical module includes at least a first optical component, a second optical component, and a third optical component. The image generating device emits a first projection light to the first optical component. The second optical component receives the first projection light reflected or transmitted by the first optical component and changes a polarization direction of the first projection light to obtain a second projection light, and reflects the second projection light back to the first optical component. The third optical component receives the second projection light reflected or transmitted by the first optical component and changes a polarization direction of the second projection light to obtain a third projection light, and reflects the third projection light back to the first optical component.