| 摘要 |
<p>A head-up display (10) comprises a display device (11) for generating information to be presented to an operator (15) in superimposition with his forward view of the outside world (16), via an off-axis reflectively-powered combiner optic (14) for effecting said superimposition and a relay optic (12, 18) between the display device (11) and the combiner optic (14). The relay optic (12, 18) forms an intermediate image (13) of the displayed information in advance of the combiner optic (14) and the combiner optic (14) collimates the intermediate image for delivery to the operator (15) and re-images the aperture stop formed by the relay optic (12, 18) as an exit pupil at the operator's eye position (20). The relay optic (12, 18) comprises a relay lens (12) and an axis deviation arrangement (18), having a pair of surfaces (A, B) preferably formed of holograms which are mutually inclined at an acute angle each surface (A, B) being both transmissive and reflective according to the angle of incidence of light thereon.</p> |
