| 摘要 |
An optical system for use in a head-mounted display is provided which includes a microdisplay ( 4 ) and a magnifier ( 10 ) for producing a magnified image of the microdisplay for viewing by a human eye. The magnifier ( 10 ) includes a diffractive surface and has in order: a first element ( 1 ) having a first surface (S 1 ) which is convex in the direction of the long conjugate, a block ( 3 ) of optical material, and a second element ( 2 ) having a second surface (S 2 ) which is convex in the direction of the short conjugate. The first surface (S 1 ) is preferably the diffractive surface. The magnifier provides a long eye relief, a large exit pupil, and a large field of view with a minimum of components. |
