| 摘要 |
A head-mounted display includes a light source, a light scanner, an emitter, and a two-dimensional diffraction grating. The light source emits light having an intensity corresponding to an image signal. The light scanner performs two-dimensional scanning with the light emitted from the light source to produce image light. The head-mounted display emits the image light from the emitter. The two-dimensional diffraction grating is provided at a position near an intermediate image plane located in an optical path between the light source and the emitter. The diffraction grating enlarges an exit pupil of the head-mounted display. The diffraction grating has a multistep structure with groove depth changes of at least three discrete levels.
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