| 摘要 |
An apparatus and method by which an image is projected to pupils of a viewer Preferably, the image covers only areas occupied by the pupils and tracks the areas occupied by the pupils such as to provide continuous display of the imagery to a viewer The method is to dynamically control the direction of light into sub-apertures selected by a tracking device By imaging selectively into the sub- apertures where the pupils are temporally located instead of imaging into a generally large area, the disclosed apparatus is power efficient and exclusive because the projected images are covert This method is applicable to most biocular displays, for instance, but not limited to "see through" systems, which overlay imagery over real world scenes and where geometrically precise projection is critical In one embodiment, the pupil scan apparatus is combined with a retinal scan apparatus to provide security.
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