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US 11,536,975 B2Granted
Overlapping facets
AssigneeLumus Ltd.
InventorsYochay Danziger, Tsion Axel Eisenfeld
Life of this patent
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Abstract
Specific management of configuration of overlap of facets reduces non-uniformity in an image outcoupled toward a nominal point of observation. A waveguide including at least two parallel surfaces, first, middle, and last partially reflecting facets are configured such that in a geometrical projection of the facets onto one of the surfaces the facets overlap, preferably with adjacent facets overlapping and non-adjacent facets starts and ends coinciding along at least a portion of the waveguide.
Claims4
A method for producing a light-guide optical element (LOE) comprising:
- (a) providing a stack of parallel-faced plates bonded together at interface planes and having partially-reflecting coatings applied at said interface planes;
- (b) slicing said stack along a pair of parallel major slicing planes to form a slice, said major slicing planes being non-parallel to said interface planes so that said slice includes parts of a plurality of said interface planes providing internal partially-reflecting facets within said slice;
- (c) cutting said slice perpendicular to said major slicing planes to form at least one end surface;
- and
- (d) assembling the LOE by attaching at least one additional block of transparent material to said at least one end surface and sandwiching said slice and said at least one additional block of transparent material between two face plates.
2 more elements
Dependencies are inferred from the claim text.