Patent ID: 11892677
Assignee: LUMUS LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  F

Claim 0:
1. A method of fabricating a compound light-guide optical element (LOE), comprising:
obtaining a stack of a plurality of LOE precursors, the stack having a first pair of parallel faces including first and second faces, each LOE precursor comprising a pair of major parallel surfaces and a first plurality of mutually parallel partially reflective internal surfaces angled obliquely relative to the pair of major parallel surfaces;
obtaining a first block having: a second pair of parallel faces including third and fourth faces, a second plurality of mutually parallel partially reflective internal surfaces, and a transparent plate bonded to the third or fourth face;
bonding together the first block and the stack such that an external surface of the transparent plate is joined to one of the first or second faces of the stack and the first plurality of partially reflective internal surfaces is non-parallel to the second plurality of partially reflective internal surfaces, thereby forming a second block; and
slicing out at least one compound LOE from the second block by cutting the second block through at least two cutting planes substantially parallel to the major parallel surfaces of the LOE precursors.