公开(公告)号：US11933985B2

公开(公告)日：2024-03-19

申请号：US17417175

申请日：2021-02-02

Applicant: Lumus Ltd.

Inventor： Ido Fuchs ,  Edgar Friedmann ,  Elad Sharlin ,  Kobi Greenstein ,  Lilach Zuaretz ,  Tsion Eisenffeld ,  Shimon Grabarnik ,  Amir Shapira ,  Dror Hermoni

IPC: G02B27/01 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B6/0028 ,  G02B6/0035 ,  G02B6/0065 ,  G02B6/0078 ,  G02B2027/0123 ,  G02B2027/0178

Abstract: A method for producing light-guide optical elements (LOEs) (16, 18, 56, 58) each having a set of mutually-parallel partially-reflecting surfaces (17) located between, and oriented non-parallel to, a pair of major external surfaces, and at least one region (30a, 30b, 30c) without partially-reflecting surfaces. The method includes bonding together parallel-faced plates (4) at interfaces to form a stack (42) of plates with partially-reflecting coatings between them. The stack is cut and polished to form a boundary plane (48, 48a, 48b) intersecting the interfaces, and a block (50, 50a, 50b) of transparent material is bonded to the stack. The resulting precursor structure (52, 52′) is sliced along parallel planes to form slices, each containing a part of the stack for the active region of the LOE and a part of the block.