公开(公告)号：US10895679B2

公开(公告)日：2021-01-19

申请号：US15939285

申请日：2018-03-29

Applicant: LUMUS LTD

Inventor： Yuval Ofir ,  Edgar Friedmann ,  Meir Tzion Bitan

IPC: F21V8/00 ,  G02B27/10 ,  G02B27/00 ,  G02B27/14 ,  G02B27/01

Abstract: An optical structure and corresponding process of manufacture for light guide optical elements (LOEs) which guide light by reflection at major surfaces. The structure further includes light directing surfaces for coupling light out of the LOE, obliquely inclined with respect to the major surfaces. The optical structure is formed from a stack of multiple optically transparent layers each of which has a surface pattern of regions configured as light directing surfaces which are arranged in an X-Z plane in a spaced-apart relationship along at least the X-axis with optically transparent regions between them. The layers are stacked along a Y-axis so that each of the surface patterns is located at an interface between two adjacent layers and the patterns of the layers are aligned with a shift of a predetermined value along one or both of the X-axis and Z-axis.

公开(公告)号：US20180292599A1

公开(公告)日：2018-10-11

申请号：US15939285

申请日：2018-03-29

Applicant: LUMUS LTD

Inventor： Yuval OFIR ,  Edgar Friedmann ,  Meir Tzion Bitan

IPC: F21V8/00

Abstract: An optical structure and corresponding process of manufacture for light guide optical elements (LOEs) which guide light by reflection at major surfaces. The structure further includes light directing surfaces for coupling light out of the LOE, obliquely inclined with respect to the major surfaces. The optical structure is formed from a stack of multiple optically transparent layers each of which has a surface pattern of regions configured as light directing surfaces which are arranged in an X-Z plane in a spaced-apart relationship along at least the X-axis with optically transparent regions between them. The layers are stacked along a Y-axis so that each of the surface patterns is located at an interface between two adjacent layers and the patterns of the layers are aligned with a shift of a predetermined value along one or both of the X-axis and Z-axis.