Lumus Ltd.

Edgar Friedmann

Yaakov Amitai

Yochay Danziger

Elad Sharlin

Tsion Eisenfeld

Kobi Greenstein

Ronen Chriki

Eitan Ronen

Shimon Grabarnik

Yuval Ofir

Dror Hermoni

Amir Shapira

Meir Tzion Bitan

Ido Fuchs

Lilach Zuaretz

Tsion Eisenffeld

A stack has first and second faces and multiple LOEs that each has two parallel major surfaces and a first plurality of parallel internal facets oblique to the major surfaces. A first block has third and fourth faces and a second plurality of parallel internal facets. The first block and the stack are bonded such that the second face joins the third face and the first and second facets are non-parallel, forming a second block. The second block is cut at a plane passing through the first face, forming a first structure having an interfacing surface. A third block has fifth and sixth faces and a plurality of parallel internal reflectors. The third block and the first structure are bonded such that fifth face joins the interfacing surface and the internal reflectors are non-parallel to all the facets, forming a second structure. Compound LOEs are sliced-out from the second structure.

Methods of fabrication of compound light-guide optical elements having embedded coupling-in reflectors

A method of fabricating an optical aperture multiplier is provided. A slice and a first optical structure are obtained. The slice has external faces including a pair of parallel faces, and a first plurality of partially reflective internal surfaces oblique to the pair of parallel faces. The first optical structure has external surfaces including a planar coupling surface, and a second plurality of partially reflective internal surfaces oblique to the coupling surface. The slice is optically coupled with the first optical structure such that one of the faces of the pair of parallel faces is in facing relation with the coupling surface to form a second optical structure. At least one optical aperture multiplier is sliced from the second optical structure by cutting the second optical structure through at least two cutting planes perpendicular to the coupling surface. The optical aperture multiplier is preferably part of a near eye display augmented reality system.

Methods of fabrication of optical aperture multipliers having rectangular waveguide

A method for producing light-guide optical elements (LOEs) () each having a set of mutually-parallel partially-reflecting surfaces () located between, and oriented non-parallel to, a pair of major external surfaces, and at least one region () without partially-reflecting surfaces. The method includes bonding together parallel-faced plates () at interfaces to form a stack () of plates with partially-reflecting coatings between them. The stack is cut and polished to form a boundary plane () intersecting the interfaces, and a block () of transparent material is bonded to the stack. The resulting precursor structure (′) 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.

Method for producing light-guide optical elements

A light-guide device includes a light guiding element () with a number of faces, including two parallel faces (), for guiding light by internal reflection. A transparent optical element () has an interface surface for attachment to a coupling surface () of the light guiding element, and is configured such that light propagating within the transparent optical element passes through the interface surface and the coupling surface () so as to propagate within the light guiding element (). A non-transparent coating () is applied to at least part of one or more faces of the light guiding element (), defining an edge () adjacent to, or overlapping, the coupling surface () of the light guiding element (). A quantity of transparent adhesive is deployed between the coupling surface and the interface surface so as to form an optically transmissive interface. An overspill regionof the adhesive extends to, and overlaps, the edge ().

Light-guide device with optical cutoff edge and corresponding production methods

An optical device has a light-transmitting substrate, an optical coupling-out configuration, and an optical arrangement. The light-transmitting substrate has at least two major surfaces and guides light by internal reflection between the major surfaces. The optical coupling-out configuration couples the light, guided by internal reflection, out of the light-transmitting substrate toward an eye of a viewer. The optical arrangement is associated with at least one of the two major surfaces, and has a first optical element and a second optical element. The optical elements are optically coupled to each other to define an interface region associated with at least a portion of the coupling-out configuration. The interface region deflects light rays that emanate from an external scene that are incident to the optical arrangement at a given range of incident angles.

Optical devices for mitigating ghost images

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.

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Sdey-Avraham, Israel

Edgar Friedmann