Lumus Ltd.

Yeda Research and Develpment & Co. Ltd

Osram Opto Semiconductors Gmbh

Rafael Advanced Defense Systems Ltd.

Rafael Defense Systems Ltd.

Rafael-armament Development Authority Ltd.

Yochay Danziger

Elad Sharlin

Ronen Chriki

Tsion Eisenfeld

Naamah Levin

Eitan Ronen

Daniel Michaels

Jonathan Gelberg

Edgar Friedmann

Shimon Grabarnik

Asher Albert Friesem

Erez Hasman

Lilya Lobachinsky

Mordechai Gilo

Ann Russell

Nitzan Livneh

Amit Maziel

Shai Eisenberg

Ram Oron

Netanel Goldstein

Nir Davidson

Amir Shapira

Nehemia Miller

Motke Gilo

Alexander Chayet

Peter Kossev

David Mishne

Elad Axel Sharlin

A laser package including at least a first laser diode set having at least two laser diodes emitting light beams of a first color, at least a second laser diode set having at least two laser diodes emitting light beams of a second color, and a beam combiner.

Laser package and method for operating a laser package

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

A compact projector for use in a head-mounted display device consists of an illumination section, a relay section, and a numerical aperture expander (NAE). The illumination section includes one or more illumination sources, a scanner, and a focusing lens which converges light onto an image plane. The NAE receives light from the illumination section, expands the average numerical aperture of the light, and transmits the light to the relay section. The relay section includes optical elements which collimate light from the image plane onto an exit pupil. The projector may also be fitted with lateral-axis and/or vertical-axis stops which prevent stray light from passing through the exit pupil.

Compact projector for head-mounted displays

An optical waveguide combiner having an output coupler comprising an array of embedded partially reflective dielectric mirrors expanding and coupling a virtual, optionally color, image generated by a laser display engine into a user EMB, wherein the dielectric mirrors are configured having a wavelength band for each lasing band of the laser display engine that includes wavelengths of light in the lasing band and in a range of wavelengths over which the lasing band is expected to drift, a reflectivity angular range exhibiting a first reflectivity, a transmittance angular range exhibiting a second reflectivity less than the first reflectivity, and a see-thru angular transmittance range having high transmittance for natural light incident on the facets.

Mixed reality combiner

An optical system employs a waveguide including a first set of partially-reflecting surfaces ('facets') for progressively redirecting image illumination propagating from a coupling-in region towards a second region, and a second set of facets in the second region for progressively coupling-out the redirected image illumination towards the eye of a viewer. The first set of facets includes at least a first facet close to the coupling-in region, a third facet fare from the coupling-in region, and a second facet located on a medial plane between the first and the third facets. The second facet is located in a subregion of the medial plane such that image illumination propagating from the coupling-in region to the third facet passes through the medial plane without passing through the second facet.

Optical system

An optical device may include a first waveguide to receive and expand in a first dimension a first portion of guided image beams based on a first image field and provide a first plurality of expanded image beams; a second waveguide to receive and expand in the first dimension one of a second portion of guided image beams and a transmitted second portion of guided image beams corresponding to a second image field that is different from the first image field and to provide a second plurality of expanded image beams, the second waveguide to receive the first plurality of expanded image beams and provide a transmitted first plurality of expanded image beams; and a third waveguide to receive and expand in a second dimension the transmitted first plurality of expanded image beams and the second plurality of expanded image beams to provide a third plurality of expanded image beams.

Double-helix onto a single light-guide optical element (LOE)

An optical system includes a partial-internal-reflection rectangular light guide (PRLG) () having three surfaces supporting internal reflection and a partially-reflecting fourth surface () with which a second light guide portion () is associated. A light beam redirecting arrangement, typically including a set of embedded partially-reflecting surfaces (), in light guide portion () redirects light emerging from the PRLG towards a third light guide portion () that includes a coupling-out configuration (), such as a further set of partially-reflecting surfaces (), coupling-out light beams of an image towards the eye of a user.

Optical system for directing an image for viewing

An image projector includes a spatial light modulator (SLM) with a two dimensional array of pixel elements controllable to modulate a property of light transmitted or reflected by the pixel elements. An illumination arrangement delivers illumination to the SLM. A collimating arrangement collimates illumination from the SLM to generate a collimated image directed to an exit stop. The illumination arrangement is configured to sequentially illuminate regions of the SLM, each corresponding to a multiple pixel elements. A controller synchronously controls the pixel elements and the illumination arrangement so as to project a collimated image with pixel intensities corresponding to a digital image.

Image projector

An optical device includes a lightguide having a first pair of external surfaces parallel to each other, and at least two sets of facets. Each of the sets including a plurality of partially reflecting facets parallel to each other, and between the first pair of external surfaces. In each of the sets of facets, the respective facets are at an oblique angle relative to the first pair of external surfaces, and at a non-parallel angle relative to another of the sets of facets. The optical device is particularly suited for optical aperture expansion.

Light-guide optical element with multiple-axis internal aperture expansion

An image projector for injecting a collimated image into an entrance aperture of a lightguide employs collimating optics including a polarizing catadioptric arrangement to provide enhanced proximity of the principal plane of the collimating optics to the entrance aperture of the lightguide, thereby reducing the size of the optics or allowing an enlarged field of view for optics of a given size. Disclosed embodiments employ a front-lit polarization-modifying spatial light modulator (SLM) illuminated via a polarizing beam splitter (PBS) prism with a 30-degree or 45-degree PBS angle, laser scanning illumination arrangements, with or without an SLM, and active-matrix image generators combined via a dichroic combiner cube.

Image projector with polarizing catadioptric collimator

An optical device includes a first waveguide, having parallel first and second faces and parallel third and fourth faces forming a rectangular cross-section, that guides light by four-fold internal reflection and is associated with a coupling-out configuration that couples light out of the first waveguide into a second waveguide. The first or second face is subdivided into first and second regions having different optical characteristics. The optical device also includes a coupling-in configuration having a surface that transmits light into the first waveguide. The surface is deployed in association with a portion of the third or fourth face adjoining the second region such that an edge associated with the surface trims an input collimated image in a first dimension, and a boundary between the first and second regions trims the input collimated image in a second dimension to produce a trimmed collimated image that advances by four-fold internal reflection.

Optical aperture multipliers having a rectangular waveguide

An optical system may include (a) a light-guide optical element (LOE) formed from transparent material and having at least first and second mutually-parallel major external surfaces for supporting propagation of an image by internal reflection at the first and second major external surfaces, the LOE having a coupling-out arrangement for coupling out the image towards an eye of the user, the LOE having a coupling-in arrangement; and (b) an image projector comprising an image generator for generating an image and an image conjugate generator for generating a conjugate image, the image generator and the image conjugate generator disposed such as to project the image and the conjugate image, respectively, from directions not directly in front of the LOE.

Independent conjugate image generation optical systems

A light-guide optical element (LOE) includes a transparent substrate having two parallel major external surfaces for guiding light within the substrate by total internal reflection (TIR). Mutually parallel internal surfaces within the LOE are provided with a structural polarizer which is transparent to light polarized parallel to a primary polarization transmission axis, and is partially or fully reflective to light polarized perpendicular to the primary polarization transmission axis. By suitable orientation of the polarization axis of successive internal surfaces together with the polarization mixing properties of TIR and/or use of birefringent materials, it is possible to achieve the desired proportion of coupling-out of the image illumination from each successive facet.

Light-guide optical element employing polarized internal reflectors

Coated surfaces arranged in a stack assume a periodic formation having a sequence of segments including a first segment. The first segment has first, second, and third coated surfaces, and is repeated a set number of times to form the periodic formation. The stack is sliced to form a slice having two major external surfaces and adjacent sections each having coated surfaces from one segment between the two major external surfaces. The slice is cut to form at least one substrate from each section. Each substrate has two major surfaces and coated surfaces from a single segment of the periodic formation between the two major surfaces. In certain embodiments, the first coated surface reflects a first light color, the second coated surface transmits the first light color and reflects a second light color, and the third surface reflects a third light color and transmits the first and second light colors.

Optical devices having dichroic beam combiners, optical devices for use with dichroic beam combiners, and methods of manufacture therefor

A transparent substrate has two parallel faces and guides collimated image light by internal reflection. A first set of internal surfaces is deployed within the substrate oblique to the parallel faces. A second set of internal surfaces is deployed within the substrate parallel to, interleaved and in overlapping relation with the first set of internal surfaces. Each of the internal surfaces of the first set includes a first coating having a first reflection characteristic to be at least partially reflective to at least a first subset of components of incident light. Each of the internal surfaces of the second set includes a second coating having a second reflection characteristic complementary to the first reflection characteristic to be at least partially reflective to at least a second subset of components of incident light. The sets of internal surfaces cooperate to reflect all components of light from the first and second subsets.

Growing community of inventors

Kfar Vradim, Israel

Yochay Danziger