The geometric waveguide is based on traditional optical design and manufacturing which implemented one-dimensional exit pupil expansion to accommodate larger interpupillary distance range. The actual pay may be higher depending on your skills, qualifications, and experience. This resin material needs to have high transparency within the visible wavelength range, and usually the same refractive index as the glass substrate used. Help | Contact Us Developed through an intensive collaboration, the new designs combine JBD's family of cutting-edge MicroLED projectors with the Dispelix LED - an industry-leading pantoscopic waveguide with an advanced nanotech coating. The results are verified by electromagnetic grating theory and applied to the construction of diffractive waveguide lenses with an improved overall efficiency. espoo, finland and shanghai, june 3, 2022 /prnewswire/ -- dispelix (espoo) - a pioneer in the design and manufacturing of next-generation diffractive waveguides - today announced it has been in a long-term partnership with respected ar light engine supplier jade bird displays (jbd) to develop a family of new reference designs for augmented As showcased in Figure 3 , light coupled into the waveguide through input grating (zone 1) directly goes into zone 3, where the 2D grating pillars can simultaneously expand the pupil into X and Y directions while releasing the light bit by bit to the viewers eyes. Work with Us. as a surface relief grating formed on a surface of a waveguide. The global Diffractive Waveguide market size is projected to reach US$ million by 2028, from US$ million in 2021, at a CAGR of % during 2022-2028. According to the difference in the periodic structures, the planar diffractive waveguide is divided into surface relief grating (SRG) waveguide and volume hologram grating (VHG) waveguide. Learn more at dispelix.com. distorsion, aberration with diffracting elements, Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. . The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive . In order to make it easier to explain, lets assume this angle is 45 degrees, which is just like a 45-degree mirror turning incoming light in X direction by 90 degrees into the Y direction. Lochn releases LBS-Based Diffractive Waveguide AR module. In other words, the orientation and depth of the valley enable light to bounce around and propel itself into the wearer's eyes. The rest of light rays will continue to propagate inside the waveguide until it bounces off the glass surface again. Almost all AR headsets today, including HoloLens 2 and Magic Leap One, use a diffractive waveguide. This reduces the color non-uniformity across the eye box. Diffractive waveguide providing a retinal image . In yet other examples, a diffractive filter may be integrated with a waveguide, e.g. However, there still exist some problems which need to be solved, in aspect of imaging, the most important one is dispersion problem resulting from DOE . enlarging, the entrance or exit pupil, Head mounted characterised by optical features, Diffraction optics, i.e. It can be used for monochrome smart eyeglasses development or it can be used in RGB waveguides with multiple input couplers for polychrome applications. In diffractive waveguide, the conventional optical elements are replaced by planar diffraction gratings. In particular, the invention is characterized by what is stated in the independent claims. In some embodiments, at each location of the diffractive optical element, the optical response of the diffractive optical element is unique with respect to other locations thereof. However, we are not satisfied with pupil expansion being limited in the horizontal direction (i.e. 03, 2021. Dispelix is an advanced waveguide designer and manufacturer, delivering next-generation visual solutions for both consumer as well as enterprise AR and MR wearables. 8. I E In some embodiments, the microstructure of the DOE is free from sections with a graded 3 profile, in particular free from lateral height slopes, which take the local height of the 2 microstructure and therefore the local efficiency of the DOE gradually to zero or close to S zero, or, alternatively take the height to the height of a neighboring grating contained by the waveguide element. Continuous change in the diffractive optical response means that a small change of > location of the DOE for incident light beam (in the order of feature size of the microstructure pattern) results in small change in the response for at least one wavelength. Approximately constant height herein means that the local height variation of the microstructure is less than 10 %. The glass substrate (the waveguide) is coated with a thin layer of resin first, then sent into the NIL machine where the grating pattern is transferred from the silicon master stamp to the resin, which reminds me of the old-fashioned seal wax stamp in GOT. A particular aim is to provide a diffractive waveguide element that allows for implementation of complex optical functions and which reduces the risk of beam fragmentation and/or power loss. In this way AR glasses not only can fit viewers with larger range of interpupillary distance, but also can provide greater compatibility for viewers with various face shapes and nose height. Holographix has successfully completed numerous complex diffractive waveguide projects for our customers over 10 years. High-efficiency switchable flat diffractive ophthalmic lens with three-layer electrode pattern and two-layer via structures 2007: Holographic injection locking of a broad area laser diode via a photorefractive thin-film device 2007: Hybrid polymersol-gel waveguide modulators with exceptionally large electro-optic coefficients 2007 an entirely continuous and a piecewise constant, diffractive optical elements Detailed Description of Embodiments Definitions The term "diffractive optical element" (DOE) refers to a zone of the waveguide body comprising a physical structure capable of diffracting light. Local height of the microstructure is herein defined, applying to non-periodic and irregular diffractive structures as well as to periodic and regular diffractive structures, as the height difference between a lowest and highest point of the microstructure (lowest valley to highest peak) in the normal direction of the waveguide plane within a circular area having a diameter of 5 um. In some embodiments, the waveguide is a display waveguide of a diffractive personal display, such as a head mounted display (HMD) or head-up display (HUD), and the diffractive optical. For diffraction grating instead, this ratio can be controlled by the grating parameter such as duty cycle or geometry, which can be easily written in the mask of lithography or holography and printed onto the grating thin film through one-time exposure. In this context, traditional gratings or zones thereof, in which the same grating unit (like a binary ridge/groove) repeats with a regular period, even if being height-modulated in order to change diffraction efficiency locally, are considered periodic structures. There has been no consumer-grade product yet in the market, leaving the mass production capability as an unknown factor. 140 Locke Drive, Suite A Analysis and fabrication of analog surface profiles in non-paraxial diffractive optics. Which is Right For You? Such waveguides can be used in personal display devices, such as head-mounted displays (HMDs) and head-up displays (HUDs). Another approach to realize 2D EPE is directly using a 2D grating, whose periodicity lies in both X and Y directions. Correspondingly the mass production capability has already been proved by the mainstream AR products in the market such as Hololens I and II, Magic Leap One, etc. In addition, the two-dimensional exit pupil expansion using either turn grating or 2D grating enables more coverage of user population in the vertical direction (such as face topology and nose bridge height) in addition to the interpupillary distance coverage. The mainstream products in the market adopt the surface relief grating structure, whose manufacturability was proven by the consumer-grade products with Hololens II reaching 52-degree FOV. Sep 5, 2019 - DigiLens Inc. A projection display device comprising a light source and an SBG device having a multiplicity of separate SBG elements sandwiched between transparent substrates to which transparent electrodes have been applied. In particular, the invention relates to waveguides comprising at least one diffractive optical element for modifying the light field in the waveguide. Basic Schematic of Optical Waveguide System Functions of the Diffractive Gratings: -Couple light into waveguide plate and couple light out of plate into eyes -Wavelength selection -Wavefront reshaping Gratings must be designed properly so that the optical system produces good images Near-Eye-Display (NED) Systems -1 1 0 0 TIR TIR By the most conservative estimates of global Diffractive Waveguide market size (most likely outcome) will be a year-over-year revenue growth rate of % in 2021, from US$ million in 2020. In alternative embodiments, there is within the DOE a plurality of approximately constant height regions with different non-zero microstructure heights, the diffractive optical response from one region to another changing continuously. Publication: Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series Waveguide are used in augmented reality glasses. This report aims to provide a comprehensive presentation of the global market for Diffractive Waveguide Lens, with both quantitative and qualitative analysis, to help readers develop business/growth strategies, assess the market competitive situation, analyze their position in the current marketplace, and make informed business decisions regarding Diffractive Waveguide Lens. lenses, mirrors, prisms or other diffraction gratings, Plural gratings positioned on the same surface, e.g. However, it should be noted that in the present invention, to achieve the continuous transition, all or part of the DOE can be non- periodic, whereby the term DOE herein covers also other structures than gratings (in the sense that the term "grating" is usually understood as a periodic structure). This is similar to the 1D EPE in the X direction shown in Figure 3 (a). The diffractive waveguide benefits from the advancement in micro/nano-structures and flat optics, which can realize two-dimensional exit pupil expansion. In the polychrome module projector, an x-cube prism is used to combine images from three individual monochrome panels attached to the faces of the X-cube prism. With a fab established in Shanghai CHINA, JBD is considered as one of the leaders in microLED display technologies with its portfolio of active matrix microLED displays. "We are currently expanding our production facilities to support the unprecedented demand for our MicroLED displays and projectors. When typing in this field, a list of search results will appear and be automatically updated as you type. A diffractive microstructure pattern of the DOE generates the diffractive > optical response. Examples of DOEs commonly used in conventional personal display devices are in-coupling gratings, exit pupil expander gratings and out-coupling gratings. Optimizing Waveguide Outcoupling Gratings for Uniform Multiple Channels "Working with a manufacturer of JBD's reputation for light engine innovation means that a wide range of ODM/OEM manufacturers can at last enter the burgeoning AR eyewear market with an extraordinary and differentiated set of different reference designs. Five Augmented Reality Uses That Solve Real-Life Problems. Holographix build-to-specification philosophy allows each of our customers to leverage our waveguide fabrication expertise for their specific application. Marlborough, MA 01752, (978) 562-4474 First, a multi-region DOE without sharp interfaces between the regions allows for implementation of waveguides having complex optical behavior but without the drawback of beam fragmentation. Collaborate with the Engineered Optics teams and deliver total solutions to our customers in . To illustrate the continuously changing diffractive optical response in the waveguide plane, an exemplary response is shown. FI, Kind code of ref document: The intermediate DOE is adapted to change the distribution of propagating light power between the layers, according to its local diffractive optical response. LO characterized in that the optical waveguide is a waveguide according to any of the > preceding claims. espoo, finland and shanghai, june 3, 2022 /prnewswire/ -- dispelix (espoo) - a pioneer in the design and manufacturing of next-generation diffractive waveguides - today announced it has been. Doesnt this phenomenon look familiar to you? Developed through an intensive collaboration, the new designs combine JBD's family of cutting-edge MicroLED projectors with the Dispelix LED - an industry-leading pantoscopic waveguide with an advanced nanotech coating. 2. This variation in coating process is very tedious and could undermine the overall yield. The bright and dark fringes will cause different levels of exposure inside the thin film, creating a refractive index contrast n so as the periodicity of diffraction grating. According to one aspect, the invention provides a method of manufacturing an optical waveguide as herein described. Each diffraction order will continue to propagate along a different direction, including reflective diffraction (R0, R1, R2, ) and transmissive diffraction (T0, T1, T2,). If we transfer the concept into diffractive waveguide, as shown in Figure 3 (a), we can use input grating to couple light into the waveguide, and then replace the mirror array with an output grating to couple light out of the waveguide. Thus we think for now diffractive waveguide, more specifically with surface relief grating as the diffraction elements, is the best choice by far for AR glasses to enter the consumer market. The method comprises first determining the diffractive patterns as discussed above and then manufacturing the waveguide having a diffractive optical element composed of the diffractive patterns determined. Its mentioned in Part I of this article that geometric waveguide uses tranflective mirror array to realize one-dimensional exit pupil expansion (1D EPE). If there is a breakthrough in material engineering to increase its refractive index contrast so as to boost up the optical parameters, the potential in mass production might even be higher. Join The LaSAR Alliance. Two-dimensional (2D) exit pupil expansion, as a key technology for near-to-eye display, can be realized by using diffractive gratings. The structure typically comprises a pattern of features having a size of 1 um or less. comment sorted by Best Top New Controversial Q&A Add a Comment Not only is this inefficient, but it gives the glowing eyes cyborg effect. Dispelix's LED waveguide is a truly innovative solution and at first light with our AmLED polychrome MicroLED projector we knew we had a compelling solution. The diffractive waveguide benefits from the advancement in micro/nano-structures and flat optics, which can realize two-dimensional exit pupil expansion. In some cases, the DOE is non-periodic over the whole element. Alexander Buttner. The DOE can also be an intermediate power redistribution element (intermediate DOE) between a plurality of waveguide layers. Because of this difference, when the light rays encounter with the output grating and get coupled out of the grating (as indicated by the arrows toward the eye for illustration purpose only in Figure 4 (a)), the blue color will be coupled out 3 times, green twice, and red only once. Another type is volumetric holographic grating which is progressing in parallel. The light passes through the waveguide and is extracted at the exit pupil through a second slanted grating, the out-coupler. This has the drawback that boundary zones between two grating regions cause significant distortion to the light field, as the beam is split every time it hits such boundary zone, and light power is lost to stray angles. According to the invention, the diffractive optical element is a multi-region element comprising a plurality of regions with different diffractive optical responses. Best place to learn about AR& VR. This is in contrast to systems with clearly defined sub-regions, where misalignments of the beams can lead to dramatic changes in overall output. By continuing to use our site, you accept our use of cookies. In such an example, a second waveguide (not shown) may be adhered to an opposite side of the diffractive filter as waveguide 702. ", "Dispelix is very excited to finally unveil our partnership with JBD the end result of joint R&D activities that are enabling the next-generation of AR eyewear," said Jussi Rahomaki, Chief Product Officer for Dispelix. The fabrication process starts with the micro/nano-fabrication used in the traditional semiconductor microelectronics industry, where electron beam lithography (EBL) and ion beam etching create the silicon master stamp. On the other hand, coherence of laser light and small beam size create new challenges for diffractive waveguides. Typically diffractive beam splitters are used in combination with a focusing lens. All three companies will . The continuous changing of the diffractive optical response takes place between the regions with smooth transitions. This design uses a thin layer of surface relief grating (SRG), which is a series of laser-cut valleys on the surface of the lens: see (b) in the picture below. The polychrome projector is only 1.3cc in volume, has a FOV of 30 & weighs nominally 2.3 grams. 10. "Working with a manufacturer of JBD's reputation for light engine innovation means that a wide range of ODM/OEM manufacturers can at last enter the burgeoning AR eyewear market with an extraordinary and differentiated set of different reference designs. During transportation as shown in Figure 2, assuming the incident light enter! Way, its equivalent to the conventional optical elements in many modern display! Geometric or array waveguide fill out the contact form below: //www.sciencedirect.com/science/article/pii/S0141635919305094 '' > < > Grating structure which combines the functionalities of the corresponding waveguides are a viable alternative for the fabrication of low-weight devices Be smaller especially in the neighborhood of the invention the invention waveguides are discussed in the optoelectronics related! 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