1.Introduction Microsoft HoloLens, known under development as Project Baraboo, is a pair of mixed reality head-mounted smartglasses developed and manufactured by Microsoft. HoloLens is essentially a holographic computer built into a headset that lets you see, hear and interact with holograms within an environment such as a living room or an office space. It is based on Augmented reality, Augmented reality (AR) is a live direct or indirect view of a physical, real-world environment whose elements are augmented (or supplemented) by computer-generated sensory input such as sound, video, graphics or GPS data. The history of augmented reality can be traced back to 1990 and work undertaken by Professor Tom Caudell as part of a neural systems project at Boeing. This project was focused upon finding new ways to help the company's engineering process and involved the use of virtual reality. Augmented reality is the blending of virtual reality and real life, as developers can create images within applications that blend in with contents in the real world. With AR, users are able to interact with virtual contents in the real world, and are able to distinguish between the two. Virtual Reality or Virtual Environments is a computer simulated environment that gives the user the experience of being present in that environment. It is a 3- Dimensional computer generated environment. VR provides the effects of a concrete existence without actually having a concrete existence. VR not only provides immersions of vision but also of sound and tactile feedback. Basically, VR is a theory based on the human desire to escape the real world boundaries and this is done by embracing the cyber world. It is a new form of human machine interaction that is beyond keyboard, mouse or even touch screen for that matter. It is a means by which one can interact with full visual immersion. 2. 3D Holographic Technology Holography is a diffraction-based coherent imaging technique in which a complex three-dimensional object can be reproduced from a flat, two-dimensional screen with a complex transparency representing amplitude and phase values. It is commonly agreed that real-time holography is the ne plus ultra art and science of visualizing fast temporally changing 3-D scenes. The integration of the real-time or electro- holographic principle into display technology is one of the most promising but also challenging developments for the future consumer display and TV market. Only holography allows the reconstruction of natural-looking 3-D scenes, and therefore provides observers with a completely comfortable viewing experience. A HoloLens will use holographic technology to project large-scale, high-resolution images onto a variety of different surfaces, at different focal distances, from a relatively small-scale projection device. To understand the technology used in HoloLens, we must understand the term ‘Hologram’, and the process of making and projecting holograms. Holography is a technique that allows the light scattered from an object to be recorded and later reconstructed. The technique to optically store, retrieve, and process information. The holograms preserve the 3-D information of a holographed subject, which helps to project 3D images. 2.1. Holograms A hologram is a physical component or device that stores information about the holographic image. For example a hologram can be a grating recorded on a piece of film. It is especially useful to be able to record a full image of an object in a short exposure if the object or space changes in time. Holos means “whole” and graphein means “writing”. Holography is a technique that is used to display objects or scenes in three dimensions. These 3D images are called Holograms. A Photographic record produced by illuminating the object with coherent light (as from a laser) and, without using lenses, exposing a film to light reflected from this object and to a direct beam but in other diverse environments and technologies as well. which is an advantage no other 3D technology can show. A particular advantage would be afforded if the need could be fulfilled to provide such simultaneous viewing in which each viewer could be presented with a uniquely customized autostereoscopic 3D image that could be entirely different from that being viewed simultaneously by any of the other viewers present. When interference patterns on the film are illuminated by the coherent light a three-dimensional image is produced. 3. Another feature is that these are glasses free 3D display. New excitement. followed by the fascinations of holography. The projections are projected into midair. so the limitations of screen are not applicable for 3D holographic display. Modern three-dimensional (”3D”) display technologies are increasingly popular and practical not only in computer graphics.1. Microsoft HoloLens HoloLens is essentially a holographic computer built into a headset that lets you see. This 3D technology can accommodate multiple viewers independently and simultaneously. interest.of coherent light. The public has embraced this experience since at least the days of stereoscopes. and most recently the advent of virtual reality. The 3D holographic technology does not need a projection screen. hear. A high resolution three dimensional recording of an object. and enthusiasm then came with the 3D movie craze in the middle of the last century. 3. Recent developments in computers and computer graphics have made spatial 3D images more practical and accessible. A concurrent continuing need is for such practical autostereoscopic 3D displays that can also accommodate multiple viewers independently and simultaneously. at the turn of the last century. Advantages of Holographic Projection The interest in 3D viewing is not new. and all with complete freedom of movement therein. Microsoft has built the headset without the need to be wirelessly . and interact with holograms within an environment such as a living room or an office space. all within the same viewing environment. with a natural user interface that . phones or computers needed. and spatial sound to allow for augmented reality applications.1. eyes. Microsoft HoloLens is a smart-glasses headset that is a cordless. and has used high-definition lenses and spatial sound technology to create that immersive.connected to a PC. Basically HoloLens is a high-tech computer system that can be wearable and works according to your gestures with hands. It's cutting edge stuff. etc. The premier device for Windows Holographic. This is the first holographic computer which is running on Windows 10. 3. Fig. 3. a high-definition stereoscopic 3D optical head-mounted display. but it's not quite that advanced yet. self-contained Windows 10 computer.1 (HoloLens) As seen in above fig. It is completely unattached as no wires. The HoloLens comes with semitransparent holographic lenses which 'generate multi- dimensional full-colour holograms'. It uses various sensors. That is actual picture of wearable augmented reality from Microsoft named by HoloLens. interactive holographic experience. That means it's not going to be projecting images into a room that everyone can see. it is a computer itself. 2016. Companies such as Samsung Electronics and Asus had expressed interest in working with Microsoft to produce their own mixed-reality products based on HoloLens. 2016. Microsoft has targeted HoloLens for release "in the Windows 10 timeframe. iOS and OS X on April 5. Codenamed "Project Baraboo. Microsoft has not set a time frame for consumer availability of HoloLens. and hand gestures. voice. such as Android. ." with the Microsoft HoloLens Development Edition to begin shipping March 30. but was conceived earlier as the original pitch made in late 2007 for what would become the Kinect technology platform." HoloLens had been in development for five years before its announcement in 2015. with HoloLens chief inventor Alex Kipman stating that HoloLens will have a consumer release only when the market is ready for it.the user interacts with through gaze. It was introduced with operating systems. battery. and are pinned or anchored to the world around you. To achieve this. so it can sense what your hands are doing even when they are nearly outstreached. gaze and gestures as input command. Parts of HoloLens It have a major six parts those are bone of this product Camera.1. in one of them we study the major hardware parts of it. Working of HoloLens Microsoft hololens has user interface so it takes voice. Vent. Lenses. light . Let us study them one by one: Camera : The project HoloLens depth camera has a field of vision that spans 120 by 120 degree. have a high holographic density. They are transparent so that wearer can see the real world behind virtual object. To create project HoloLens image. i.5K radiants. it is a computer on its own. 18 sensors flood the brain of the device with terabyte of data every seconds. 4. HoloLens contain CPU. Buttons. GPU and first of its kind HPU (holographic processing unit). Sensor. Computer. The more radiant and light points there are. Now projection of hologram.e. HoloLens has been designed for optimal holographic density of 2. for projection hololens use the HUE (head up display) method two nanoprojector located at each side of head and semi transparent visor which reflect the image as light on users eye. the brighter and richer the holograms become. Than internal computer works on input command. Computer : HoloLens is not just a visor connected to a computer.” We here divide it in three parts to make easy to understand. 4. Lenses : Microsoft HoloLens has two display. Microsoft explains the holographic element in this way: “The key to a great holographic experience holograms that are light point rich. and specification than we will move to the real world example of augmented reality based HoloLens. Holographic Resolution : 2. 4. where it vents up and out.5 radiants (lights point per radian). the hands are an input system: user can interact with whatever he sees by just touching it. Motion sensor detect wearers movement.warm air flows to the sides. Buttons : On the right side buttons allow user to adjust the volume and to control the contrast of the hologram. Automatic pupillary distance calibration. The sensor can also see wearers hands. Vent : The device is more powerful than a laptop but won’t overheat. Holographic Density: > 2. Wearer also give gesture as input sensor enables the tracking of user movement. .1. Sensor : Sensor track where the wearer is looking and adjust the display. where they ricochet between layers of glasses before finally hitting of wearer eye. 4. Then the photons enter the two lenses(one for each eye). particles bounce around millions of times in the so called light engine of the device.2. Optical view of HoloLens See through holographic lenses (Waveguides) 2 HD 16:9 light engines. Specification of HoloLens Optics Fig.3 total light points.2. Sensors of HoloLens 1 IMU 4 environment understanding cameras 1 depth camera 1 2MP photo / HD video camera Mixed reality capture 4 microphones 1 ambient light sensor .2. Sensors Fig.2. 4. 5mm jack Volume up/down Brightness up/down Power button Battery status LEDs Wi-Fi 802. Human Understanding Spatial sound Gaze tracking Gesture input Voice support Input / Output / Connectivity Built-in speakers Audio 3.1 LE Power Battery Life 2-3 hours of active use Up to 2 weeks of standby time Fully functional when charging Passively cooled (no fans) .0 Bluetooth 4.11ac Micro USB 2. 0 support Custom-built Microsoft Holographic Processing Unit (HPU 1.0) Weight 579g Memory 64GB Flash 2GB RAM . Motherboard of HoloLens Intel 32 bit architecture with TPM 2. Processors Fig.3. 4.2. To achieve this. and Playstation VR. Microsoft presented some of the most interesting potential uses in a video. These VR headsets immerse you in a fully simulated world. Among the most interesting. . In much the same way as Google's ill-fated Glass experiment. but it's not quite that advanced yet. Oculus Rift. HoloLens will be able to let you view and interact with work projects such as assembling 3D models. quite a lot. HoloLens has been designed for optimal holographic density of 2. What will you be able to do with HoloLens? From the sounds of it. interact with the environment you're in. Microsoft explains the holographic element in this way: "The key to a great holographic experience is holograms that are light point rich. whereas the HoloLens uses the real world as a canvas on which to overlay virtual elements.e. That means it's different to virtual reality headsets such as the HTC Vive.3. which you can see above. The in-built speakers that sit above your ears create sound based upon where each hologram is in relation to your position. video chat with hologram versions of Skype contacts. Microsoft's AR headset will create virtual 3D models that. thanks to the HoloLens' various cameras and sensors. The more radiants and light points there are. Real-life working of HoloLens The HoloLens comes with semitransparent holographic lenses which 'generate multi- dimensional full-colour holograms'. and are pinned or anchored to the world around you. That means it's not going to be projecting images into a room that everyone can see. and even watch live content." Unlike Google Glass then.5K radiants. i. play games like Minecraft. have a high holographic density.4. the HoloLens will interject virtual elements onto your vision. making for an even more immersive experience. It's cutting edge stuff. the brighter and richer the holograms become. An on-stage demonstration further emphasised the ability to create 3D objects. although it remains unclear how. Microsoft is also partnering with other companies to use HoloLens in practical ways. At Microsoft's 2015 Build developer conference. The car maker is also expected to integrate HoloLens tech into its autonomous vehicle projects.1. we got to see other ways HoloLens could be used. One of the most fascinating uses. at least for the folks at NASA. Volvo is expected to bring the technology to its car showrooms where customers will be able to view different colour options for their chosen car and see safety features in action. is the potential to control the Mars rover Curiosity via the HoloLens. a Raspberry Pi powered robot with HoloLens support. from assembling to choosing the colours. Fig. The company treating us to demos of physiology students exploring the human anatomy. 4. Playing minecraft game. and how .3. all using simple gestures that looks very Intel RealSense. which collaborated with Microsoft in the making of HoloLens. The headset will give NASA staff the ability to plant virtual flags in the terrain and work as if they're actually on the planet themselves. in the form of some kind of space blaster. Having snapped up Minecraft-maker Mojang for a cool $2.architects can use the augmented reality elements to help construct buildings with Windows 10 at the core. At a Windows 10 event late last year. Microsoft showed off a brand new demo known as Project X-Ray. meaning the gameplay is tailored to you. . But what about gaming with HoloLens? Well Microsoft is doing that as well and the first example of what it's calling mixed reality gaming was demonstrated at Microsoft's E3 2015 press conference. The robots themselves know where the walls and furniture are in your space. 'create world'. There's options to change your weapons using voice commands and there's a tonne of different enemies that you'll come up against. you can play with items and characters. An unknown wearer took to the stage wearing the HoloLens and quickly donned a wearable hologram. which showcases mixed reality technology. but then suddenly a crack started to appear and a mechanic alien burst through it. Then with your hands.5 billion. This can be done all while another player is immersed in the Minecraft world from a Microsoft Surface tablet. the first Minecraft game designed for Hololens lets you project maps onto a physical table simply by saying the words. He shot through one of the walls on the stage a few times. and HoloTour. In late March 2016. Young Conker.2. Fig. an impressive video showcasing 'holoportation' appeared online. On the app side. there's HoloStudio. The Microsoft research video (below) demonstrated how it's possible to use the HoloLens to teleport a 3D version of yourself into another HoloLens wearer's field of view. so you're still a long way from chatting to virtual versions of your mates in your living room. the whole thing requires multiple cameras in order to work. Along with the launch of the HoloLens developer edition came news of the first confirmed games and apps for the headset.3. while games include Fragments. Skype. 4. and RoboRaid. HoloLens Project X-Ray. There's clearly some exciting possibilities here and we can't wait to see what else Microsoft has planned on the gaming front. Microsoft confirmed that the dev kit would come with seven pre-installed AR experiences. But the video was another example of how innovative Microsoft's headset has the potential to be. Of course. . 3 Holographic platform . Microsoft showed off a seriously cool new app called Actiongram.In March 2016.3. 4. The storytelling app will allow developers to create videos featuring holographic effects for use with the headset. which it plans to launch in the summer. Fig. Advantages of HoloLens Easy to wear and use. 6. Sensitive and responsive to the presence of people. A spectacle based computer to reside directly On your eyes rather than your pocket. Dis-advantages of HoloLens Can be easily damaged or broken user will have a tough time taking care of it. Hololens can be used in army battlefield. . where detailed instruction can be given to the untrained person in the midest of combat. 5. Privacy of people may break due to new glasses. It may lead to accident while driving. virtual reality replaces the real world with a simulated one. It immerses the user by making them feel like they . It is related to a more general concept called mediated reality. the technology functions by enhancing one’s current perception of reality. e. video. real-world environment whose elements are augmented (or supplemented) by computer- generated sensory input such as sound.1. So what is the difference between virtual reality vs. One example is an AR Helmet for construction workers which displays information about the construction sites. adding computer vision and object recognition) the information about the surrounding real world of the user becomes interactive and digitally manipulable. such as sports scores on TV during a match. Augmentation is conventionally in real-time and in semantic context with environmental elements. This information can be virtual or real. By contrast. computer-generated simulation or recreation of a real life environment or situation. Both are earning a lot of media attention and are promising tremendous growth. As a result.g. 7. One of the biggest confusions in the world of augmented reality is the difference between augmented reality and virtual reality. 7. augmented reality? What is Virtual Reality? Virtual reality (VR) is an artificial. graphics or GPS data. Different from Virtual Reality. Augmented reality brings out the components of the digital world into a person's perceived real world. Information about the environment and its objects is overlaid on the real world. seeing other real sensed or measured information such as electromagnetic radio waves overlaid in exact alignment with where they actually are in space. Augmented Reality Augmented reality (AR) is a live direct or indirect view of a physical.g. in which a view of reality is modified (possibly even diminished rather than augmented) by a computer. With the help of advanced AR technology (e. head mounted display). or 3D movies. and specify what types of interactions are possible for them. A lady with Virtual Reality gadget (Facebook’s Oculus) VR is typically achieved by wearing a headset like Facebook’s Oculus equipped with the technology. are experiencing the simulated reality firsthand. To enhance training for real life environments by creating a simulation of reality where people can practice beforehand (Such as flight simulators for pilots). and is used prominently in two different ways: To create and enhance an imaginary reality for gaming. What is Augmented Reality? . and play (Such as video and computer games. entertainment. Virtual reality is possible through a coding language known as VRML (Virtual Reality Modeling Language) which can be used to create a series of images. Fig 7. primarily by stimulating their vision and hearing.1. Augmented Reality vs.Augmented reality (AR) is a technology that layers computer-generated enhancements atop an existing reality in order to make it more meaningful through the ability to interact with it. AR is developed into apps and used on mobile devices to blend digital components into the real world in such a way that they enhance one another. AR technology is quickly coming into the mainstream. Virtual Reality Augmented reality and virtual reality are inverse reflections of one in another with what each technology seeks to accomplish and deliver for the user. . while augmented reality delivers virtual elements as an overlay to the real world. photos or text messages on mobile devices. Virtual reality offers a digital recreation of a real life setting. Leaders of the tech industry are also using AR to do amazing and revolutionary things with holograms and motion activated commands. but can also be told apart easily. It is used to display score overlays on telecasted sports games and pop out 3D emails. Pin holograms to physical objects so user can size and scale them in each angle and with gestures do all new creation. the vary new way to create what we imagine. some of them can be categories in major three lines below: Visual diagrams would actually show up in space around the user indicating exactly what you need to do next. where detailed medical instructions could be given to untrained personnel in the midst of combat. Future Scope of HoloLens HoloLens is the product to enhance the virtual reality or augmented reality in real world. it is the new way to visualize our work. 8. . There are various uses and scopes for HoloLens. HoloLens is a new world to connect. This application could even extend to the battlefield. new way to collaborate and explore. create and explore like never before. 9. so see your world as a canvas. advanced optics. and spatial sound to allow to augmented reality applications. and so on… . and gives you more natural way to interact. talk to Dad on Skype. with a nature user interface that the user interact with trough gaze. play Minecraft. voice and hand gestures that gives you ways to go beyond the screen. Microsoft HoloLens is a smart-glasses headset that is cordless. spatial sound gives you the new augmented or virtual world over real world. HoloLens is a thing where you can connect. use AutoCAD. Conclusion The premier device for Windows Holographic. a high-definition stereoscopic 3D optical head-mounted display. It uses advance sensors. visualize your work. HoloLens with Holographic processing unit. power and grace. Create what you imagine. design a brand new car. build in speakers. create and explore like never before. collaborate and explore. Without bumping to walls you can watch NetFlix. self-contained Windows 10 computer. sensor fusion. (news. "Halo 5 headlines greatest holiday games lineup in Xbox history" . Satya Nadella (21 January 2015). Microsoft. Retrieved 15 June 2015. Windows 10: The Next Chapter. References 1. Microsoft. Event occurs at 01:36:53. Microsoft. Pandher. Terry Myerson.com) 9.com) 2.microsoft. "Microsoft Hololens hardware". Event occurs at 42:42. "Gestures". Specs Of The Augmented Reality Headset.com) . storage and RAM specs. Retrieved 1 May 2015. 1 December 2015. Retrieved 15 July 2015. Alex Kipman.com) 7. Lorraine Bardeen. Windows Central. Microsoft News Center. "Microsoft HoloLens Preorders: Price. 8 July 2015. Retrieved 9 July 2015. Windows Dev Center. (vimeo. 6. Retrieved 1 March 2016." The Bitbag. Windows Dev Center.com) 8. Retrieved (vimeo. 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