Microsoft HoloLens

Last updated

Microsoft HoloLens
Microsoft HoloLens logo 2015.png
Also known asProject Baraboo (during the development period)
Developer Microsoft
ManufacturerMicrosoft
Product family Windows 10
Type Mixed reality augmented reality head-mounted display smartglasses
Generation2
Release date
  • March 30, 2016 (2016-03-30) (Development Edition)

(Development Edition 2) announced May 2, 2019

  • N/A (Consumer version)
Introductory price $3,000 [1]
$5,000 (Commercial Suite) [2]
Operating system Windows Mixed Reality
CPU Intel Atom x5-Z8100 (1GHz)
Memory
Storage64 GB (flash memory)
Display2.3 megapixel widescreen head-mounted display
SoundSpatial sound technology
Input
Controller inputGestural commands via sensors and HPU
Camera2.4 MP
TouchpadSide Panel
Connectivity
Platform Windows 10
Mass579 g (1.28 lb)
Successor HoloLens 2
Website Official website

Microsoft HoloLens is an augmented reality (AR)/mixed reality (MR) headset developed and manufactured by Microsoft. HoloLens runs the Windows Mixed Reality platform under the Windows 10 operating system. Some of the positional tracking technology used in HoloLens can trace its lineage to the Microsoft Kinect, an accessory for Microsoft's Xbox 360 and Xbox One game consoles that was introduced in 2010. [3]

Contents

The pre-production version of HoloLens, the Development Edition, shipped on March 30, 2016, and is targeted to developers in the United States and Canada for a list price of $3000 [4] [5] which allowed hobbyist, professionals, and corporations to participate in the pre-production version of HoloLens. [6] Samsung and Asus have extended an offer to Microsoft to help produce their own mixed-reality products, in collaboration with Microsoft, based around the concept and hardware on HoloLens. [7] [8] On October 12, 2016, Microsoft announced global expansion of HoloLens and publicized that HoloLens would be available for preorder in Australia, Ireland, France, Germany, New Zealand and the United Kingdom. [9] There is also a commercial suite (similar to a pro edition of Windows), with enterprise features such as BitLocker security. As of May 2017, the suite sold for US$5,000. [2] Microsoft has decided to rent the Hololens without clients making the full investment. Microsoft partners with a company called Absorbents to give the service of HoloLens rental. [10]

HoloLens 2 was announced at the Mobile World Congress (MWC) in Barcelona, Spain, on February 24, 2019, [11] and was available on preorder at $3,500. [12] [13]

Description

The HoloLens is a head-mounted display unit connected to an adjustable, cushioned inner headband, which can tilt HoloLens up and down, as well as forward and backward. [14] To wear the unit, the user fits the HoloLens on their head, using an adjustment wheel at the back of the headband to secure it around the crown, supporting and distributing the weight of the unit equally for comfort, [15] before tilting the visor towards the front of the eyes. [14]

The front of the unit houses many of the sensors and related hardware, including the processors, cameras and projection lenses. The visor is tinted; [15] enclosed in the visor piece is a pair of transparent combiner lenses, in which the projected images are displayed in the lower half. [16] The HoloLens must be calibrated to the interpupillary distance (IPD), or accustomed vision of the user. [17] [18]

Along the bottom edges of the side, located near the user's ears, are a pair of small, red 3D audio speakers. The speakers, competing against typical sound systems, do not obstruct external sounds, allowing the user to hear virtual sounds, along with the environment. [15] Using head-related transfer functions, the HoloLens generates binaural audio, which can simulate spatial effects; meaning the user, virtually, can perceive and locate a sound, as though it is coming from a virtual pinpoint or location. [19] [20] [note 1]

On the top edge are two pairs of buttons: display brightness buttons above the left ear, and volume buttons above the right ear. [21] Adjacent buttons are shaped differently—one concave, one convex—so that the user can distinguish them by touch. [14]

At the end of the left arm is a power button and row of five, small individual LED nodes, used to indicate system status, as well as for power management, indicating battery level and setting power/standby mode. [14] A USB 2.0 micro-B receptacle is located along the bottom edge. [15] A 3.5 mm audio jack is located along the bottom edge of the right arm. [5] [15]

Hardware

Man wearing Microsoft HoloLens MicrosoftHoloLensBloomGesture.JPG
Man wearing Microsoft HoloLens

The HoloLens is a first generation AR device. The displays on the HoloLens are simple waveguide displays with a fixed focus of approximately two meters. Because of the fixed focus, the displays exhibit the Vergence-Accommodation Conflict. [22]

The HoloLens features an inertial measurement unit (IMU) (which includes an accelerometer, gyroscope, and a magnetometer) [20] four "environment understanding" sensors (two on each side), an energy-efficient depth camera with a 120°×120° angle of view, [23] a 2.4-megapixel photographic video camera, a four-microphone array, and an ambient light sensor. [5] [24]

In addition to an Intel Cherry Trail SoC containing the CPU and GPU, [25] HoloLens features a custom-made Microsoft Holographic Processing Unit (HPU), [5] a coprocessor manufactured specifically for the HoloLens by Microsoft. The SoC and the HPU each have 1GB LPDDR3 and share 8MB SRAM, with the SoC also controlling 64GB eMMC and running the Windows 10 operating system. The HPU uses 28 custom DSPs from Tensilica [26] to process and integrate data from the sensors, as well as handling tasks such as spatial mapping, gesture recognition, and voice and speech recognition. [16] [20] According to Alex Kipman, the HPU processes "terabytes of information". One attendee estimated that the display field of view of the demonstration units was 30°×17.5°. [27] In an interview at the 2015 Electronic Entertainment Expo in June, Microsoft Vice-President of Next-Gen Experiences, Kudo Tsunoda, indicated that the field of view is unlikely to be significantly different on release of the current version. [28]

The HoloLens contains an internal rechargeable battery, with average life rated at 2–3 hours of active use, or 2 weeks of standby time. The HoloLens can be operated while charging. [5]

HoloLens features IEEE 802.11ac Wi-Fi and Bluetooth 4.1 Low Energy (LE) wireless connectivity. The headset uses Bluetooth LE to pair with the included Clicker, a thumb-sized finger-operating input device that can be used for interface scrolling and selecting. The Clicker features a clickable surface for selecting, and an orientation sensor which provides for scrolling functions via tilting and panning of the unit. The Clicker features an elastic finger loop for holding the device, and a USB 2.0 micro-B receptacle for charging its internal battery. [29]

The HoloLens core display has been integrated into hard hat hardware systems. [30]

Applications

Since 2016, a number of augmented-reality applications have been showcased for the HoloLens. Some of the applications that were available at launch included:

Other applications announced or showcased for HoloLens include:

Interface

The HoloLens uses voice commands, gaze, hand gestures, and a controller as the primary input methods. [69] Gaze commands, such as head-tracking, allows the user to bring application focus to whatever the user is perceiving. [70] "Elements"—or any virtual application or button—are selected using an air tap method, similar to clicking an imaginary computer mouse. The tap can be held for a drag simulation to move an element, as well as voice commands for certain commands and actions.

The HoloLens shell carries over and adapts many elements from the Windows desktop environment. A "bloom" gesture for accessing the shell (performing a similar function to pressing a Windows key on a Windows keyboard or tablet, or the Xbox button on an Xbox One Controller) is performed by opening one's hand, fingers spread with the palm facing up. [71] [72] Windows can be dragged to a particular position, as well as resized. Virtual elements such as windows or menus can be "pinned" to locations, physical structures or objects within the environment; or can be "carried", or fixed in relation to the user, following the user as they move around. [73] Title bars for application windows have a title on the left, and buttons for window management functions on the right.

In April 2016 Microsoft created the Microsoft HoloLens App for Windows 10 PCs and Windows 10 Mobile devices. The app allows developers to run apps on the HoloLens, use cell phone or computer keyboards for text input, view streamed video from the HoloLens on an external device, and remotely capture mixed reality photos and videos.

Developing applications for HoloLens

Microsoft Visual Studio is an IDE that can be used to develop applications (both 2D and 3D) for HoloLens. Applications can be tested using HoloLens emulator (included into Visual Studio 2015 IDE) or HoloLens Development Edition.

2D applications

HoloLens can run almost all Universal Windows Platform apps. [74] These apps appear as 2D projections. Not all Windows 10 APIs are currently supported by HoloLens, [75] but in most cases the same app is able to run across all Windows 10 devices (including HoloLens), and the same tools that are used to develop applications for Windows PC or Windows Phone can be used to develop a HoloLens app.

3D applications

3D applications, or "holographic" applications, use Windows Holographic APIs. Microsoft recommends Unity engine and Vuforia to create 3D apps for HoloLens, but it's also possible for a developer to build their own engine using DirectX and Windows APIs. [76]

Criticism

In November 2018 Microsoft got a contract for the supply of 100,000 HoloLens MR glasses, worth $479 million, to the U.S. military. [77] The MR goggles are intended to provide "increased lethality, mobility, and situational awareness necessary to achieve overmatch against [...] current and future adversaries." Just before the opening of one of the largest international technology conferences—the GSMA Mobile World Congress 2019 in Barcelona—fifty Microsoft employees wrote a letter to their CEO Satya Nadella and President Brad Smith stating that they "refuse to develop technologies for warfare and oppression". They demanded that corporate management terminate the contract. [78]

See also

Notes

Related Research Articles

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  75. ↑ "Current limitations for apps using APIs from the shell". Archived from the original on December 20, 2016. Retrieved December 11, 2016.
  76. ↑ "Development overview".
  77. ↑ "Joshua Brustein: Microsoft Win's $480 Million Army Battlefield Contract". Bloomberg.com. Retrieved February 23, 2019.
  78. ↑ Glaser, April (February 22, 2019). "Microsoft Workers Say the Company Is War Profiteering, and They've Timed Their Protest to Hurt". Slate Magazine. Retrieved November 15, 2020.
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