The document discusses Microsoft Hololens, an augmented reality headset developed by Microsoft. It was created by Alex Kipman and allows users to see 3D holograms overlaid on the real world. The Hololens uses multiple sensors and cameras to map the environment and track hand movements to interact with holograms. While it provides an immersive mixed reality experience, the Hololens also has limitations like a small field of view and limited gesture controls. The document examines the design, technical specifications, applications, advantages and limitations of the Hololens.

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Uttra et al., JICSCT www.gadlonline.com
GADL Journal of Inventions in Computer Science and Communication Technology (JICSCT)
1. ISSN(O): 2455-5738
Volume 3 – Issue 3, May-June, 2017
A Case Study for Microsoft Hololens
Uttra Tripathi
Student
Computer Science and
Engineering,JVWU Jaipur
uttra0125@gmail.com
Utkarsh Tripathi
Student
Civil Engineering, Galgotia
University, Greater Noida
aktripathimahoba@gmail.com
Sarvesh Singh
Assistant Professor
Computer Science and
Engineering,JVWU Jaipur
sarvi899@gmail.com
ABSTRACT
Microsoft Hololens is the design and concept of
future technology. It is augmented reality, which
means digital data is merged with real world objects.
Microsoft’s employee Alex Kipman created this, he
is working on this pair of glasses from 5 years. It is
the only device that can 3D scan the real world
objects. Its audio is also 3D quality. It is under
development now. Its starting price is 5000$ and it is
only for developers now. This is the best technology
of this time. And also it doesn’t work on pixels it
generates photons.
1.INTRODUCTION
It is known as the pair of mixed reality smart glasses
which is developed and manufactured by
Microsoft.Hololens gained popularity for being one
of the first computers running the Windows Mixed
Reality platform under the Windows 10 operating
system. It can trace its lineage to kinect, an add on for
Microsoft’s Xbox gaming console that was
introduced in 2010. It draws inspiration for our own.
We just have to imagine what we can do. Its mixed
reality brings people, places, and objects from our
physical and digital worlds together. This blended
environment becomes our canvas, where we can
create and enjoy a wide range of experiences.
2.DESIGN
It has multiple cameras stationed inside the headset
apparently, Hololens also handles sound incredibly
well. This is done through unity engine where
developers can pin audio to specific objects then as
people wearing the Hololens walk through a specific
area the sound changes based on the proximity to the
objects, just like it would in real world. The audio is
actually delivered through two small speakers in the
headset not by headphone. This is so we can still hear
the real-World environment around us. This is full
windows 10 integration, so when wearing the headset
we can drag items from a pc desktop and pull them
off to the screen into the air and still control them
with our mouse and inputs are also very well done
voice commands are also so fast. The developers can
register commands. These include more than five
cameras, accelerometers and gyroscopes to sense
where are headers and house positioned at all times.
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. To wear the unit, the
user fits the HoloLenson 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

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comfort, before tilting the visor towards the front of
the eyes.
In the front is much of the sensors and related
hardware, including the cameras and processors. The
visor is tinted;enclosed in the visor piece is a pair of
transparent combiner lenses, in which the projected
images are displayed in the lower half. The Hololens
must be calibrated to the Inter papillary
Distance (IPD), or accustomed vision of the user.
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.Using head-related transfer functions,
the Hololensgenerates 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.
On the top edge are two pairs of buttons: display
brightness buttons above the left ear, and volume
buttons above the right ear.Adjacent buttons are
shaped differently—one concave, one convex—so
that the user can distinguish them by touch.
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. A USB 2.0 micro-B receptacle
is located along the bottom edge. A 3.5 mm audio
jack is located along the bottom edge of the right
arm.
3.WORKING MECHANISM
It is augmented reality, means real life objects are
merges with digital data. Microsoft has been working
on it from seven years. First idea of Hololens was
introduced by Alex Kipman (known as brainchild of
Microsoft). He has been working on this pair of
goggles for five years.
Instead of everyone walking into a room made to
reproduce 3D images, Microsoft's goggles show
images only the wearer can see. Everyone else will
just think we're wearing goofy-looking glasses.
The sensors flood the device with terabytes of data
every second so that’s a CPU, GPU and the first
HPU. To create project Hololens images light
particles bounce around millions of times in a light
engine within the device these photons enter the
goggles two lenses where they are ricochet between
layers of blue, green and red glass before they reach
the back of our eye and when we get the light at the
exact angle that is where the magic comes in. Unlike
most screen technologies before it is not pixels but
actual photons that are being generated making the
digital elements extremely lifelike.
Main point of Hololens is that all digitally created
objects can interact with real environment. And its
pixel density on display will be above 1000ppi(pixel
per inch).Another key thing about Hololens is what
Microsoft is trying to accomplish.
The company is not trying to transport us to a
different world, but rather bring the wonders of a
computer directly to the real life. Microsoft is
overlaying images and objects onto our livingrooms.
As a Hololens wearer, we'll still see the real world in
front of us.

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There's a whole bunch of other hardware that's
designed to help the HoloLens effects feel believable.
The device has a plethora of sensors to sense our
movements in a room and it uses this information
along with layers of colored glass to create images
we can interact with or investigate from different
angles. Just walk to the other side of it. The goggles
also have a camera that looks at the room, so the
HoloLens knows where tables, chairs and other
objects are. It then uses that information to project
3D images on top of and even inside them -- place
virtual dynamite on our desk and we might blow a
hole to see what's inside.
4.WHAT CAN HOLOLENS DO?
It can do things like floating videos, or a more
immersive skype session. Mainly it can scan the
environment in 3D, and makes 3D maps of
surroundings for example, Sofa, T.V., Bed etc. It
creates map of objects in semi-actual dimension,
which Dimension, which exists in real life make
makes It's map data merged in same 3D plane where
the real object is. So, if you move your head, digital
details added extra on real objects (like you made a
cat on sofa), will not move with head. In simple way
Cat will know it's position and it'll be still on sofa
even when you leave the room.
It records your hand movements and work according
to how you move your hand and fingers, even
eyeball.
The goggles will track our movements, watch our
gaze and transform what we see by blasting light at
our eyes (it doesn't hurt). Because the device tracks
where we are, we can use hand gestures -- right now
it's only a midair click by raising and lowering our
finger -- to interact with the 3D images. We can walk
around and talk to others without worrying about
bumping into walls. It can create on-the-fly semi
accurate wire mashes of objects that exists in real
life. It interacts with real environment like if we
throw a ball then it will bounce on the table as we
expect.
5.HOW IT LOOKS?
6. ADVANTAGES
 The holographic communication is 100%
the future, no matter it is for VR, AR or on
any capable device.
 The quality of this setup is really
good. Full body, no gaps, good color,
low latency.
7.LIMITATIONS
 We can only control HoloLens with our
gaze and by hovering our fingers on the air
to tap on a cursor it works fine is extremely
intuitive and everyone could get it the first
time but HoloLens needs more sophisticated
that mimic real life movements.
 The biggest limitation is the small viewing
area so all the holograms and the digital
environments are only visible through a

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small square area so if we get close to digital
objects we can’t actually see the entirety of
it, it cuts them off this.
8. CONCLUSION
We discussed about HoloLens introduction, design,
working, looks, applications, advantages and about
its limitations. HoloLens is the only mixed reality
project and it is being sold for only developers and its
starting price is 5000$. It is also called as the future
gadget. It is one of the best project of this time.
9.REFERENCE
[1]. Pandher, Gurmeet Singh (March 2, 2016).
"Microsoft HoloLens Preorders: Price, Specs Of The
Augmented Reality Headset". The Bitbag.
[2]. "Buy Microsoft HoloLens Commercial Suite -
Microsoft Store". Microsoft Store. Retrieved 2017-
05-05.
[3]. Mcbride, Sarah (May 23, 2016). "With
HoloLens, Microsoft aims to avoid Google's
mistakes". Reuters. Retrieved May 23, 2016.
[4]. Shaban, Hamza (September 2, 2014). "Microsoft
announces Windows Holographic with HoloLens
headset". The Verge. Retrieved January 21, 2015.
[5]. "Introducing the Microsoft HoloLens
Development Edition". Microsoft. Retrieved October
7, 2015. We will work to get devices out as quickly
as possible. As soon as additional devices are
available, more accepted applicants will be invited to
purchase.
[6]. Kim Yoo-chul (May 13, 2015). "Samsung seeks
partnership with Microsoft for hololens". The Korea
Times. Retrieved December 7, 2015.