Tobii Pro Spectrum User manual

Tobii Pro Spectrum
User Manual

Tobii Pro Spectrum User Manual
v 2.4
May 2022
All rights reserved.
Copyright © Tobii AB (publ)
The information contained in this document is proprietary to
Tobii AB. Any reproduction in part or whole without prior written
authorization by Tobii AB is prohibited.
Products that are referred to in this document may be either trade-
marks and/or registered trademarks of the respective owners. The
publisher and the author make no claim to these trademarks.
While every precaution has been taken in the preparation of this
document, the publisher and the author assume no responsibility for
errors or omissions, or for damages resulting from the use of
information contained in this document or from the use of programs
and source code that may accompany it. In no event shall the
publisher and the author be liable for any loss of profit or any other
commercial damage caused or alleged to have been caused directly
or indirectly by this document.
Content subject to change without notice.
Please visit Tobii Connect for updated versions of this document.

Tobii Pro Spectrum User Manual v 2.4 3
Table of Contents
1 Introduction 5
1.1 Overview 5
1.2 Basic operating principles 5
1.3 Product versions 5
1.4 Additional software options 6
2 What's in the Tobii Pro Spectrum box 7
3 Safety 9
3.1 Mounting warning 9
3.2 Emergency warning 9
3.3 Infrared warning 9
3.4 Epilepsy warning 9
3.5 Child safety 10
3.6 Do not open Tobii Pro Spectrum 10
3.7 Environment 10
4 Set up Tobii Pro Spectrum 11
4.1 Ventilation 11
4.2 Test environment 11
4.3 Mount the monitor to the eye tracker 11
4.4 Connect the eye tracker 12
4.4.1 Power on Tobii Pro Spectrum 13
4.5 Monitor settings 13
5 Display settings 15
5.1 VESA mount 15
5.2 Scene camera mount 16
6 Tobii Pro Spectrum configuration 17
6.1 Tobii Pro Eye Tracker Manager 17
6.2 Keep your eye tracker software and display setup updated 17
6.3 Upgrade and downgrade the eye tracker’s firmware 18
6.4 Configure your eye tracker in Tobii Pro Eye Tracker Manager 18
6.4.1 Change Tobii Pro Spectrum frequency setting 18
6.4.2 Configure Tobii Pro Spectrum for standalone use 19
7 Additional features 20
7.1 User calibration for Tobii Pro Spectrum 20
7.1.1 Binocular calibration 20
7.1.2 Monocular calibration 20
7.2 Use the TTL input port for external event recording 21
7.3 Eye images 22
7.4 Eye openness 22
8 Product care and liability 23
8.1 Transportation and storage 23
8.2 Cleaning 23
8.3 Disinfection 23
8.4 Disposal of the eye tracker 23
8.5 Limitation of liability 23

Tobii Pro Spectrum User Manual v 2.4 4
9 Technical specifications 24
9.1 Eye tracking specifications 24
9.2 Setup 25
9.3 Software compatibility 26
9.4 Hardware versions 26
9.5 Pro Spectrum eye tracker specifications 26
10 Compliance 29
Appendix A Nonhuman primate modes 31
A1 Monkey 31
A2 Great ape 31
Appendix B Recommended monitor 32
Appendix C Customer Care, training, and warranty 33
C1 Customer Care 33
C1.1 Get help 33
C2 Training and education services 33
C3 Warranty information 33
Appendix D Limitations and considerations 34
D1 Intended use 34
D2 Light conditions 34
D3 Eyelashes 34
D4 Droopy eyelids 34
Appendix E Glossary 35

Tobii Pro Spectrum User Manual v 2.4 5
1 Introduction
1.1 Overview
Tobii Pro Spectrum can be used in various setups, either with an attached monitor or as a stan-
dalone unit, to perform eye tracking with physical objects. It supports research investigating blinks
and eye closure dynamics, based on raw pupil and eye openness signal data (for example, con-
striction/dilation velocity, lid closure rate and acceleration).
The eye tracker's design enables the subject to move naturally during recording while still achiev-
ing high accuracy and precision. In 2022, Tobii introduced Eye Tracking modes so that research-
ers can choose between human and nonhuman primate modes. Read more about Nonhuman
primate modes.
Figure 1. The typical setup is having Tobii Pro Spectrum connected to a PC running Pro Lab.
1.2 Basic operating principles
Tobii Pro Spectrum use infrared illuminators to generate reflection patterns on the corneas of
the subject’s eyes. These patterns, plus other visual data about the subject, are collected by
image sensors. Sophisticated image-processing algorithms identify relevant features, including
the eyes and the corneal reflection patterns. Complex mathematics is used to calculate the 3D
position of each eyeball and the gaze point on the screen (or when a screen isn’t used, for the
gaze point on the object); in plain words, it tells you where the subject is looking.
Eye trackers from Tobii Pro are designed for use in indoor office environments and for
tracking on humans.
1.3 Product versions
Tobii Pro Spectrum is available in three product versions: 1200 Hz, 600 Hz, and 300 Hz. The
values denote the eye tracker’s maximum sampling frequency, but it can be used at lower set-
tings as well. The 600 Hz and 300 Hz versions can be upgraded to a faster version. For more
information, contact your sales representative or visit Tobii online.

Tobii Pro Spectrum User Manual v 2.4 6
1.4 Additional software options
Pro Lab
tobiipro.com/product-listing/tobii-pro-
lab/
Pro Lab is a comprehensive research software plat-
form for eye tracking designed to meet the highest
demands on different research scenarios with exact
timing accuracy. This software offers an efficient work-
flow, making it easy to design experiments, record
data, analyze and visualize eye tracking data, and to
sync this data with other biometric data streams.
Pro SDK
tobiipro.com/product-listing/tobii-pro-
sdk/
Pro SDK offers a broad set of tools that makes it
simple to develop a variety of niche applications or
scripts across multiple platforms, using a wide range
of programming languages. This SDK gives the
researcher access to the full set of relevant gaze data
streams, such as 3D eye coordinates, raw data, pupil
data, etc.
Third-party software This term refers to any application built on Pro SDK.

Tobii Pro Spectrum User Manual v 2.4 7
2 What's in the Tobii Pro Spectrum box
Figure 2. The contents of the Tobiii Pro Spectrum box
A. Angle meter I. USB cable for connection between the PC
and the monitor’s integrated USB hub
B. Measuring tape J. Cold shoe for mounting of a user camera
C. Power cables for monitor (UK, US, EU and
Aus/China)
K. DisplayPort cable
D. Monitor L. HDMI cable
E. Eye tracker M. Cleaning cloth
F. Monitor mounting bracket N. Fabric cord sleeve for collecting the cables
G. Power cables for eye tracker (UK, US,
EU and Aus/ China)
O. Ethernet cable

Tobii Pro Spectrum User Manual v 2.4 8
H. Power adaptor for eye tracker

Tobii Pro Spectrum User Manual v 2.4 9
3 Safety
3.1 Mounting warning
Tobii Pro Spectrum should be mounted according to the instructions of the approved
mounts used. Tobii Pro AB or its agents are not liable for damage or injuries to a per-
son or its property due to Pro Spectrum falling from a mounted configuration. The
mounting of Pro Spectrum is done entirely at the user’s own risk.
3.2 Emergency warning
Tobii Pro Spectrum is to be used for research purposes only. Be aware that due to the
low, but possible risk of failure or distraction, Pro Spectrum should not be relied upon
or used in dangerous or otherwise critical situations.
3.3 Infrared warning
When activated, Tobii Pro Spectrum emits pulsed infrared (IR) light. Certain medical
devices are susceptible to disturbance by IR light and/or radiation. Do not use Pro
Spectrum when in the vicinity of such susceptible medical devices as their accuracy or
proper functionality could be inhibited.
3.4 Epilepsy warning
Some people with photosensitive epilepsy are susceptible to epileptic seizures or loss
of consciousness when exposed to certain flashing lights or light patterns in everyday
life. This may happen even if the person has no medical history of epilepsy or has
never had any epileptic seizures.
A person with photosensitive epilepsy would also be likely to have problems with TV
screens, some arcade games, and flickering fluorescent bulbs. Such people may have
a seizure while watching certain images or patterns on a monitor, or even when
exposed to the light sources of an eye tracker. It is estimated that about 3-5% of
people with epilepsy have this type of photosensitive epilepsy. Many people with pho-
tosensitive epilepsy experience an “aura” or feel odd sensations before the seizure
occurs. If you feel odd during use, move your eyes away from the eye tracker.

Tobii Pro Spectrum User Manual v 2.4 10
3.5 Child safety
Tobii Pro Spectrum is an advanced computer system and electronic device. As such it
is composed of numerous separate, assembled parts. In the hands of a child certain of
these parts have the possibility of being separated from the device, possibly con-
stituting a choking hazard or another danger to the child.
Young children should not have access to, or use, the device without parental or guard-
ian supervision.
3.6 Do not open Tobii Pro Spectrum
Non-compliance will result in loss of Warranty! There are no user serviceable com-
ponents inside. Contact Tobii Customer Care if your Tobii Pro Spectrum is not working
properly.
3.7 Environment
Tobii Pro Spectrum is designed for use in dry indoor environments. Avoid any expos-
ure to direct sunlight as this will affect eye tracking quality and longer exposure can
overheat the equipment. Avoid exposure to any liquids, gels, moist, rain, sweat or
other damp materials or environments. Do not use the eye tracker near water – the
device is not water resistant.
Keep the eye tracker in a clean and dust free environment. When using the equipment
take adequate precautions against dust and dirt.
Do not place or use the equipment in places subject to extreme temperatures and
humidity, such as on top of and or near a heating element, in a hot or damp room, or in
a hot automobile in the sun.