Pro Spectrum User Manual v2.1
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1 Introduction
1.1
Overview
This user manual describes the features and functionalities of the Tobii Pro Spectrum eye
tracker. Pro Spectrum can be used in various setups, either with an attached monitor or as a
standalone unit, to perform eye tracking with physical objects. The typical setup is having Pro
Spectrum connected to a PC running Pro Lab, see the image below.
The design enables the subject to move naturally during recording while still achieving high accuracy
and precision.
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 four product versions: 1200 Hz, 600 Hz, 300 Hz and 150 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, 300 Hz and 150 Hz versions can be upgraded to a faster version. For
more information, contact your sales representative or visit
Summary of Contents for Pro Spectrum
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