Tobii X2-30 Eye Tracker Compact Edition Product Description page 8

Table 2.2 Gaze Precision (Preliminary)
G G a a z z e e p p r r e e c c i i s s i i o o n n
Artificial Eye With Stampe filter 2
Without filter
Human Eye With Stampe filter 2
Without filter
1. Stampe (Behavior Research Methods, Instruments & Computers, 1993, 25 (2), pp.137-142) describes a noise reduction filter commonly used for eye tracking data. In these measurements, the
Stampe stage 2 algorithm has been applied.
Table 2.3 Eye Tracking Specifications (Preliminary)
S S a a m m p p l l i i n n g g r r a a t t e e 1
T T o o t t a a l l s s y y s s t t e e m m l l a a t t e e n n c c y y
T T i i m m e e t t o o t t r r a a c c k k i i n n g g r r e e c c o o v v e e r r y y
2
H H e e a a d d m m o o v v e e m m e e n n t t Freedom of head
movement at 70 cm
(width x height)
Operating distance
(eye tracker to subject)
R R e e c c o o m m m m e e n n d d e e d d s s c c r r e e e e n n s s i i z z e e
D D a a t t a a s s a a m m p p l l e e o o u u t t p p u u t t
1. As the Tobii X2-30 Eye Trackers have a variable and low sampling rate, they are not suitable for detailed studies of the onset or durations of fixations, saccades or other measures requiring high
temporal and stable sampling precision.
2. Freedom of head movement describes the volume in front of the tracker in which the user must have at least one of the eyes. The numbers are specified parallel/orthogonal to screen surface, as-
suming eye tracker is at 20 degree angle to screen.
Table 2.4 Eye Tracking Units (Preliminary)
E E y y e e t t r r a a c c k k e e r r p p r r o o c c e e s s s s i i n n g g u u n n i i t t
C C o o n n n n e e c c t t o o r r s s
W W e e i i g g h h t t
S S i i z z e e
M M o o u u n n t t i i n n g g s s o o l l u u t t i i o o n n s s
4
2 Technical Specifications
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r C C o o m m - -
p p a a c c t t E E d d i i t t i i o o n n
B B i i n n o o c c u u l l a a r r
1 Pending
Pending
Pending
0.32
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r C C o o m m - -
p p a a c c t t E E d d i i t t i i o o n n
30 Hz
(std. deviation ~ 3Hz)
48–67 ms
For blinks: immediate
50 x 36 cm (20 x 14ʺ)
40–90 cm (15.7–33.5ʺ)
up to 22ʺ
Timestamp, eye position, gaze point,
pupil diameter, validity code
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r C C o o m m p p a a c c t t
E E d d i i t t i i o o n n
Embedded, no external eye tracking host
necessary
USB 2.0
200 g (7.1 oz)
184*28*23 mm (7.2 * 1.1* 0.9'')
Adhesive Mounting brackets for monitors,
laptops and tablets. Desk Stand Acces-
sory package for Tripod and desks
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r W W i i d d e e
M M o o n n o o c c u u l l a a r r B B i i n n o o c c u u l l a a r r
Pending Pending
Pending Pending
Pending Pending
0.43 0.32
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r W W i i d d e e
(std. deviation ~ 3Hz)
48-67 ms
For blinks: immediate
50 x 36 cm (20 x 14ʺ)
50–100 cm (20–39ʺ)
up to 27ʺ
Timestamp, eye position, gaze point,
pupil diameter, validity code
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r W W i i d d e e E E d d i i t t i i o o n n
Embedded, no external eye tracking host
necessary
USB 2.0
250 g (8.8 oz)
400*28*23 mm (15.7 * 1.1* 0.9'')
Adhesive Mounting brackets for moni-
tors, laptops and tablets. Desk Stand Ac-
cessory package for Tripod and desks
Product Description v.1.0 - en-US
E E d d i i t t i i o o n n
M M o o n n o o c c u u l l a a r r
Pending
Pending
Pending
0.43
E E d d i i t t i i o o n n
30 Hz