Appendix B Technical Specifications
Sampling Rate 60 and 120 Hz
Headbox (Freedom of head movement) 50 x 40 cm at 65 cm distance
Operating Distance 50 - 80 cm
Accuracy 0.3 degrees (typ.)
Precision 0.1 degrees (typ.)
Output Data Gaze origin, gaze point, pupil diameter, eyelid
opening, head position and rotation, real-time
time stamp
All outputs as binocular data with associated
quality index
Time Stamp Precision 1 ms
Blink Recovery Time 1 frame (immediate)
Gaze Recovery Time 1 frame (immediate)
Latency 25 ms (60 Hz), 17 ms (120 Hz)
Eye Tracking Principle Dark pupil and corneal reflection
Maximum Screen Size 24” (16:9 aspect ratio)
Operating Environment Indoor (all illumination conditions)
Size 146 x 24 x 27 mm (width x height x depth)
Weight 162 g
Cable Length 2 m (*for 60 Hz up to 8 m with additional hard-
ware)
Camera Interface USB 3.0 (for 60 Hz), USB-C (for 120 Hz)
Mount Type On screen (with mounting plate)
Operating System Windows 10
Accessories External Processing Unit
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