Specs 🔢

This page is dedicated to presenting the specs of VIBES lab current equipment

HTC VIVE Pro Eye 🕹️

Headset 👤

Screen	Dual OLED 3.5″ diagonal
Resolution	1440 x 1600 pixels per eye (2880 x 1600 pixels combined)
Refresh rate	90 Hz
Field of view	110 degrees
Audio	Hi-Res-certified headset Hi-Res-certificate headphone (removable) High-impedance headphone support Enhanced headphone ergonomics
Input	Dual Integrated microphones
Connections	USB-C 3.0, DP 1.2, Bluetooth
Sensors	SteamVR Tracking, G-sensor, gyroscope, proximity, IPD sensor, eye tracking
Ergonomics	Eye relief with lens distance adjustment Adjustable IPD Adjustable headphones Adjustable headstrap

Eye Tracker 👁️

Gaze data output frequency (binocular)	120hz
Accuracy*	0.5°–1.1°
Calibration	5-point
Trackable field of view**	110°
Data output (eye information)	Timestamp (device and system) Gaze origin Gaze direction Pupil position Pupil size Eye openness
Interfaces	HTC SRanipal SDK
SDK engine compatibility	Unity, Unreal

Controller Specs 🎮

Sensors	SteamVR Tracking 2.0
Input	Multifunction trackpad, Grip buttons, Dual-stage trigger, System button, Menu button
Connections	Micro-USB charging port

Tobii Spectrum

Eye tracking technique	Video-based pupil and corneal reflection eye tracking with dark and bright pupil illumination modes. Two cameras capture stereo images of both eyes for robust accurate measurement of eye gaze and eye position in 3D space, as well as pupil diameter.
Eye tracking mode	Tobii Pro Spectrum has four different eye tracking modes for different groups of primate species: Human Great ape Monkey Small monkey
Sampling frequency	60 Hz, 120 Hz, 150 Hz, 300 Hz, 600 Hz, or 1200 Hz (max. frequency depends on hardware version)
Precision	Head supported 0.01° RMS at optimal conditions (applying Savitzky-Golay filtering, settings listed in the test report) 0.06° RMS at optimal conditions (raw signal) Head free-to-move 0.02° RMS at optimal conditions (applying Savitzky-Golay filtering, settings listed in the test report) 0.08° RMS at optimal conditions (raw signal)
Accuracy	Head supported² Down to 0.16° Median: 0.30° (P25: 0.24° - P75: 0.41°) Head free-to-move³ Down to 0.17° Median: 0.43° (P25: 0.32° - P75: 0.59°)
Binocular eye tracking	Yes
Eye tracker latency	Mean latency < 2 ms @ 1200Hz (SD < 0.2 ms)⁴
Blink recovery time	1 frame (immediate)
Gaze recovery time	Less than 150 ms
Data sample output	Timestamp Gaze origin Gaze point Pupil diameter
Eye openness data stream	Eye openness stream has the same frequency as frequency selected for the gaze stream and will have the same timestamps. Eye openness data is provided in millimeters, for each eye individually.
Eye image data stream	Eye image stream frequency is approximately 10 Hz (one image with both eyes). Zoomed-in eye images available in tracking mode. Full-frame camera images are available in gaze recovery mode.
TTL input stream	8–bit timestamped data (256 event codes) Event driven detection with a timestamp accuracy of 50 µs
Tracker and client time synchronization	Integrated between the eye tracker time domain and the client computer time domain with an accuracy of 100 µs
User calibration	Binocular, Monocular

Tobii Nano

Eye tracking technique	Corneal reflection, dark and bright pupil combination, one camera system.
Sampling frequency	60 Hz
Accuracy	0.3° at optimal conditions
Precision	0.10° RMS at optimal conditions
Binocular eye tracking	Yes
Freedom of head movement	Width x height: 35 cm x 30 cm (13.78” x 11.81”) at 65 cm (at least one eye tracked)
Operating distance	45 to 85 cm (18 to 33”)
Maximum screen size	19” (16:9 aspect ratio)
Total system latency	17 ms
Blink recovery time	1 frame (immediate)
Gaze recovery time	250 ms
Data output (for each eye)	Timestamp Gaze origin Gaze point Pupil diameter Validity code