Technical Specification

• Measurement technique: Video. Pupil and dual first Purkinje image
• Guaranteed sampling frequency: 50Hz
• Resolution: 0.1°
• Accuracy: 0.5° - 0.25°
• Horizontal range: ±40°
• Vertical range: ±20°
• Allowable head movement: ±10mm
• Latency: One frame (20ms)
• Measurement units: Fick, Helmholtz coordinates in degrees and screen position in mm
• CPU utilization: 10% for eye tracking with mimic and camera window (typical on a 1.8GHz Athlon processor)
• Software triggers: Implemented as Callback to user routine when subject looks into Region of Interest (ROI)
• Number of ROIs: Over 100

Optics

• Infrared illumination wavelength: 930nm
• Camera type: 50Hz
• image capture: Dedicated 32 bit, 33Mhz, PCI bus-mastering frame grabber for PC

Supplied Software

• In process COM server: Dual interface support late and early binding, with complete type library
• Toolbox demonstration programs: For Delphi, Visual Basic, C++Builder and MATLAB. Full source code provided
• videoEyetrace: Complete eye tracking environment, with mimic display and scrolling eye position graph. Includes visual stimuli for saccade and smooth pursuit experiments, plus bitmap images for reading and visual scanning experiments
• GazeTracker™ analysis software is NOT included, but can be purchased with the Video Eyetracker Toolbox at a special package price.

Minimum System Requirements

• Processor: 2 GHz Pentium 4 or AMD Athlon
• Memory: 256 MB RAM
• Hard disk drive 1GB
• Stimulus Display: ViSaGe visual stimulus generator or dual VGA display
• Motherboard: One free PCI slot to accommodate 125 mm x 70 mm PCI frame grabber. A second slot is necessary for the optional VSG2/5 visual stimulus generator
• Windows: Windows 98 SE or later