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ET-50 (Legacy)

Camera based systems with 1250 frames per second

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ET-50 (Legacy)

Camera based systems with 1250 frames per second

The video camera based eye tracking system ET-50 was developed by Thomas RECORDING GmbH in cooperation with the Department of Applied Physics and Neurophysics at the University of Marburg.

This product is no longer available but still being supported and serviced. Please find our new Eye Tracking Systems HERE

Key features:

  • Frame rate: 1250Hz, low signal latency
  • High precision & quality “Made in GERMANY” by Thomas RECORDING
  • Video Camera based, no head mounted components
  • Custom-made adaptions for a wide range of applications on request
  • Resolution 0.05°, Accuracy 0.083°
  • Detection Method: dark pupil detection
  • Analog & digital eye position output available
  • Infrared (IR) illumination
Technical Data
Detection Method:Dark Pupil

The system is constructed for neuro-scientific purposes and enables a laboratory to correlate the monkey’s eye position to the shown stimuli without any surgery and with sufficient accuracy for most applications.
With the given resolution of about 3 minutes visual angle and an accuracy of about ±5 minutes visual angle the eyetracker replaces usual eye-coil systems.


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[2] Seo, H. Lee, D. Behavioral and neural changes after gains and losses of conditioned reinforcers The Journal of Neuroscience, March 18, 2009, 29(11):3627-3641

[3] Womeldorf , T.; Anton-Erxleben, K.; Treue, S. Receptive Field Shift and shrinkage in macaque middle temporal  area through attentional gain modulation The Journal of Neuroscience, September 3, 2008, 28(36):8934-8944

[4] Katzner, S.; Busse, L.; Treue, S. Attention to the color of a moving stimulus modulates motion-signal processing in a macaque area MT: evidence for a unified attentional system Frontiers in Systems Neuroscience

[5] Seo, H.; Lee, D. Temporal Filtering of reward signals in the dorsal anterior cingulate cortex during mixed-strategy game The Journal of Neuroscience, August  1, 2007, 27(31):8366-8377

[6] Womelsdorf T., Anton-Erxleben K., Pieper F., Treue S. Dynamic shifts of visual receptive fields in cortical area MT by spatial attention Nature Neuroscience 9, 1156 – 1160 (01 Sep 2006) Article

[7] Lee D, Conroy ML, McGreevy BP, Barraclough DJ Reinforcement learning and decision making in mokeys during a competitve game Cognitive Brain Research, Vol. 22, No.1 (Dec 2004), pp.45-58

[8] Barraclough D.J., Conroy M.L. & Lee D. Prefrontal cortex and decision making in a mixed-strategy game Nature Neuroscience, Vol.7, No.4, April 2004

[9] Gail A., Brinksmeyer H.J., Eckhorn R. Simultaneous mapping of binocular and monocular receptive fields in awake monkeys for calibrating eye alignment in a dichoptical setup Journal of Neuroscience Methods 126 (2003) 41-56

[10] Westendorff S., Klaes C., Gail A. The Cortical Timeline for Deciding on Reach Motor Goals The Journal of Neuroscience April 14,2010 30(15):5426-5436

[11] Gail A., Klaes C., Westendorff S. Implementation of Spatial Transformation Rules for Goal-Directed Reaching via Gain Modulation in Monkey Parietal and Premotor Cortex The Journal of Neuroscience July 29,2009 29(30):9490-9499

[12] Schwenk, J. C. B., Klingenhoefer, S., Werner, B. O., Dowiasch, S., & Bremmer, F. (2021). Perisaccadic encoding of temporal information in macaque area V4. Journal of Neurophysiology.

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