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Screen and projector

Equipment required

  • The screen

Before measurement

  1. Drag the mirror into the right position
  2. Place monitor in front of the mirror at the markings on the floor
  3. Turn on projector by pressing on time at the remote control

! If participant is seated in the chair, be careful not to blind the participant with the light from the projector

During measurement

Just remember that the participant can see what you see on the screen.

After measurement

  1. Move the screen away from the chair
  2. Turn off the projector by pressing twice on the remote

Projector specifications

For visual stimulation, we use a FL35 LED DLP projector from Projection Design. The current installation runs at 32 bit color in 1920*1080 @ 120 fps.. Maximum field of view for visual presentation is about 63 (horizontal) * 41 (vertical) degrees.

In standard settings (16:9 ratio, 1920x1080 resolution, 120 fps, 100 cm distance), the projector fills a 72 x 44 cm rectangle on the screen, ca 40 x 25 degrees of the visual field.

Presenting a white picture on the screen gives 100 lumen on screen, 30 lumen at eye position.

The visual stimulation is typically controlled via Neurobs Presentation, in which case the computer-to-eye delay is about 8 ms, with no frame drops or frame doubles.

  • Further technical specifications for the projector are found here.