TM3 Hardware Installation Manual
©Eyetech Digital Systems, Inc.
Modified on 4/10/2008
4
1.1 Safety Information
1.1
Safety Information on Infrared (IR) Lights
VT2 uses IR lights to illuminate the eyes and provide reference points for the eye
tracker. The IR light is produced by LED’s at a wavelength of 850 nanometers. This
type of IR light occurs naturally in sunlight and in light from incandescent lamps.
The total power consumed by the lights is approximately 3 watts. The measured
irradiance at the user’s eye under normal operating conditions is less than 1
milliwatt per square centimeter. This is well within the safety guidelines given in
the book
1996 TLVs and BEIs
by the American Conference of Governmental
Industrial Hygienists.
You may want to consider replacing incandescent bulbs with compact fluorescent
bulbs if you experience lighting problems.
1.2
Safety Information on Magnetic field strength
The VT2 uses internal magnets, as a result close proximity to a pace maker or
implantable cardioverter-defibrillator (ICD) may result in deactivation of these
medical devices. It is not recommended to get the VT2 within 2 inches of a pace
maker or ICD.
