Overview

• Measuring Principle: Differential IR light reflection technique with amplitude modulation and synchronous detection
• Chopping Frequency: 2.5 kHz
• Eye Illumination: IR light solid state diodes
• IR light irradiance: well within recommended safety limits
• Interpupillary Adjustment Range : 48-78 mm; 40-70 mm (optional)
• Recording Configuration: Simultaneous horizontal or vertical eye movement recording of both eyes; horizontal eye movement recording of one eye and vertical eye movement recording of the other eye

Eye position

• Optimal Resolution: 2 min. arc
• Bandwidth: DC - 100 Hz (-3dB)
• Recording Range: Horizontal: ±30°; Vertical: ±20°
• Linearity: Horizontal: <3%, ±25°; Vertical: <3%, ±16°
• Field of View: Horizontal (vertical) 90 °; Vertical (horizontal) 35°
• Artefacts: Eye blinks (easily distinguished); Head movements; Excessive tears give baseline shift
• Crosstalk: Interference between horizontal and vertical eye movement adjustable to approximately 10%

Eye velocity

• Signal Source: Analog differentiation of the eye position signal
• Time Constant: 2 ms
• Bandwidth: DC - 100 Hz (-3dB)

Front panel indications & adjustments

• Display: Real time eye position of both eyes indicated by green coloured LED bar arrays
• Zero & Gain Adjustment: One-turn adjustment
• Eye Movement Direction: Horizontal or vertical, selectable by switch

Rear panel connections

• Analog Output Channels: BNC connectors, left and right eye position; BNC connectors, left and right eye velocity
• Output Range: ± 5 V
• Power Requirements: 100~240 V - 50/60 Hz; 12 V internal battery pack (optional)
• Safety: IEC601-1 / CE
• Dimensions: 320 x 300 x 165 mm
• Mass: 7.3 kg

Head mounted measuring device

• IR Light Transducers :2
• Sensor Adjustment: Each ILT can be adjusted in 3 perpendicular directions; Both ILTs can be rotated around horizontal axis
• Total Mass (incl. ITLs): 0.3 kg

Ordering information

• The Skalar IRIS model 6500 IR Light Eye Tracker costs from GBP5500 (ex-works, UK). This includes electronic control module, head mounted sensor device, standard length connection cable to interface the electronic control module and head mounted sensor device, an IR card for ILT emitter control, an instruction manual and an appropriate mains power cable. For pricing in other currencies, please check the price lists for your delivery destination.
• Various options and accessories are available. These include: a rechargeable battery pack, an extension cable to extend the length of the electronic control module interface cable, a lens holder or an eye cover, which can be attached to the ILT. An IR light detection card is available, which is useful for checking the IR light emitting diodes. Additional head sets, with and without ILTs, can also be delivered with the system.