EQUISET

Portable functional near-infrared spectroscopy system, LIGHTNIRS

Shimadzu (Japan)

Description

The Shimadzu LIGHTNIRS portable functional near-infrared spectroscopy system is designed for non-invasive investigation of hemodynamic responses in the cerebral cortex using near-infrared light (fNIRS). It measures changes from baseline in oxygenated hemoglobin (Oxy-Hb), deoxygenated hemoglobin (Deoxy-Hb), and total hemoglobin (Total-Hb), enabling researchers to investigate changes in blood oxygenation associated with neuronal activity during experimental tasks.

LIGHTNIRS features a compact housing and can operate from a lithium-ion battery. The unit can be carried or worn on the participant’s back, extending measurements beyond a fixed laboratory environment. A single unit supports up to 22 measurement channels, while two connected units can provide up to 52 channels.

Features

  • Non-invasive measurement of changes in Oxy-Hb, Deoxy-Hb, and Total-Hb using three-wavelength absorbance calculations.
  • Three-wavelength near-infrared semiconductor laser light source, Class 1.
  • Sensitive detection using an avalanche photodiode.
  • Up to 22 channels per unit or up to 52 channels with two connected systems.
  • Operation from an AC adapter or lithium-ion battery.
  • Compact design suitable for research on movement, behavior, and cognitive tasks in more natural settings.

For research use only. Not intended for diagnostic procedures.

Technical Specifications

Measurement method Three-wavelength absorbance calculation
Measured parameters Changes in Oxy-Hb, Deoxy-Hb, Total-Hb from baseline
Light source Near-infrared semiconductor lasers, 3 wavelengths, Class 1
Detector Avalanche photodiode
Number of channels Up to 22 channels (8 optical fiber pairs); up to 52 channels with two connected units
Power supply AC adapter (15 V input) or lithium-ion battery
External inputs 3 digital and 10 analog channels
Dimensions (W × D × H) 253 × 222 × 68 mm (excluding protrusions)
Weight Approx. 1.6 kg (excluding computer, batteries, and probes)
Operating conditions 15–30 °C; 45–85% relative humidity, non-condensing

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