Photo-detectors: Silicon photodiode with integrated trans-impedance preamp
Photo-emitters: 730 nm/850 nm dual wave-length LED
Material: silicone rubber over-molded
The phantom sensor material mimics optical properties of brain tissue, and it is used to test the system to make sure that the fNIR sensor is detecting correctly.
See the fNIR COBI Manual for details on how to run a Self-Check to test signal levels at each channel and generate a report that indicates performance on each channel.