Abstract: An event related optical signal, EROS, neuroimaging and analysis system for monitoring activity of a subject's brain, the system comprising: a first wavelength-swept light source configured to provide wavelength-swept emission of coherent light; and a plurality of light detectors; wherein the first wavelength-swept light source is arranged to both: (i) deliver the light towards the subject's brain tissue to be scattered to the detectors, and (ii) deliver the light to each of the detectors via one or more reference channels; wherein each of the light detectors comprises: a first input port arranged to receive scattered light from the subject's brain tissue; a second input port coupled to one of the reference channels to receive reference light from the first light source; a light combiner connected to both the first input port and the second input port for combining the scattered light received from the subject's brain tissue with the reference light received from the reference channel to provide a combined li

Abstract: An interferometric near infrared spectroscopy, iNIRS, system comprising: a light emitting arrangement comprising a light source configured to provide wavelength swept emission of light; and a light detecting arrangement comprising an interferometric optical detector; the iNIRS system comprising a plurality of optical channels arranged to define; a first optical channel path arranged to extend: (i) between the light source and the object for delivering first sample light from the light source to the object, and (ii) between the object and the detector for delivering first sample light received from the object to the detector; a second optical channel path arranged to extend: (i) between the light source and the object for delivering second sample light from the light source to the object, and (ii) between the object and the detector for delivering second sample light received from the object to the detector; and a reference optical channel path arranged to extend between the light source and the detector for d