Optoelectronic apparatus for and method of measuring organic tissue

An optoelectronic apparatus for measuring organic tissue, wherein the optoelectronic apparatus, which is attached with the organic tissue, comprises:

• a semiconductor optic radiation source, which is configured to output repeatedly infrared pulses of toward the tissue;
• an array of single-photon avalanche diodes, which is directed toward the tissue and which is configured to detect photons of the optical pulses that have interacted with the tissue;
• a timing unit, which is configured to determine time-of-flights of photons of each of the optical pulses within a temporal measurement range after an output of each of the optical pulses;
• a data processing unit, which is configured to estimate a physiological state at at least one unique depth range within the tissue using detected photons that have interacted with the tissue inside at least one time window shorter than the temporal measurement range, where each of the at least one time window is configured to correspond to a unique depth range within the tissue, the estimation being based on at least one of the following:
• a number of the detections within each of the at least one time window and a distribution of the detections of a plurality of time windows.