Hyperspectral imaging device and method

A device for hyperspectral correlation imaging comprising:

• an acquisition window,
• a beam splitter configured for splitting a primary light beam coming from an object and entering the acquisition window into a first secondary beam having a first optical path and including a plurality of first secondary light signals, and a second secondary beam having a second optical path and including a plurality of second secondary light signals,
• a first sensor configured to be impinged by the first secondary beam,
• a second sensor configured to be impinged by the second secondary beam,
• wherein:
• the first sensor is configured to retrieve, from the first secondary beam, an image of the object, the image comprising a plurality of spatial locations, each defined by the impingement of a first secondary light signal of the plurality of first secondary light signals on the first sensor, and
• the second sensor is configured to retrieve from the second secondary beam, and for each spatial location of the image, a frequency spectrum information,
• the device further including a processing unit configured to retrieve a hyperspectral image of the object through a measure of correlation between:
• a first light intensity information collected over an exposure time at a spatial location on the first sensor associated to the first secondary light signal of the plurality of first secondary light signals, and
• a second light intensity information collected over the exposure time at a location on the second sensor associated to a second secondary light signal of the plurality of second secondary light signals paired with the first secondary light signal of the first secondary beam, the second light intensity information being provided for each frequency in the frequency spectrum information retrieved by the second sensor,
• wherein said measure of correlation is a measure of statistical covariance between the first light intensity information collected over the exposure time and the second light intensity information collected over the exposure time.