An automatic sorting system is for identifying and sorting non-homogenous
material. The system includes a conveyor belt and an identification unit
cooperable with the conveyor belt and placed above the conveying surface
thereof for identifying material traveling therealong. The identification
unit includes at least one projector for projecting a beam of light
downwardly towards the conveying surface, at a given height above the
conveying surface, and onto a given material to be identified, so that a
portion of projected light may be reflected back from the given material
and upwardly towards the identification unit. The identification unit
also includes at least one lens positioned about the identification unit
for receiving the portion of reflected light from the given material to
be identified. The identification unit also includes a first processing
unit operatively linked to the at least one lens for carrying a spectral
analysis of the portion of reflected light captured by the at least one
lens so as to determine the nature of the given material, and a second
processing unit operatively linked to the first processing unit for
comparing results of the spectral analysis with corresponding data
associated to a variety of different materials stored in a given database
of the second processing unit. The present system also includes a sorting
unit operatively linked to the second processing unit and operatively
cooperating with the second end of the conveyor so as to sort material
released from the second end of the conveyor depending on signals
received from the second processing unit.