Abstract: An imaging system for and method of imaging product in a product flow (F), the system comprising: an illumination unit for illuminating product in the product flow with illumination at first and second, different wavelengths or ranges of different wavelengths; a detector unit (15) for detecting reflected illumination from product in the product flow, wherein the detector unit comprises first and second line array detectors, the line array detectors (17a, 17b) each comprising a plurality of pixel elements and extending as lines across a width of the product flow, one line downstream of the other, whereby product passing a pixel element of the first line array detector passes a corresponding pixel element of the second line array detector; a control unit for triggering the first and second illumination sources to flash sequentially at a scan rate corresponding to the flow rate of the product flow; and an image processing unit for successively reading the pixel lines of the first and second line array detectors

Abstract: An inspection apparatus for inspecting a flow of particulate material, comprising: a background reflector (105) adjacent which in use falls a flow of particulate material (F); and a lighting unit (107) for illuminating an elongate viewing field (VF) across the background reflector (105), the viewing field (VF) having a first width (w1); wherein the lighting unit (107) comprises a fixed, non-scanning light source (115), and the light source (115) is formed of one or more light elements (120) which define a second width (w2)which is shorter than the first width (w1) of the viewing field (VF).

Abstract: A light guide (15) for delivering an illumination, in particular a reference or background illumination, the light guide comprising: a mirror box (21) which defines a mirror cavity (23), which receives a light source (19) therein, and includes an illumination aperture (25) from which an illumination is delivered; a transmissive diffuser (27) which is located at the illumination aperture to render the illumination diffuse; and a shutter member (41) which is movable into the cavity to obstruct the light source and provide for control of the radiance of the delivered illumination, whereby control of the radiance of the delivered illumination is determined by a position of the shutter member in the cavity.

Abstract: A method of and apparatus for sorting foreign matter from a flow, the method comprising the steps of: identifying objects within a flow; for each identified object, determining reflectance intensities at at least two different wavelengths or ranges of wavelengths; and for each identified object, comparing the reflectance intensities at the at least two different wavelengths or ranges of wavelengths to a reference intensity profile, wherein the identified object is characterized as foreign matter when the reflectance intensities at the at least two different wavelengths or ranges of wavelengths fall within a predetermined region of the reference intensity profile.

Abstract: An imaging system for and method of imaging product in a product flow (F), the system comprising: an illumination unit for illuminating product in the product flow with illumination at first and second, different wavelengths or ranges of different wavelengths; a detector unit (15) for detecting reflected illumination from product in the product flow, wherein the detector unit comprises first and second line array detectors, the line array detectors (17a, 17b) each comprising a plurality of pixel elements and extending as lines across a width of the product flow, one line downstream of the other, whereby product passing a pixel element of the first line array detector passes a corresponding pixel element of the second line array detector; a control unit for triggering the first and second illumination sources to flash sequentially at a scan rate corresponding to the flow rate of the product flow; and an image processing unit for successively reading the pixel lines of the first and second line array detectors

Abstract: A process for whitening rice, comprising the steps of: moistening brown rice with a moistening agent, preferably comprising water and an additive selected from at least one of a sugar or a derivative thereof, including a sugar alcohol, and sodium chloride; and whitening the moistened brown rice, preferably immediately after the moistening step.