MULTISPECTRAL LASER PHOTOSEPARATOR Russian patent published in 2016 - IPC B07C99/00 

FIELD: optics.

SUBSTANCE: multispectral laser photoseparator is intended for scanning of moving objects and making images, separated on spectral intervals, corresponding to three and more frequencies in mode of laser light reflected and transmitted radiation. Preferable application is sorting of agricultural products. Photoseparator comprises device for transportation of sorted material, fibre-optic device for summation of three and more laser light sources, scanning device of total laser beam in line, focused at object plane of image capturing, reading device and image processing device for removal of defective materials. Linear lighting acts as spectrometer slot. Radiation scattered by object, after passing through collimating lens and diffraction on phase diffraction grating is decomposed to zero, +1^st and -1^st orders of diffraction. In first order chamber lenses are placed, projecting image on monochromatic linear sensors, each of which registers one of spectral intervals.

EFFECT: combined digital image processing provides allows to separate objects by spectral characteristics.

3 cl, 1 dwg