Dot matrix bụ usoro nke ikuku laser.Ngwá ọrụ laser MED-870+ nwere ihe na-emepụta ihe oyiyi pụrụ iche (CPG).Ihe na-emepụta ihe oyiyi na-agbanwe ụdị mgbapụta nke ìhè.Enwere ike ịgbanye laser lattice site na enyo lekwasịrị anya dị elu.50μm-80μm focal spot, na nyochaa ebe ndị a hiwere isi n'ime ruo 6 ụdị akụkụ anọ ụkpụrụ (okirikiri, square, rektangulu, diamond, triangle, akara), nke kwesịrị ekwesị maka ọgwụgwọ nke dị iche iche akụkụ na dị iche iche akpụkpọ ụdị.