Patent Number: 047456310
Section: claims

1. A flying spot generator comprising first means for forming a beam of radiation,  second means for generating a flying spot of said radiation from said beam, said second means including a rotating cylinder having an even number of helical slots through which said beam passes to form said flying spot, said first means being located outside of the region occupied by said second means,  third means for placing objects to be inspected in said flying spot, and  fourth means for detecting said flying spot after traversing through said objects. 2. A flying spot generator according to claim 1, wherein said cylinder is of radiation absorbent material, and said helical slots pass said radiation. 3. A flying spot generator according to claim 2, wherein said flying spot is linearly directed along said fourth means for detecting. 4. A flying spot generator according to claim 3, wherein said fourth means for detecting is long and receives said flying spot in a linear arrangement. 5. A flying spot generator according to claim 4, wherein said radiation is x-radiation, and said helical slots pass x-rays. 6. A flying spot generator according to claim 4, wherein said third means moves said objects to be inspected through said flying spot. 7. A flying spot generator according to claim 6, wherein said third means is a conveyor arrangement. 8. A flying spot generator according to claim 1, wherein said radiation is x-radiation. 9. A flying spot generator according to claim 1, wherein siad radiation is x-radiation, and said helical slots pass x-rays. 10. A flying spot generator according to claim 1, wherein said third means is a conveyor arrangement for moving said objects to be inspected through said flying spot. 11. A flying spot generator according to claim 1, wherein said first means forms a fan beam of x-rays. 12. A flying spot generator comprising first means for forming a beam of radiation, second means for generating a flying spot of said radiation from said beam, said second means including a rotating cylinder having two helical slots through which said beam pases to form said flying spot, said first means being located outside of the region occupied by said second means, third means for placing objects to be inspected in said flying spot, and fourth means for detecting said flying spot after traversing through said objects.