Patent Number: 
Section: claims

1. A ray beam guiding device for guiding ray beams in a ray inspection apparatus, the ray beam guiding device being provided in a housing of the ray inspection apparatus, two ends of the ray beam guiding device being connected to a front collimator and a rear collimator, respectively, the ray beam guiding device comprising a plurality of guiding walls and a guiding cavity surrounded by the guiding walls,wherein the guiding walls are formed of a first material which is capable of absorbing rays or the first material is coated on an inside of the guiding walls, and the guiding cavity has a central axis extending in a direction from the rear collimator to the front collimator, andwherein the ray beam guiding device further comprises at least one fin plate provided in the guiding cavity of the ray beam guiding device, the at least one fin plate being configured for blocking and/or absorbing scattered rays. 2. The ray beam guiding device according to claim 1, wherein the ray beam guiding device comprises a rear fin portion provided on an end of the rear collimator located in the guiding cavity, the rear fin portion comprising at least one fin plate. 3. The ray beam guiding device according to claim 1, wherein the ray beam guiding device comprises a front fin portion provided on an end of the front collimator located in the guiding cavity, the front fin portion comprising at least one fin plate. 4. The ray beam guiding device according to claim 1, wherein the fin plate is sized such that most of the scattered rays through the front collimator and/or the rear collimator are blocked by the fin plate. 5. The ray beam guiding device according to claim 1, wherein the fin plate is formed of a second material which is capable of absorbing rays or the second material is coated on a side of the fin plate facing towards the central axis of the guiding cavity, for absorbing the scattered rays through the front collimator and/or the rear collimator. 6. The ray beam guiding device according to claim 1, wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity. 7. The ray beam guiding device according to claim 2, wherein the rear fin portion comprises a first fin plate and a second fin plate, and the first fin plate and the second fin plate are symmetrical with respect to the central axis of the guiding cavity. 8. The ray beam guiding device according to claim 2, wherein the rear fin portion consists of one fin plate located at one side of the central axis of the guiding cavity. 9. The ray beam guiding device according to claim 5, wherein the first material and the second material are the same material. 10. A ray inspection apparatus, comprising:a ray source configured to generate rays;a rear collimator configured to process the rays generated by the ray source into a ray beam with a specific shape;a front collimator configured to divide the ray beam penetrating an object to be inspected into a plurality of ray beams;a detector;a ray beam guiding device according to claim 1;wherein the ray beam guiding device is arranged between the front collimator and the rear collimator. 11. The ray beam guiding device according to claim 2, wherein the ray beam guiding device comprises a front fin portion provided on an end of the front collimator located in the guiding cavity, the front fin portion comprising at least one fin plate. 12. The ray beam guiding device according to claim 2, wherein the fin plate is sized such that most of the scattered rays through the front collimator and/or the rear collimator are blocked by the fin plate. 13. The ray beam guiding device according to claim 3, wherein the fin plate is sized such that most of the scattered rays through the front collimator and/or the rear collimator are blocked by the fin plate. 14. The ray beam guiding device according to claim 2, wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity. 15. The ray beam guiding device according to claim 3, wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity. 16. The ray beam guiding device according to claim 4, wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity. 17. The ray beam guiding device according to claim 5, wherein each fin plate comprises a first portion connected to the front collimator and/or the rear collimator and a second portion extending parallel to the central axis of the guiding cavity. 18. The ray beam guiding device according to claim 3, wherein the front fin portion comprises a first fin plate and a second fin plate, and the first fin plate and the second fin plate are symmetrical with respect to the central axis of the guiding cavity. 19. The ray beam guiding device according to claim 11, wherein the front fin portion and the rear fin portion both comprise a first fin plate and a second fin plate, and the first fin plate and the second fin plate are symmetrical with respect to the central axis of the guiding cavity. 20. The ray beam guiding device according to claim 3, wherein the front fin portion consists of one fin plate located at one side of the central axis of the guiding cavity.