Patent Number: 
Section: claims

1. A collimating body, comprising:a first collimating portion, wherein the first collimating portion includes at least one first collimating hole set; anda second collimating portion, wherein the second collimating portion includes a plurality of second collimating hole sets;wherein the first collimating portion and the second collimating portion are arranged side by side in a side-by-side direction and closely fitted; and the first collimating portion and the second collimating portion are able to move oppositely in a direction perpendicular to the side-by-side direction, so as to align or stagger the at least one first collimating hole set and a second collimating hole set of the plurality of second collimating hole sets;the plurality of second collimating hole sets are distributed in the direction perpendicular to the side-by-side direction;at least one of the plurality of second collimating hole sets is configured in a way that an aperture size of each second collimating hole in the at least one of the plurality of second collimating hole sets is not equal to an aperture size of each second collimating hole in other second collimating hole sets of the plurality of second collimating hole sets; andeach first collimating hole and each second collimating hole do not overlap in a direction in which a ray beam passes. 2. The collimating body according to claim 1, whereinthe at least one first collimating hole set includes a plurality of first collimating hole sets, and the plurality of first collimating hole sets are distributed in the direction perpendicular to the side-by-side direction; andat least one of the plurality of first collimating hole sets is configured in a way that an aperture size of each first collimating hole in the at least one of the plurality of first collimating hole sets is not equal to an aperture size of each first collimating hole in other first collimating hole sets of the plurality of first collimating hole sets. 3. The collimating body according to claim 1, wherein the at least one first collimating hole set includes a plurality of first collimating hole sets, and an aperture size of each of the plurality of first collimating hole sets is not equal to each other; andan aperture size of each of the plurality of second collimating hole sets not equal to each other. 4. The collimating body according to claim 3, wherein the number of the first collimating hole sets included in the plurality of first collimating hole sets is equal to the number of the second collimating hole sets included in the plurality of second collimating hole sets. 5. The collimating body according to claim 3, wherein the number of the first collimating holes included in each first collimating hole set of the plurality of first collimating hole sets is equal to the number of the second collimating holes included in each second collimating hole set of the plurality of second collimating hole sets. 6. The collimating body according to claim 3, wherein the number of the first collimating holes included in each first collimating hole set of the plurality of first collimating hole sets is different from the number of the second collimating holes included in each second collimating hole set of the plurality of second collimating hole sets. 7. The collimating body according to claim 1, wherein the at least one first collimating hole set includes a plurality of first collimating holes having a same aperture size, and the plurality of second collimating holes have a same aperture size. 8. The collimating body according to claim 7, wherein the at least one first collimating hole set includes a plurality of first collimating hole sets; andan aperture size of each of the plurality of first collimating hole sets is equal to an aperture size of each of the plurality of second collimating hole sets in one-to-one correspondence. 9. The collimating body according to claim 1, further comprising a first driving portion, and the first driving portion being configured to drive the first collimating portion to move in the direction perpendicular to the side-by-side direction relative to the second collimating portion. 10. The collimating body according to claim 9, further comprising a first brake portion, and the first brake portion being configured to limit a movement of the first driving portion. 11. The collimating body according to claim 10, further comprising a second driving portion, and the second driving portion being configured to drive the second collimating portion to move in the direction perpendicular to the side-by-side direction relative to the first collimating portion. 12. The collimating body according to claim 11, further comprising a second brake portion, and the second brake portion being configured to limit a movement of the second driving portion. 13. The collimating body according to claim 1, wherein the first collimating portion includes a first stepped portion; andthe second collimating portion includes a second stepped portion that cooperates with the first stepped portion. 14. The collimating body according to claim 1, wherein the at least one first collimating hole set includes a plurality of first collimating holes with aperture sizes which are not equal to each other, and the second collimating hole set of the plurality of second collimating hole sets includes a plurality of second collimating holes with aperture sizes which are not equal to each other. 15. A multi-source focusing radiation therapy head, comprising the collimating body according to claim 1.