Patent Number: 
Section: claims

1. A collimation device for a dental imaging apparatus, the collimation device comprising:a collimator housing having a first end and a second end opposite to the first end, the collimator housing being configured to allow x-rays to move through the device in a direction from the first end to the second end; anda collimator plate constructed to at least partially block the passage of some of the x-rays moving through the device,wherein the collimator plate is movable relative to the collimator housing between a first position to a second position along the collimator housing, with the collimator plate being closer to the first end of the collimator housing when the collimator plate is in the first position than the collimator plate is to the first end of the collimator housing when the collimator plate is in the second position. 2. The collimation device of claim 1, wherein the collimator plate is movable to a third position between the first position and the second position. 3. The collimation device of claim 1, further comprising:a light emitting alignment device connected to the collimator housing and configured to generate a patterned light beam. 4. The collimation device of claim 1, further comprising:a collimator chassis,wherein the collimator housing is rotatably connected to the collimator chassis such that the collimator housing is rotatable between a first orientation and a second orientation. 5. The collimation device of claim 1, wherein an exterior surface of the collimator housing includes a first indicator indicating the first position and a second indicator indicating the second position. 6. The collimation device of claim 3, wherein the patterned light beam is a circular pattern. 7. The collimation device of claim 4, wherein the second orientation is ninety degrees from the first orientation. 8. The collimation device of claim 4, further comprising:a laser device connected to the collimator chassis and configured to emanate a laser beam. 9. The collimation device of claim 4, wherein the collimator housing includes a first pair of indexing elements and a second pair of indexing elements,wherein the collimator chassis includes a third pair of indexing elements,wherein the first pair of indexing elements are proximate to the third pair of indexing elements when the collimator housing and the collimator chassis are in the first orientation, andwherein the second pair of indexing elements are proximate to the third pair of indexing elements when the collimator housing and the collimator chassis are in the second orientation. 10. A collimation device for a dental imaging apparatus, the collimation device comprising:a collimator housing having a first end and a second end opposite to the first end, the collimator housing being configured to allow x-rays to move through the device in a direction from the first end to the second end;a collimator plate constructed to at least partially block the passage of some of the x-rays moving through the device; anda collimator mount assembly connected to the collimator plate,wherein the collimator housing includes a guide rail on which the collimator mount assembly is movable between a first position and a second position along the collimator housing, andwherein the collimator plate is closer to the first end of the collimator housing when the collimator plate is in the first position than the collimator plate is to the first end of the collimator housing when the collimator plate is in the second position. 11. An x-ray imaging system comprising:an x-ray source configured to generate an x-ray beam; anda collimation device connected to the x-ray source and arranged to receive the x-ray beam generated by the x-ray source, the collimation device including:a collimator housing having a first end and a second end opposite to the first end, the collimator housing being configured to allow x-rays of the x-ray beam to move through the device in a direction from the first end to the second end; anda collimator plate constructed to at least partially block the passage of some of the x-rays of the x-ray beam moving through the device, the collimator plate being movable relative to the collimator housing between a first position to a second position along the collimator housing, with the collimator plate being closer to the first end of the collimator housing when the collimator plate is in the first position than the collimator plate is to the first end of the collimator housing when the collimator plate is in the second position. 12. The x-ray imaging system of claim 11, wherein the collimator plate is movable to a third position between the first position and the second position. 13. The x-ray imaging system of claim 11, wherein the collimation device further comprises a light emitting alignment device connected to the collimator housing and configured to generate a patterned light beam in a direction of an aiming ring. 14. The x-ray imaging system of claim 11, wherein the collimation device further comprises:a collimator chassis,wherein the collimator housing is rotatably connected to the collimator chassis such that the collimator housing is rotatable between a first orientation and a second orientation. 15. The x-ray imaging system of claim 11, wherein an exterior surface of the collimator housing includes a first indicator indicating the first position and a second indicator indicating the second position. 16. The x-ray imaging system of claim 13, wherein the patterned light beam is a circular pattern. 17. The x-ray imaging system of claim 13, further comprising:an x-ray detector; andan alignment device that includes:a holder for holding the x-ray detector,an alignment ring, anda connecting arm connecting the holder to the alignment ring,wherein the alignment ring includes a primary alignment groove disposed on a side thereof, andwherein when the patterned light beam generated by the light emitting alignment device falls entirely within the primary alignment groove, the x-ray source is properly positioned and aligned relative to the x-ray detector. 18. The x-ray imaging system of claim 14, wherein the second orientation is ninety degrees from the first orientation. 19. The x-ray imaging system of claim 14, wherein the collimation device further comprises:a plurality of laser devices connected to the collimator chassis and configured to emanate respective laser beams. 20. The x-ray imaging system of claim 14,wherein the collimator housing includes a first pair of indexing elements and a second pair of indexing elements,wherein the collimator chassis includes a third pair of indexing elements,wherein the first pair of indexing elements are proximate to the third pair of indexing elements when the collimator housing and the collimator chassis are in the first orientation, andwherein the second pair of indexing elements are proximate to the third pair of indexing elements when the collimator housing and the collimator chassis are in the second orientation.