| 摘要 |
A 3D triangulation scanner includes a projector, a camera, and a processor. At least one of the projector and the camera has a zoom lens and a motorized zoom adjustment mechanism. The processor is responsive to executable instructions that uses triangulation calculations to calculate 3D coordinates of points on a surface that are based at least in part on a baseline length, an orientation of the projector and the camera, a position of a corresponding source point on an illuminated pattern source of the projector, and a position of a corresponding image point on a photosensitive array of the camera. The 3D coordinates of the points are calculated at one time and at another time, at least one of the projector FOV being wider at the one time than at the another time or the camera FOV being wider at the one time than at the another time. |
| 主权项 |
1. A noncontact optical three-dimensional (3D) scanning and measuring device, comprising:
a projector having an illuminated pattern source, a projector field of view (FOV), a projector perspective center, a projector near plane, and projector far plane, wherein a 3D region of space when disposed within the projector FOV and between the projector near plane and the projector far plane defines a projection-in-focus region; a camera having a photosensitive array, a camera FOV, a camera perspective center, a camera near plane, and a camera far plane, wherein a 3D region of space when disposed within the camera FOV and between the camera near plane and the camera far plane defines a camera-in-focus region; and a processor in signal communication with the projector and the camera; wherein the camera perspective center and the projector perspective center are disposed in relation to each other by a baseline having a baseline length; wherein at least one of the projector and the camera comprises a zoom lens and a motorized zoom adjustment mechanism; wherein the projector and the camera have a sweet-spot region that includes an overlap of the camera-in-focus region and the projector-in-focus region; wherein 3D coordinates of points on a surface to be measured are measured when located within the sweet-spot region; wherein the processor is responsive to executable instructions which when executed by the processor uses triangulation calculations to calculate the 3D coordinates of the points on the surface that are based at least in part on the baseline length, an orientation of the projector and the camera relative to the baseline, a position of a corresponding source point on the illuminated pattern source, and a position of a corresponding image point on the photosensitive array; and wherein the 3D coordinates of the points on the surface are calculated at one time and at another time, at least one of the projector FOV being wider at the one time than at the another time or the camera FOV being wider at the one time than at the another time. |
