Patent ID: 8929642
Filing Date: 2015-01-06
Classification: G01B

Abstract:
1. A three-dimensional scanner comprising: a laser configured to emit a slit-shaped light beam; a reflective plate configured to reflect the light beam emitted from the laser to change an irradiation position of the light beam on a measuring object by rotating a reflective surface of the reflective plate; an imaging sensor configured to sequentially capture images of the measuring object while the laser emits the light beam on the measuring object; an image-information obtaining unit configured to obtain the images captured by the imaging sensor and to store the images in a storage unit; a position detecting unit configured to detect, by scanning a first image among images stored in the storage unit, a position of the light beam in the first image; and a scanning-region determining unit configured to determine a scanning region in the first image based on a position of the light beam in a second image captured immediately before the first image by the imaging sensor, wherein the position detecting unit scans the first image while sequentially moving a scanning start position in each scanning in a scanning direction, which is a moving direction of the light beam on the first image by changing of the irradiation position, in a direction orthogonal to the scanning direction, and the scanning-region determining unit determines the scanning region for each scanning in the scanning direction, determines a position of the light beam in the second image as the scanning start position in the first image, and determines a position, which is away from the scanning start position in the first image by a predetermined distance in the scanning direction, as a scanning end position.