Patent ID: 8430512

Claim:
A device for projecting and scanning, comprising: a tracer beam generator that is arranged to project a tracer beam on a surface such that a tracer beam spot is formed on the surface, and such that a position of the tracer beam spot relative to the surface changes over time; a scanner that is arranged to project a beam on the surface such that an illuminated spot is formed on the surface, such that a position of the illuminated spot relative to the surface changes over time, and such that there is a correlation between the position of the illuminated spot and the position of the tracer beam spot that is constant over time; detection components that are arranged to detect a location of the tracer beam spot by detecting a reflection of the tracer beam, such that the detected location includes a set of coordinates that define the location of the tracer beam spot relative to the surface, wherein the detection components are further arranged to provide location information based on the detected location at different times, and wherein the detection components are further arranged to receive a portion of light reflected from the illuminated spot, and to measure the color intensity of the illuminated spot at different times; and a processor that is configured to determine, from the location information, a scan line trajectory of the tracer beam across the surface, and further configured to match the color intensity measurements with positions along the scan line trajectory.