Triangulation scanner with blue-light projector

Patent metadata

Field	Value
Publication number	US-11262194-B2
Application number	US-202017115018-A
Country	US
Kind code	B2
Filing date	Dec 8, 2020
Priority date	Apr 24, 2015
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A triangulation scanner having an enclosure, a projector coupled to the enclosure and configured to emit a first light, and three cameras also coupled to the enclosure. The scanner further includes at least one processor to determine the three-dimensional coordinates in a local frame of reference based at least in part on receiving the first light.

First claim

What is claimed is:

1. A scanner comprising:
an enclosure;
a projector coupled to the enclosure and configured to emit a first light having a first wavelength of about 450 nm;
a first camera coupled to the enclosure and configured to receive a reflection of the first light off a surface in the environment, the first camera including a first filter configured to pass the first light having about the first wavelength;
at least one light source coupled to the enclosure and configured to emit a second light, the second light having a second wavelength, the second wavelength being different than the first wavelength;
at least one second camera coupled to the enclosure and having a second filter configured to pass the second light having the second wavelength; and
one or more processors operable to determine three-dimensional coordinates in a local frame of reference based at least in part on a receiving of the first light by the first camera.

2. The scanner of claim 1 , wherein the one or more processors is further operable to register the three-dimensional coordinates in a common frame of reference based at least in part on receiving a reflection of the second light off of markers disposed on an object being scanned.

3. The scanner of claim 2 , wherein the second wavelength is about 800 nm.

4. The scanner of claim 2 , wherein the projector is configured to emit a line of light.

5. The scanner of claim 2 , wherein the projector includes a digital micromirror device.

6. The scanner of claim 5 , wherein the digital micromirror device is configured to sweep a line of light or a spot of light over the object being scanned.

7. The scanner of claim 1 , wherein the enclosure is configured to be removably coupled to an articulated arm coordinate measurement machine.

8. The scanner of claim 2 , wherein the one or more processors is further operable to operate the projector, the first camera, the at least one light source, and the at least one second camera synchronously.

9. The scanner of claim 1 , further comprising a display coupled to the enclosure, the display being operable to display the three-dimensional coordinates.

10. The scanner of claim 1 , further comprising a battery removably coupled to the enclosure.

11. The scanner of claim 1 , further comprising a texture camera coupled to the enclosure, wherein the one or more processors are further configured to apply a texture acquired by the texture camera to the three-dimensional coordinates.

12. The scanner of claim 1 , further comprising a marker light source coupled to the enclosure, the marker light source being arranged to emit a beam of light that intersects the first light when the scanner is positioned at a predetermined distance from an object being scanned.

13. A method of scanning an object with a scanner having an enclosure, the method comprising:
emitting a first light from a projector, the first light having a wavelength of about 450 nm the projector being coupled to the enclosure;
receiving a reflection of the first light reflected off of a surface of the object with a first camera, the first camera being coupled to the enclosure;
emitting a second light from at least one light source, the second light having a second wavelength, the second wavelength being different than the first wavelength, the at least one light source being coupled to the enclosure;
receiving the a reflection of the second light reflected off the surface of the object with at least one second camera, the at least one second camera acquiring a two-dimensional image of one or more markers disposed on the surface based at least in part on the receiving of the reflection of the second light, the at least one second camera being coupled to the enclosure; and
determining with a processor three-dimensional coordinates in a local frame of reference of points on the surface of the object based at least in part on the receiving of the reflection of the first light.

14. The method of claim 13 , further comprising registering the three-dimensional coordinates in a common frame of reference based at least in part on the one or more markers in the two-dimensional image.

15. The method of claim 13 , wherein the first light is emitted as a plane of light.

16. The method of claim 13 , further comprising sweeping the first light across the surface with the projector.

17. The method of claim 13 , further comprising uncoupling the enclosure from an articulated arm coordinate measurement machine.

18. The method of claim 13 , wherein the emitting of the first light, the receiving of the reflection of the first light, the emitting of the second light and the receiving of the reflection of the second light are performed synchronously.

19. The method of claim of claim 13 , wherein the second wavelength is about 800 nm.

20. The method of claim 19 , wherein the first camera includes a first filter that passes light having about the first wavelength and the at least one second camera includes a second filter that passes light having about the second wavelength.

Assignees

• Faro Tech Inc

Inventors

• Tohme Yazid
• Heidemann Rolf
• Grau Markus
• Bridges Robert E

Classifications

• H04N1/60

  Colour correction or control {(H04N1/54 takes precedence)} · CPC title

• H04N13/239

  using two two-dimensional [2D] image sensors having a relative position equal to or related to the interocular distance (H04N13/243 takes precedence) · CPC title

• G01B11/2518

  Projection by scanning of the object · CPC title

• H04N13/257

  Colour aspects · CPC title

• G01B11/245

  using a plurality of fixed, simultaneously operating transducers ({G01B11/2408 - G01B11/2425, } G01B11/255 take precedence) · CPC title