historischer markt aarau

3d coin scanner

this 3d scanner is a simple scanner for high resolution 3d scanning of small objects such as coins. the scanner uses off the shelf components such as:

  • usb camera to capture images (logitech c920)
  • arduino uno to drive the stepper motor
  • stepper motor driver (ULN2003)
  • geared stepper motor (28YBJ-48)
  • leds (some bright led’s)

the images are analyzed and the 3d data is extracted as a point cloud, ready for meshing.

the following image shows a prototype of the scanner. the coin has to be placed on the carriage via the opening. the stepper motor then moves the coin under the camera where it is illuminated by an led.

CoinScanner

sample scans can be seen in the following image gallery.

you can download some of these scans on thingiverse.

the simplified 3d scanning workflow is shown in the following images.