Structured Light 3D Scanner

grabcad

A 3D scanner is used to analyze three-dimensional objects and collect data such as their shape, size, texture, etc. The point cloud data can then be utilized in several different ways, including being imported into a CAD software package for modifications. There are several ways to go about building a homemade 3D scanner; each method involves using a light transmitter and receiver. Though, the method used in this project is the structured light method. Structured light 3D scanning can be accomplished using an overhead projector and a machine vision camera. Three dimensional scanning can be useful for engineers in need of a simplistic reverse engineering process. Version 1 Notes: -Acrylic plates are too flimsy -Lead screws are difficult to rotate -More lens separation from camera to projector is necessary -Camera must be angled up approximately 15 degrees, or projector must be angled down approximately 15 degrees, in relation to each other -Motion control, via lead screws, did not produce desired effect as scanner must be almost maxed out in each direction to get decent calibration and scan -Plastic ABS connectors used to connect aluminum square tubing can be purchased from http://estoconnectors.com/ -Version 1 will not be updated Links to other users GrabCad files used: Acer DSV0008 Projector HP 30" Monitor (modified) TEC-M55 TELECENTRIC LENS (suppressed to simplify assembly) Everest Wired Ultra-Thin Keyboard (Mini Compact) (certain components suppressed) Caster 3(Tockic) Version 2 will be a tripod based design, stay tuned!