Design of a fiber optics fringe projector for 3D reconstruction of dental elements

Author

Casavola, C. ; Pappalettera, G. ; Pappalettere, C.

Author_Institution

Dipt. di Meccanica Mat. e Manage., Politec. di Bari, Bari, Italy

fYear

2014

fDate

7-9 May 2014

Firstpage

1

Lastpage

3

Abstract

In this paper the design of a miniaturized fringe-projector is presented. The projector is intended to be inserted in a triangulation scheme in order to allow implementation of projection moiré technique. The system is specifically designed to be part of a device for contouring complex shapes like those of dental elements. The proposed fringe projection system is based upon the projection of the pattern obtained as a result of the interference between the two points-like sources constituted by the wavefronts emerging by two fiber tips put next together. Results obtained on calibrated specimens confirms the feasibility of the proposed approach. In fact, shape errors observed for the calibrated specimens are below the level of precision required in tooth reconstruction (100 μm).

Keywords

dentistry; image reconstruction; light interference; measurement errors; moire fringes; optical design techniques; optical fibres; optical projectors; shape measurement; complex shapes contouring; dental elements 3D reconstruction; fiber optics fringe projector design; miniaturized fringe-projector; projection moiré technique; shape errors; shape measurement; tooth reconstruction; triangulation scheme; two points-like sources interference; Dentistry; Optical fibers; Optical interferometry; Residual stresses; Sensitivity; Speckle; Stress measurement; 3D reconstruction; Fringe projection; dental elements; fiber optics; moiré;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics Conference, 2014 Third Mediterranean

Conference_Location

Trani

Type

conf

DOI

10.1109/MePhoCo.2014.6866487

Filename

6866487