Optical design of photometric techniques for specular reflection

Abstract

Photometric techniques are one of the three-dimensional image reconstruction technologies. It is used in various fields, especially surface analysis because it focuses on extracting surface information such as texture and color. Photometric techniques perform the 3D reconstruction using light sources and a camera. If the object has specular reflection properties, then an error may occur in the reconstructed data according to the noise of intensity in acquired images. For the solution of these problems, the optical system is configurated by dome light and coaxial light, and the non-uniformity area is defined and is derived by mathematical formulas in this paper. In order to verify the validity of the formulas, various simulations and experiments have been conducted. As a result, it was confirmed that the proposed optical design method could be used as a new technique for the uniform optical system.