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.

光度技术是三维图像重建技术之一。它被用于各个领域，尤其是表面分析，因为它专注于提取表面信息，例如纹理和颜色。光度技术使用光源和相机执行 3D 重建。如果物体具有镜面反射特性，则根据采集图像中强度的噪声，重建数据可能会出现误差。为了解决这些问题，本文采用顶光和同轴光配置光学系统，定义非均匀区域，并通过数学公式推导出来。为了验证公式的有效性，进行了各种模拟和实验。其结果，