论文部分内容阅读
提出了一种基于半球空间光纤阵列的双向反射分布函数(BRDF)测量方法与系统。将多根光纤组成的阵列均匀分布于一半球面上,使球心处物体表面反射的光在三维空间中的角分布转换为同一平面上的二维图像,经CCD采集及相应的数据处理,可实现对物体表面双向反射分布函数的快速测量。同时,利用光纤将照射激光束传输到物体表面待测点,并通过光纤的弯曲角度可改变光束的入射角。利用该测量系统对不同材质、不同加工工艺的物体表面的激光反射分布进行了初步的测量和分析。结果表明,相比传统的扫描式测量系统,该测量系统在提高测量速度的同时,避免了由于光源功率的起伏和探测器响应度的涨落所引起的测量误差,且结构简单,使用方便。
A bi-directional reflection distribution function (BRDF) measurement method and system based on hemispherical spatial fiber array is proposed. The array of multiple optical fibers is uniformly distributed on a hemispherical surface so that the angular distribution of the light reflected by the object surface at the center of the spherical core in the three-dimensional space is converted into a two-dimensional image on the same plane. After being collected by the CCD and corresponding data processing, Realize the rapid measurement of birefringence distribution function on the surface of object. At the same time, the use of optical fiber laser beam will be transmitted to the surface of the object to be measured, and through the optical fiber bending angle can change the incident angle of the light beam. The measurement system was used to measure and analyze the laser reflection distribution of the objects with different materials and different processing technologies. The results show that compared with the traditional scanning measurement system, the measurement system can improve the measurement speed and avoid the measurement error caused by fluctuation of the light source power and detector responsivity, and has the advantages of simple structure and convenient use.