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为了研究激光在实际加工表面的散射特性,利用分辨率为10 nW的激光功率计PM100D,波长为1550 nm的激光器和精密转台,自行设计并搭建了半球空间中目标表面散射特性的测量系统.以典型的刨床加工的若干标准粗糙度比较样块为被测目标,在1550 nm红外激光以不同方位照射下,测量了微观具有V形槽结构的不同粗糙度的样块表面的散射功率分布.实验结果转换成双向反射分布函数后,对比分析了入射光方位、入射角和表面粗糙度对此类典型表面散射特性的影响,并分析了特殊散射场形成的原因.结果表明,表面纹理、入射角以及粗糙度均对目标表面的散射特性有规律性影响,这一结果对于具有规律性加工纹理表面的散射特性的研究和建模有一定的参考价值,对激光技术在实际加工表面的应用研究提供了一定的基础.
In order to study the scattering characteristics of the laser on the actual working surface, a measuring system of the target surface scattering in the hemispherical space was designed and built by using a laser power meter PM100D with a resolution of 10 nW, a laser with a wavelength of 1550 nm and a precision turntable. The typical planer processing standard roughness comparison sample is the measured target, and the scattering power distribution of the microscopic surface with different roughness of the V-shaped groove structure is measured under 1550 nm infrared laser irradiation in different azimuths. After the results were transformed into the birefringence distribution function, the influence of incident light azimuth, incident angle and surface roughness on the typical scattering characteristics was analyzed and compared. The reason for the formation of special scattering field was analyzed. The results show that the surface texture, And roughness all have regular influence on the scattering characteristics of the target surface. This result has certain reference value for the research and modeling of the scattering characteristics with regularly processed textured surface. The application of laser technology on the actual machining surface is provided A certain basis.