典型立体目标等效BRDF测试方法

BRDF equivalent test method of typical stereo target

针对现有BRDF测试大多针对平面目标开展,缺乏有效立体目标测试手段,提出了一种典型立体目标等效BRDF测试方法,该方法利用不同反射率涂层的子块,通过不同子块组合成母块,等效相应典型立体目标光散射空间分布,利用BRDF测试系统获取了轴对称圆柱体目标和等效母块的BRDF数据,完成了两者之间测试结果曲线相关性分析。测试结果表明:该测试方法可测量入射角小于30°范围内轴对称立体目标BRDF,完成了小角度入射情况下典型立体目标等效BRDF测试。该方法通过平面目标构型,实现了轴对称立体目标的等效测试。

In view of the existing BRDF tests are for planar targets, not for stereo targets, equivalent test method was proposed for stereo targets BRDF. By combining different reflectivity coating child-blocks into corresponding parent-block, stereo target spatial distribution of light scattering was equivalent. BRDF of axisymmetric cylinder target and its equivalent parent-block were tested by using the BRDF measuring system,and the curve correlation analysis was completed. The test results show that the BRDF equivalent method can measure the axisymmetric stereo targets and equivalent BRDF of stereo targets, when incident angle is small, or less than 30°. BRDF equivalent test method of axisymmetric stereo targets can be realized by founding planar ones.