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首页> 外文期刊>Metrologia: International Journal of Scientific Metrology: = Internationale Zeitschrift fur Wissenschaftliche Metrologie: = Journal International de Metrologie Scientifique >Fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres
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Fisheye camera method for spatial non-uniformity corrections in luminous flux measurements with integrating spheres

机译：用于集成球体的光通量测量中的空间非均匀性校正的Fisheye相机方法

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摘要

This paper presents a fisheye camera method for determining spatial non-uniformity corrections in luminous flux measurements with integrating spheres. Using a fisheye camera installed into a port of an integrating sphere, the relative angular intensity distribution of the lamp under test is determined. This angular distribution is used for calculating the spatial non-uniformity correction for the lamp when combined with the spatial responsivity data of the sphere. The method was validated by comparing it to a traditional goniophotometric approach when determining spatial correction factors for 13 LED lamps with different angular spreads. The deviations between the spatial correction factors obtained using the two methods ranged from -0.15% to 0.15%. The mean magnitude of the deviations was 0.06%. For a typical LED lamp, the expanded uncertainty (k = 2) for the spatial non-uniformity correction factor was evaluated to be 0.28%. The fisheye camera method removes the need for goniophotometric measurements in determining spatial non-uniformity corrections, thus resulting in considerable system simplification. Generally, no permanent modifications to existing integrating spheres are required.
机译：本文介绍了一种用于在光通量测量中确定具有整体球体的空间非均匀性校正的鱼眼相机方法。使用安装在集成球的端口中的鱼眼摄像机，确定了灯的相对角度强度分布。当与球体的空间响应数据组合时，该角度分布用于计算灯的空间非均匀性校正。通过将其与传统的Goniophotic方法进行比较来验证该方法，当确定具有不同角度扩展的13个LED灯的空间校正因子时。使用两种方法获得的空间校正因子之间的偏差范围为-0.15％至0.15％。偏差的平均幅度为0.06％。对于典型的LED灯，用于空间非均匀性校正因子的膨胀不确定性（k = 2）被评估为0.28％。 Fisheye摄像机方法在确定空间非均匀性校正时去除对GONIOPOOPORIC测量的需要，从而导致了相当大的系统简化。通常，不需要对现有整合领域的永久修改。

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