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Technology for radiation efficiency measurement of high-power halogen tungsten lamp used in calibration of high-energy laser energy meter

机译：用于高能激光能量计校准的大功率卤素钨灯的辐射效率测量技术

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The calibration method using a high-power halogen tungsten lamp as a calibration source has many advantages such as strong equivalence and high power, so it is very fit for the calibration of high-energy laser energy meters. However, high-power halogen tungsten lamps after power-off still reserve much residual energy and continually radiate energy, which is difficult to be measured. Two measuring systems were found to solve the problems. One system is composed of an integrating sphere and two optical spectrometers, which can accurately characterize the radiative spectra and power-time variation of the halogen tungsten lamp. This measuring system was then calibrated using a normal halogen tungsten lamp made of the same material as the high-power halogen tungsten lamp. In this way, the radiation efficiency of the halogen tungsten lamp after power-off can be quantitatively measured. In the other measuring system, a wide-spectrum power meter was installed far away from the halogen tungsten lamp; thus, the lamp can be regarded as a point light source. The radiation efficiency of residual energy from the halogen tungsten lamp was computed on the basis of geometrical relations. The results show that the halogen tungsten lamp's radiation efficiency was improved with power-on time but did not change under constant power-on time/energy. All the tested halogen tungsten lamps reached 89.3% of radiation efficiency at 50 s after power-on. After power-off, the residual energy in the halogen tungsten lamp gradually dropped to less than 10% of the initial radiation power, and the radiation efficiency changed with time. The final total radiation energy was decided by the halogen tungsten lamp's radiation efficiency, the radiation efficiency of residual energy, and the total power consumption. The measuring uncertainty of total radiation energy was 2.4% (here, the confidence factor is two). (c) 2015 Optical Society of America
机译：使用大功率卤素钨灯作为标定源的标定方法具有等价性强，功率大等优点，非常适合于高能激光能量计的标定。但是，大功率卤素钨灯在断电后仍会保留大量剩余能量，并不断辐射出能量，难以测量。发现了两个测量系统来解决这些问题。一个系统由一个积分球和两个光谱仪组成，它们可以准确地表征卤素钨灯的辐射光谱和功率时间变化。然后使用由与高功率卤素钨灯相同材料制成的普通卤素钨灯校准该测量系统。以此方式，可以定量测量断电后卤素钨灯的辐射效率。在另一个测量系统中，在远离卤素钨灯的地方安装了一个广谱功率计。因此，该灯可以视为点光源。根据几何关系计算了卤素钨灯产生的剩余能量的辐射效率。结果表明，卤素钨灯的辐射效率随通电时间的延长而提高，但在恒定的通电时间/能量下不变。通电后，所有经过测试的卤素钨灯在50 s时均达到辐射效率的89.3％。关闭电源后，卤素钨灯中的残留能量逐渐下降到小于初始辐射功率的10％，辐射效率随时间变化。最终的总辐射能量取决于卤素钨灯的辐射效率，剩余能量的辐射效率以及总功耗。总辐射能量的测量不确定度为2.4％（此处的置信度为2）。 （c）2015年美国眼镜学会

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