4 research outputs found

    White LED Phosphor Performance Tested by Spectro320e Spectrometer

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    我国lEd产业发展非常迅速,稀土钇铝石榴石(yAg)系列荧光粉广泛应用于白光lEd。德国InSTruMEnT SySTEMS公司的SPECTrO320E光谱仪适合光谱的精确测量,文章结合SPECTrO320E和远方公司的PE-5荧光粉激发装置,实现蓝光激发下黄色yAg荧光粉的色品坐标、相对亮度、量子效率等参数精确的测试,研究了仪器在不同的测试条件如暗电流、光电倍增管、密度滤光片等设置的不同,对测试结果的影响,并给出利用本装置测试荧光粉时应该注意的事项。LED industry in china develops rapidly.Yttrium aluminitum garnet(YAG) phosphors are widely applied in white LEDs.The Instrument Systems company's Spectro320e spectrometer is suitable for accurate measurement of the spectrum.It is combined in this paper with the Everfine company's PE-5 phosphor excitation device to achieve the accurate testing of yellow YAG phosphors excited by blue light,such as chromaticity coordinates,relative brightness and quantum efficiency.We also studied the influence of different testing conditions on the results,such as dark current,PMT and density filter.The cautions are provided herewhen using the Spectro320e spectrometer

    橙翅噪鹛的生态观察

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    橙翅噪鹛(Garrulax elliotii)为中国特产鸟类.我们于1990至1991年,在山西历山国家级自然保护区对橙翅噪鹛的生态进行了观察.1993年5至7月又作了补充调查,报道如下

    短翅树莺的生态习性

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    短翅树莺(Gettia diphone)的生态研究较少,19951997年4月至10月,我们在山西历山国家级自然保护区,对短翅树莺的生态进行了观察现报道如下.自然概况及工作方法历山国家级自然保护区(111°51′10″112°36′35″E,35°16′30″35°27′2O″N)位于山西省南部中条山的东段,地处翼城、沁水、阳城、垣曲4县交界,总面积24800hm2.主峰舜王坪海拔232lm.依据短翅树莺的生物学特性,在典型栖息环境中,确立密度调查路线,选定长4km,宽100m的统计路线,以2km/
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