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The multitude of uses for lamps in the various steps of the xerographic process are enumerated. Particular emphasis is placed on the use of gas-discharge lamps for exposure, with their requirement of spectral control and adequate radiant power. The characteristics of various types of lamps are considered and the existence of a trouble-some ``power gap' is uncovered. The efficient performance of low-pressure arcs (such as fluorescent and low-pressure sodium lamps) is limited to low powers by electron de-excitation in the presence of self-absorption. On the other hand, high-pressure arc lamps perform efficiently at high powers, but it is difficult to operate these lamps at lower powers in the ``power gap' because of a complex set of interrelated reasons. Lamp designs which may fill this power gap are discussed. The radiant emission from various lamps is considered as well as techniques for manipulating the spectra, particularly the use of metallic halide additives. Overall, a major problem is that commercially available lamps reservice are designed for general illumination purposes while the electrophotographic requirements are different and more demanding. 相似文献
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气体放电灯是一种动态照明器件,允许有较宽的工作电流值。然而,当阴极工作电流过高、阴极处于过热工作状态或者阴极工作电流过小、阴极处于欠热工作状态时,都会造成严重的离子轰击,导致阴极溅射、蒸发加剧,灯寿命缩短。针对现有的阴极特性测量方法的缺点,介绍了一种便捷的放电灯阴极特性测量方法,该方法能较好地确认阴极工作电流是否处于合理的取值范围。 相似文献
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介绍采用镇流器控制器IR2159、功率因数控制器MC3426 2和锁相环MC1 4060B单片IC设计的250W金卤灯可调光电子镇流器电路组成及工作原理. 相似文献
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本文分析了大量采用气体放电灯照明时,三相对称电路和多种典型的不对称电路。拍摄了这些电路的中线电流波形。分析这些波形可知:(1)即使三相负载完全对称,中线电流仍是满载相电流的32.7%。(2)典型的不对称情况下,中线电流大于满载相电流。(3)若出现电路结构变化,中线电流可能大于相电流的两倍。(4)大量采用气体放电灯的三相供电电路的中线电流不仅比相同情况的线性负载的中线电流大,而且高次谐波丰富,是一个 相似文献
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2009年3月,欧盟委员会公布了EuP指令有关高强度气体放电灯的实施措施。本文对该实施措施有关高强度气体放电灯的能效要求进行了介绍,就主要技术指标与我国国标进行比对,同时探讨其对我国高强度气体放电灯企业产生的影响。 相似文献
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介绍了GB19510.13—2007/IEC61347—2—12:2005标准的主要考核项目,对这些主要考核项目设立的原委进行了深入分析,并且对试验方法进行了较详细的介绍。 相似文献
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在已发表的文章《大功率气体放电灯配套工作时的故障剖析》[1]基础上,深入探讨引发故障的潜在因素,客观、理性地阐述应对防范措施及建议,旨在有效地促进光效高、光色好、寿命长的气体放电灯稳定可靠、安全持久地用于照明配套工作. 相似文献