原创：基于Spectro320e光谱仪的白光LED荧光粉性能测试 - 科技论文发表 - xzbu.com 中国论文网 关键词： 荧光粉；暗电流；光电倍增管；密度滤波片 [gap=998]Keywords: phosphor; dark current; PMT; density filter
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Neutral density filter 中灰密度滤光镜 ; [光] 中性密度滤光片 ; 减光镜 ; [摄] 中性灰滤光片
variable density filter 可变密度滤光器 ; 可变密度滤光片
High-density filter 高密度过滤装置
gradient neutral density filter 陡度中性密滤光片 ; 梯度边增强
fixed neutral density filter 固定中密度滤光器
flash photographic density filter 闪光照相密度滤器 ; 闪光昦曝光表
High-density filter bag 高密度过滤布袋
graduated neutral-density filter 渐变中灰密度滤光镜
graded neutral density filter 分级中性滤光片
A graduated neutral density filter will also help you make sure the sky isn't overexposed.
累进中性密度滤镜将保证你照片里的天空不会曝光过度。
Polyester, polypropylene, high density vinylon filter cloth is widely used in the pharmaceutical, chemicals, dyes, smelting, cement, mining and other enterprises in production.
涤纶、丙纶、维纶等高密度过滤布则广泛应用于制药、化工、染料、冶炼、水泥、矿山等企业生产中。
In the new algorithm, a bank of Gauss-Hermite filter (GHF) is used for generating the importance density function.
在滤波算法中，我们用一簇高斯厄米特滤波器(GHF)来产生重要性概率密度函数。
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