The effects of DBR reflectivity and well Numbers on threshold current and output power of bottom-emitting VCSELs were analyzed to design an optimal device structure.
分析了腔镜反射率、量子阱数等参数对阈值电流、输出光功率的影响，并根据理论计算对器件参数进行了优化设计。
The new lens, which is thinner at the bottom than at the top, steers light to a viewer's eyes by switching light-emitting diodes along its bottom edge on and off.
这个新镜头，底部比顶部更薄，通过切换镜头底部边缘的发光二极管的开和关，控制进入到观众的眼睛的光线。
The study is for diffusely emitting, diffusely and specularly reflecting inner wall of tube and its bottom black body surface of a fictitious circle burner.
圆管壁为漫发射、漫反射镜反射混合分布，管底部为假想的圆形黑体辐射器。
The contacting area of the electron-emitting layer and the cathode electrode is limited to the periphery except a center part on the bottom face of the hole.
因此，由于电子发射层接收来自位于其侧 面的阴极电极的电子，所以电子主要从电子发射层表面的边缘部发射， 借此提高电子聚焦性能。
The contacting area of the electron-emitting layer and the cathode electrode is limited to the periphery except a center part on the bottom face of the hole.
因此，由于电子发射层接收来自位于其侧 面的阴极电极的电子，所以电子主要从电子发射层表面的边缘部发射， 借此提高电子聚焦性能。
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