极大的射电流量同极小的角经集于一身，意味着这些发射源有难以置信的高表面亮度。
The combination of very large radio flux and exceedingly small angular size means that the sources have a fantastic surface brightness.
详述了近贴聚焦二极管像增强器与低亮度矩阵el显示屏耦合，用光电阴极代替场发射电子，开发出一种新型显示器。
With the proximity focused diode image intensifier coupled to a low luminance el display, and a photocathode instead of a field-emitter, a new photocathode display is developed.
并讨论由此而导致的开启电场的变化、场发射电流密度的变化以及亮度和稳定性的变化。
Finally we discuss the differences of turn-on voltage, field emission current density and the stability of field emission display because the differences of the cathode of field emission.
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