这是因为上面这张照片是同一台相机的连续曝光经过数位合成的影像。
The reason for this is because the above image is actually a digital composite of time-consecutive exposures from the same camera.
实验结果表明非连续曝光比连续曝光在相同记录条件下会获得更高的衍射效率。
The experimental result indicated that the diffraction efficiency of a non-continuously exposed grating is higher than that of continuously exposed one in the same recording condition.
合理的风道设计使灯管及玻璃快速冷却，方便连续曝光使用，能大大提高工作效率。
Reasonable duct design to the glass tube and rapid cooling, easy to use continuous exposure, can greatly increase the work efficiency.
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