During tests over several days, the pointer or tracker tracked an IR source and directed a laser beam at that source.
在几天的测试中，指示器或跟踪器跟踪一个红外光源，并引导激光束击中目标。
2
Since most camera flashes emit IR along with their burst of visible light, the one substitution allowed the prototype to transmit and record infrared light.
由于大多数相机闪光灯在发出可见光同时就会发射出红外线，这一替换使得原型机能够发送并记录红外线。
3
Ir is found in high concentrations in some meteorites, in which the solar system's original chemical composition is preserved.