在许多情形下，会用到红外线滤镜，这可以将红外光传入到相机。
In most cases, an infrared filter is used which lets the infrared light to pass through to the camera.
蓝色，可见光和红外线加上一个滤镜分离氢排放。
Blue, visible and infrared filters were combined with a filter that isolates hydrogen emission.
蓝色，可见光和红外线加上一个滤镜分离氢排放。
Blue, visible and infrared filters were combined with a filter that isolates hydrogen emission.
应用推荐