The BG34 filter, for example, reduces the intensity of light at600 nm from a tungsten halogen bulb while transmitting all of the light at the blue and red regions, where detector sensitivity is lower.

• 例如，BG34滤光片可以将钨灯发出的600微米波长的光的强度降低，而让蓝光和红光区域的光通过，探测器在这些区域的灵敏度较低。