Tucked away in the corner of an optics catalog, Fergus found a special filter that blocks visible light, but not IR or UV.
费格斯在一本塞在某个角落的光学器材目录里发现了一种能阻隔可见光的滤光片。
The left image is taken by replacing the 28mm UV filter with a polarizer.
左边的图像是由偏光片更换过滤器与一个28毫米的紫外线。
Clouds and pollution don't filter out UV rays, and they can give a false sense of protection. This "invisible sun" can cause unexpected sunburn and skin damage.
云和空气污染并不能滤掉紫外线，却能给人带来被保护的幻觉。“看不见的太阳”能引致意外晒伤和皮肤伤害。
With a combined technological process with bag-type filter, continuous UF and UV sterilization was used for water treatment of marine culture with circulation and utilization.
采用袋式过滤、连续超滤和紫外杀菌组合工艺对工厂化海水养殖水进行循环利用处理。
If you have a high-end camera, the lens probably has screw threads, which means you can add a UV or Skylight filter (available at your neighborhood camera shop).
如果你有一架高档相机，那么它的镜头上可能有螺旋纹，这表明你能增加一个紫外或者天窗过滤器(附近的相机店里有售)。
The lens is set to its widest focal length (38mm of the 35mm equivalent) and a polarizer is stacked on top of the 28mm UV filter.
镜头设置为最广泛的焦距(相当于38毫米的35毫米)和偏光是紫外线过滤堆积在上面的28毫米。
The lens is set to its widest focal length (38mm of the 35mm equivalent) and a polarizer is stacked on top of the 28mm UV filter.
镜头设置为最广泛的焦距(相当于38毫米的35毫米)和偏光是紫外线过滤堆积在上面的28毫米。
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