The present paper comprehensively introduced the difference between extruded ceramic filter and foam filter through filtration efficiency, consistent flow rate, good strength, high capacity and costs.
Some papers indicate that using high attenuation rate neutral filter can expand the measuring range of CCD.
多篇文献提出在CCD前加高衰减率的中性滤光片来扩大测温范围。
3
Spectrum equilibrium filter can compensate high frequency absolutely and has high compensation rate, it can improve the resolution of seismic prospecting to a great extent.