Filter selection is made using inherent spectra. 滤色镜的选择必须利用固有光谱。
A yellow filter is placed in front of the camera lens to assure that no blue light will be imaged. 为了不使蓝光进入相机而成像，可在相机的透镜前加一黄滤色镜。
A satisfactory approximation to monochromatic light can be obtained with a filter placed in front of the arc. 在碳弧前面放一个滤光片就可以得到令人满意的近单色光。
The possibility of designing optical filters using photonic crystals technique was studied in this paper. 对光子晶体技术在滤光片设计中的应用进行了可行性研究。
A filter for a display apparatus, a method of manufacturing the same, and a plasma display apparatus are disclosed. 本发明公开了一种用于显示设备的滤光器及其制造方法，和等离子体显示设备。
The filter funnels the signals received from many directions into separate photodetectors and improves reception by combining the energies of the beams. 滤光器把来自许多方向的讯号导入个别的感光器，并将光束能量合并以改善接收品质。
