从理论和实验上讨论了单腔、双腔窄带干涉滤光片中的光散射现象。结果表明:光散射主要是由干涉滤光片的腔结构引起的。当波长小于滤光片峰值波长的激光束入射到该滤光片上时,在滤光片两侧形成散射光锥,散射光的散射角等于滤光片峰值波长紫移到入射光波长时滤光片所转过的角度。理论计算和实验结果符合得很好。

The scattering behaviors of all-dielectric single-and twin-cavity narrow-band interference filters are studied both in theory and inexperiment. It is shown that the scattering properties are determined mainly by the spacers in which the electric field intensitites are high because of the pressence of high standing-wave fields. The scattered light cones are found in both sides of the filters illuminated by a monochromatic light with shorter wavelength than the peak wavelength of the filter. The scattering angle of each cone is equal to the tilted angle of the filter when the peak wavelength of the filter shifts to that of incident light. The calculations are in good agreement with experimental results.