吸收滤光片，含有某种有色金属氧化物的有色玻璃，它对某些波长范围的光具有强烈的吸收能力，透过光则呈单色性。
滤光片几乎要吸收全部能量。
提供了对滤光片和中性玻璃光谱吸收特性的测量结果。
The spectrum absorption characters of the filter and the neutral glass are measured by this method as an example.
考虑到滤光片工作在强光辐照条件下，所以选用的材料必须具有低的吸收和高的抗能量阈值。
The minus filter works under the irradiation of major light, so the materials must have low absorption and high anti-energy threshold.
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