“光谱纯度”是天文学专有名词。
在测试仪器中，单色器的光谱纯度决定系统的分辨率。
In test instruments, resolution of the system is dependant on spectral purity of the monochrometer.
电致发光光谱纯度有了很大提高，半峰宽由普通二极管的20纳米降到4纳米以下。
EL purity enhanced from common LED's FWHM about 20 nm decreased to RCLED's FWHM of 3-4 nm.
详细测量了染料激光的性能，如线宽、功率、效率、脉宽、调谐范围、光谱纯度和光束质量等。
The characteristics of the dye laser, such as bandwidth, output power, efficiency, pulse duration, tuning range, spectral purity and frequency stability etc, are measured in details.
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