发射率（emissivity / emittance）为该波长的一个微小波长间隔内，真实物体的辐射能量与同温下的黑体的辐射能量之比。
n. emissivity
声发射率 acoustic emission rate
光谱发射率 [光] spectral emissivity ; spectral emittance ; emissivity spectral ; emissivity at a specified wavelength
有效发射率 [电子] effective emissivity
海水发射率 emissivity of sea water
每点发射率 Per-Point Emission Rates
辐射发射率 radiant emissivity ; radiation emissivity
二次发射率 secondary emission rate
红外发射率 IR emissivity
全发射率 total emissivity
The fabric emissivity can be reduced distinctly by improving the reflectivity of infrared rays.
提高表面反射能力，可以明显地降低织物的发射率。
参考来源 - 红外迷彩伪装织物研究与实践Dopant influence some properties of polyaniline such as configuration, heat stability, infrared emittance, microwave absorbing.
②掺杂剂性质影响聚苯胺的结构、热稳定性、红外发射率、微波吸收等性能。
参考来源 - 聚苯胺吸波材料的研究The emissivity in 3～5 ? m waveband of the coating was measured by IR-2.
通过IR-2型发射率测量仪器测试了涂层在3～5μm波段的发射率,并分别采用XRD和SEM表征了涂层的物相和微观形貌。
参考来源 - 金属基高发射率涂层耐热性及热震性能研究The developed white HIC reflects 91.46% of near infrared radiation, and the half-sphere emittance of the white HIC is as high as 85%.
研制的白色红外热反射涂层的平均近红外反射比为91.46％，半球发射率85％。
参考来源 - 红外热反射涂料的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
提出了一种新的测量发射率的方法。
A new method of measuring target wideband emissivity is presented.
经实验验证这是一种有效的发射率测量方法。
By experiment, we proved that it is one of efficient method for spectral emissivity measurement.
结果表明，基板选择和薄膜厚度是影响发射率的重要因素。
It showed that the nature of substrate and the thickness of the film were important to the emissivity.
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