光源照射下物体有效反射亮度

Effective Reflection Luminance of Object under Light Source

通过研究不同色温(CT)黑体辐射光源对于暖色物体以及冷色物体作用后的有效反射亮度,以及不同主波长(DW)高斯分布光源对一定主波长物体的有效反射亮度,得到不同光源色温、主波长对于物体有效反射亮度的影响规律,并用于多芯片发光二极管(LED)光谱合成。结果表明,一般情况下,光源色温与物体色温匹配时,相应有效反射亮度更高,而光源主波长与物体主波长相适应时,有效反射亮度也会更高。多芯片LED合成中,相匹配物体主波长芯片能够得到相对更高的有效反射亮度,是提升有效效率的主要因素,同时也要考虑光源光色效果。单芯片纯度高的RGB芯片合成LED对于特定物体色样更容易得到高的亮度反射率,而WRB芯片合成LED,由于白光芯片纯度低,合成LED对于各色样反射率稳定性更好。

The effective reflection luminance of different color temperature （CT） blackbody radiation light sources on warm-toned and cold-toned samples and different dominant wavelength （DW） Gaussian light sources on samples with destined DW are studied. How different CT and DW of light sources work on reflection luminance are obtained. Results show that matched CT of light source and object lead to higher effective reflection luminance, and matched DW of light source and object also lead to higher effective reflection luminance. In multi-chips light emitting diode （LED） spectrum synthesis, matched DW can achieve relatively higher effective reflection luminance and is the key importance of improving effective efficiency, and color appearance of light source should also be taken in consideration. RGB chip LEDs with high purity single chip are more likely to reach high luminivity reflectivity for a designated object. Because of white chip has a low purity, WRB chip LEDs are more stable in luminance reflectivity for all kinds of objects.