物表光谱作用机理:光学仿真与实测验证

Mechanism of Spectral Action on Object Surface:Optical Simulation and Experimental Verification

光源光谱与物体光谱反射特性共同决定了视看效果。本文从实际实验测试和Speos光学仿真两个方面验证光谱作用于物表的机理,选择了10种不同光谱的光源及20种不同光谱反射比的Panton色卡(10种色调,每种有高、低饱和度)。将测试和仿真得到的反射谱与理论反射谱进行光谱相似性分析,结果表明,实测反射谱、仿真反射谱及理论反射谱之间的谱型相似性大于0.99。光谱强度分析显示,理论值、仿真值与测量值整体吻合良好,但与蓝、绿色调相关的颜色,在高饱和度时光谱峰值强度存在一定的差异。反射谱色度分析表明色度一致性高。其中,仿真反射谱与理论反射谱色度差接近0,实测反射谱与仿真反射谱及实测反射谱与理论反射谱的色度差(Δu′v′)小于0.045,高饱和度的色度差比低饱和度的高。本文通过实验与软件仿真两方面验证了光谱作用于物表的机理,同时验证了Ansys Speos软件在光谱层面模拟的精准性,为后续基于软件仿真方式开展光谱层面的研究提供支撑。

The light source spectrum and the spectral reflection characteristics of the object jointly determine the viewing effect.In this paper,the mechanism of the spectrum acting on the object surface is verified from two aspects of actual experimental test and Speos optical simulation.Ten different spectral light sources and 20 different spectral reflectance Panton color cards(10 colors,each with high and low saturation)are selected.The spectral similarity analysis between the measured and simulated reflectance spectra and the theoretical reflectance spectra shows that the spectral type similarity between the measured reflectance spectra,the simulated reflectance spectra and the theoretical reflectance spectra is greater than 0.99.The spectral intensity analysis shows that the theoretical value,simulation value and measured value are in good agreement on the whole,but there is a certain difference in spectral peak intensity of colors related to blue and green tones at high saturation.The chromaticity difference between the simulated reflectance spectrum and the theoretical reflectance spectrum is close to 0.The chromaticity analysis of reflection spectrum shows that the chromaticity consistency is high.Among them,the chromaticity difference between the simulated reflection spectrum and the theoretical reflection spectrum is close to 0,and the chromaticity difference between the measured reflection spectrum and the simulated reflection spectrum and the measured reflection spectrum and the theoretical reflection spectrum(Δu′v′)is less than 0.045,and the chromaticity difference of high saturation is higher than that of low saturation.In this paper,the mechanism of the spectrum acting on the surface is verified through experiments and software simulation.At the same time,the accuracy of the Ansys Speos software at the spectral level is verified,providing support for the subsequent research on the spectral level based on software simulation.