共查询到19条相似文献,搜索用时 125 毫秒
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开发了一种用采脉冲氙灯光源照明,多元阵列光纤作为多通道接收器的光纤型脉冲多通道快速分光颜色测量系统。该仪器的色分辨率高,动态范围大,色品坐标精度为0.002,测量光谱范围为380~780nm,光谱分辨率为10nm,测量时间几个毫秒,测量时间间间隔小于5s。它能测量较暗物体和荧光物体的颜色,也能进行脉冲光源的相对光谱功率分布的测量,并能给出各种标准照明体和各种色度系统下的色度参数。 相似文献
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辽宁省计量仪器实验厂研制成功的“DCM-1型数字式测色计”是利用内部的标准光源照明,用具有特定光谱灵敏度的光电积分元件直接测量物体的反射色和透射色的一种新型的颜色测试仪器,适用于印染纺织 相似文献
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介绍了一种用于物体表面色检测的双光束多通道系统,采用脉冲光源模拟标准D65有,由SPD对颜色进行光谱的平探测,经过精密的光谱定标和光度定标,并结合软件功能,实现了物体色的快速精测量。 相似文献
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面向颜色再现的光谱降维方法研究 总被引:4,自引:3,他引:1
目的为了解决颜色信息光谱反射率的高维数给颜色再现过程带来的诸多问题。方法利用主流的光谱降维方法(主成分分析,Lab PQR,WSPCA,WSPCAplus),实现利于颜色再现的光谱信息筛选,从光谱精度、色度精度及变光源色差稳定性等3个方面评价这些降维方法。结果实验证明,主成分分析(PCA)法的光谱精度最高,光谱误差只有0.0076,但是在色度精度及变光源色差稳定性方面表现不好;Lab PQR法在光谱精度和色度精度间达到了很好的平衡,但是当变换光源时,其色差稳定性较差;WSPCA法去除了光源的影响,其变光源后色差变化不大,并且同时兼顾了色度精度,但以牺牲光谱精度为代价,WSPCAplus在其基础上将光谱精度提高为0.0081。结论研究结果对颜色再现过程中降维方法的选择具有一定的指导作用。 相似文献
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高白纸张的颜色色差的控制是一项既有一定难度又非常关键的工序.质量标准要求高白纸张的色彩差别要在较长时间内保持一致,不能有显著差别,要在生产工艺中加以控制.但颜色差别实际偏离多少、如何调整是个难题.使用色度白度仪可以帮助我们找出偏离量,指明方向,以达到颜色控制的目的。目前,许多中小企业颜色指标仍然靠目视测量、定性评价。颜色的测量技术比较落后。因此。如何有效地使用色度仪器及应用标准纸样来校准仪器也成为多数生产高白染色纸企业共同关心的问题。[第一段] 相似文献
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本文主要介绍了GM960A型三相多功能动态电参量图形表的基本原理及特点,GM960A型仪表系统集数字信号处理技术和现代计算机技术于一身的新一代电参量综合测量仪表,它既可实地在线准确测量三相非正弦电参量(电压,电流及功率等)又可现场观察,存储和输出电压,电流及功率波形,尤其是在实时瞬态功率波形显示功能是该表的特色之一,在一些传统仪表无法测量的场合(如变频调速系统电参量的测量),GM960A的测量功能 相似文献
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Methods of reducing the errors in measuring the chromaticity coordinates of objects using a three-channel photoelectric colorimeter
and automatic recognition of the type of light source, with an appropriate zonal correction of the colorimeter readings, are
considered. It is shown that the proposed methods enable the error in measuring the chromaticity coordinates of light sources
to be reduced several-fold.
Translated from Izmeritel'naya Tekhnika, No. 1, pp. 48–51, January, 1997. 相似文献
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便携式高精度土壤养分光电比色仪研究 总被引:5,自引:0,他引:5
介绍了一种便携式高精度土壤养分光电比色仪的结构、工作原理和实现方法。土壤养分光电比色仪与一般实验室用仪器不同,它除了完成光电比色浓度测量之外,还内置了温度传感器以便进行温度校正,从而提高对环境的适应性。实测数据表明便携式高精度土壤养分光电比色仪的性能指标达到和超过了国家有关标准,它体积小、重量轻和操作简单,将会在我国农村基层测土施肥中得到广泛应用。 相似文献
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V. A. Solov’ev 《Measurement Techniques》2005,48(5):461-465
A method of measuring the relative spectral sensitivity of measurement channels X, Y, and Z of an integral colorimeter is considered. A method of establishing the error of an integral colorimeter over the entire color field of a color chart is proposed on the basis of the optimal integral characteristics of hypothetical light filters and the results of measurements of the relative spectral sensitivity.__________Translated from Izmeritel’naya Tekhnika, No. 5, pp. 31–34, May, 2005. 相似文献
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《Journal of Modern Optics》2013,60(10):725-732
A photoelectric colorimeter utilizing fibre optics in the illumination of the sample and the collection of light, is described. At this stage, the instrument is a differential one, but the design offers enough degrees of freedom to correct its response to a very close approximation to the C.I.E. colour matching functions. Repeated measurements over a period of time have shown a high degree of sensitivity and reproducibility. By using the fibre optics it is possible to measure remotely the colour of any surface, or a liquid in bulk. It has been tried with success for controlling a bath coloration process. 相似文献
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Abstract: We present a compact, portable, and mechanically robust instrument for measuring optical wavelength based on an arrangement of four Wollaston prisms that forms spatially localised fringes in a plane perpendicular to the optic axis. The wavelength is determined from the fringe period. After calibration, the instrument had an accuracy of c. 1 of 106 , and was immune to fluctuations in output intensity of a light source of up to 10 dB. 相似文献
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James L. Gardner 《Journal of research of the National Institute of Standards and Technology》2007,112(3):129-138
Uncertainties in source color measurements with a tristimulus colorimeter are estimated for calibration factors determined, based on a known source spectral distribution or on accurate measurements of the spectral responsivities of the colorimeter channels. Application is to the National Institute of Standards and Technology (NIST) colorimeter and an International Commission on Illumination (CIE) Illuminant A calibration. Detector-based calibration factors generally have lower uncertainties than source-based calibration factors. Uncertainties are also estimated for calculations of spectral mismatch factors. Where both spectral responsivities of the colorimeter channels and the spectral power distributions of the calibration and test sources are known, uncertainties are lowest if the colorimeter calibration factors are recalculated for the test source; this process also avoids correlations between the CIE Source A calibration factors and the spectral mismatch factors. 相似文献