Colorimeter construction of a low cost for use in agricultural product

Jedman Dantas Mota, Alexandre José de Melo Queiroz, Rossana Maria Feitosa de Figueirêdo, Karla dos Santos Melo de Sousa

Abstract


This work aimed to build a low cost colorimeter was constructed, whose operation principle consists of determining a sample reflectance respecting a White Standard and compute the coordinates of L*a*b* color space using the CIE (Comission Internationale d’Eclairage – International Illumination Commission) equations. The equipment was constructed with wood pressed, and operates with 21 LED’s divided into 7 groups according to their color. The sensor has a similar response to the human eye is ideal for applications in photometry. The performance of the instrument was compared to a commercial model CR-10, in which a linear relationship was obtained between the chromaticity coordinates of the two units, with the calibration performed with 60 samples of colored powder.


Keywords


Instrumental analysis, Color, Reflectance

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DOI: https://doi.org/10.14295/cs.v6i3.697

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