Reflectance Spectrum Analysis Method And Based On This Method Optical Fiber Colour Sensor For In-Process Colour Recognition

Elzbieta Marszalec

doi:10.1117/12.949349

10 March 1989 Reflectance Spectrum Analysis Method And Based On This Method Optical Fiber Colour Sensor For In-Process Colour Recognition

Elzbieta Marszalec

Author Affiliations +

Proceedings Volume 1012, In-Process Optical Measurements; (1989) https://doi.org/10.1117/12.949349
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

Under the conditions of many manufacturing processes the measurement and recognition of colours constitute an important task. The paper presents a reflectance spectrum analysis method for in-process colour recognition. In this method the reflectance spectra are analysed at different wavelengths by means of a set of narrow-band optical filters. The method constituted a basis for the development of an optical fiber colour sensor. The sensor necessitated an elaboration of a special method for selecting narrow-band optical filters. Thanks to this method the sensor has acquired good accuracy in colour recognition and can differentiate objects of very similar colours. The main advantages of the presented colour sensor include: the use of the whole spectrum instead of three coordinates, the speed of colour recognition, and the accuracy of colour recognition. Thanks to the application of optical fibers, the sensor head has small dimensions and a special construction which allows it to recognize objects of different degrees of glossiness. The second part of the paper describes a prototype of the optical fiber colour sensor and an experimental examination of the sensor. An example of an application of the sensor in robotics in recognizing and sorting coloured objects is also briefly presented.

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Elzbieta Marszalec "Reflectance Spectrum Analysis Method And Based On This Method Optical Fiber Colour Sensor For In-Process Colour Recognition", Proc. SPIE 1012, In-Process Optical Measurements, (10 March 1989); https://doi.org/10.1117/12.949349

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