A novel extrinsic fiber-optic color-recognition sensor which incorporates three lasers as the light sources, PIN diodes in the receiver and multimode step-index optical fibers as the transmission media is reported. The sensing principle is based on the wavelength dependence of diffuse reflection. The sensor achieves an accuracy of 100% for painted objects, over 73% for clothes and 74% for plastics in recognizing 62 defined colours. It is inherently compact and suitable for remote sensing, has high speed and can function in the presence of normal background illumination.
Fiber-optic color sensor
Proceedings of LEOS'94 ; 1 ; 142-143 vol.1
1994-01-01
203571 byte
Conference paper
Electronic Resource
English
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