13 May 2010 Realistic opto-mechanical simulation and tolerancing of an automotive optical transmitter coupling system
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The advent of Plastic Optical Fibre (POF) opened perspectives for numerous applications in the field of datacommunications. POF is increasingly popular in the automotive industry as a robust, lightweight, electromagnetic interference free, easy and cheap to install alternative to electrical wiring for high-speed entertainment, navigation and data acquisition systems in cars. The main challenge for the introduction of datacommunication systems based on POF is imposed by the working conditions of automotive applications: systems should remain fully functional in a temperature range from -40 °C to +115 °C . Furthermore, standardisation and mechanical design considerations put a number of other boundary conditions. We designed a misalignment-tolerant optical coupling system according to the Media Oriented Systems Transport standard (MOST) to convey the divergent beam from a Resonant Cavity Light Emitting Diode (RCLED) into a Step-Index (SI) multimode POF mounted in a detachable ferrule. In this contribution we describe the methodology to synthesize the dimensions and tolerances on the optical components in the coupling system. A Monte Carlo optimisation algorithm on the full three-dimensional (3D) description of the complete RCLED package and detachable POF ferrule was used to allow a realistic modelling of all misalignments that could occur in the production chain. We select the best suited system according to manufacturing and assembly capabilities as well as its suitability for automotive applications.
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Michael Vervaeke, Michael Vervaeke, Els Moens, Els Moens, Youri Meuret, Youri Meuret, Heidi Ottevaere, Heidi Ottevaere, Carl Van Buggenhout, Carl Van Buggenhout, Piet De Pauw, Piet De Pauw, Hugo Thienpont, Hugo Thienpont, } "Realistic opto-mechanical simulation and tolerancing of an automotive optical transmitter coupling system", Proc. SPIE 7716, Micro-Optics 2010, 77161P (13 May 2010); doi: 10.1117/12.853643; https://doi.org/10.1117/12.853643

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