1 September 1995 Optical position sensor for automatic microassembling operations
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A miniature optical position sensor has been designed, developed, and constructed. It provides fast and contactless measurement of the lateral position of a 0.5-mm-diam cylindrical pin in two directions with an accuracy of ± 3 μm over a range of 1.4 x 1.4 mm2. The sensor consists of an optomechanical measuring head, an optoelectronics circuit, and an interconnection cable including six optical fibers. It has been implemented on a robot arm and applied with success in an automatic microassembly operation.
Andreas Braunschweiler, Pere Llosas, Axel Bertholds, Charles Baur, "Optical position sensor for automatic microassembling operations," Optical Engineering 34(9), (1 September 1995). https://doi.org/10.1117/12.200611

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