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- W2023598816 abstract "Authors propose a new approach in displacement measurements based on Gaussian beam propagation, their focusing properties andtheir spatial modulation. Two modulated Gaussian beams with a phase shift of 180° are focused on a slit fixed to the moveable object.The resulting laser beams at the slit output are focused into a multimode fiber. A lock-in amplifier demodulates the photodiode signalplaced at the multimode fiber output. The lock in-amplifier output signal is a function of the slit displacement. The sensor iscompletely fibered with no electrical wires so it presents no heat dissipation near the moveable object and is compatible with vacuumuse. It is a contactless sensor and provides a simple compact design and cost-effective means of achieving high resolution absolutedisplacement measurements. The preliminary experimental data of the sensor calibration by laser interferometry have shown aresolution of 0.1 nm." @default.
- W2023598816 created "2016-06-24" @default.
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- W2023598816 date "2007-05-04" @default.
- W2023598816 modified "2023-09-23" @default.
- W2023598816 title "Absolute position sensor using Gaussian beam propagation properties and their spatial modulation" @default.
- W2023598816 doi "https://doi.org/10.1117/12.723033" @default.
- W2023598816 hasPublicationYear "2007" @default.
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