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FR4 electromagnetic scanner based fourier transform spectrometer

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Fourier transform spectrometers require an interferometric optical setup, where a precisely controlled motion of a mirror on a moving stage and a reference mirror are required. FR4, a common printed circuit board substrate, and the standard PCB technology is used to develop a simple gimbaled scanner structure with high precision to implement into a low-cost and viable Fourier Transform Spectrometer. On top of the corner cube reflector based tilt-insensitive setup, magnetic actuation optimization using twin opposing magnets solution is found to be helpful to enhance interference data. Large Lorentz force is generated for out-ofplane deflection while the torsional motion of the scanner is restricted. ±162.8um out-ofplane translation at 149 Hz resonance is realized with torsion effect deteriorated result which corresponds to <1nm spectral resolution at visible wavelengths.

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ASME

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Electrical electronics engineering

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Proceedings of the ASME Design Engineering Technical Conference

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10.1115/DETC2011-48161

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