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Christiansen filter

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Christiansen filter

[′kris·chən·sən ′fil·tər]
(optics)
A type of color filter, a solid-in-liquid suspension, which scatters all incident energy except that of a narrow frequency range out of the direct beam. Also known as band-pass filter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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There are many techniques such as Christiansen filter, gravity refractometer, mirror reflection, prism reflection, pendellosung oscillation etc.
High-precision determination of the neutron coherent scattering length
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