Annular cavity optical cavity ring-down technology-based absolute measurement method for forward scattering and backscattering of reflection optical element
The invention relates to a method for measuring forward scattering and backscattering of a high-reflection optical element based on an annular cavity optical cavity ring-down technology. A three-way optical cavity ring-down technology is adopted to synchronously measure optical cavity ring-down sign...
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Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to a method for measuring forward scattering and backscattering of a high-reflection optical element based on an annular cavity optical cavity ring-down technology. A three-way optical cavity ring-down technology is adopted to synchronously measure optical cavity ring-down signals, transmitted by an output cavity mirror, of forward scattering and backscattering of an optical element to be measured within a certain solid angle. And when the ring-down time of the three paths of optical cavity ring-down signals is consistent, the scattering values of the optical element to be measured in the annular cavity in the forward direction and the backward direction within a certain solid angle are calculated through the ratio of the amplitude of the two paths of scattering signals to the amplitude of the transmission signal and the transmissivity of the output cavity mirror. The method can directly measure the real scattering value of the to-be-measured element in the annular cavity when the resona |
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