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PowerPhotonic Ltd. - Coherent Beam 4/24 LB
Photonics Dictionary

degree of coherence

A quantitative measurement of the coherence of a light source; equal to the visibility (V) of the fringes of a two-beam interference test:


where Imax equals the intensity at a maximum of the interference pattern and Imin equals the intensity at a minimum. A value greater than 0.88 indicates highly coherent light.
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