Laser Speckle ·
P(I) = e
−I/⟨I⟩
/⟨I⟩
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.com · coherent light · random phasor sum · why laser looks grainy
Contrast
C = 1
Grain
λL/D
phase
—
Coherent laser beam
Rough scattering surface
Bright speckle (phasors add)
Dark speckle (phasors cancel)
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.com · Laser Speckle