Decorrelation object

Instant averaging

Sequential averaging

Temporal coherence

Broadband light source;

Many light sources of different wavelengths

Dynamic wavelength variation (e.g. tunable laser)

Spatial coherence

Using a spatially expanded light source;

Dividing a light source into spatially incoherent sub-sources by breaking temporal coherence;

Simultaneous illumination of different areas of the object with several incoherent light sources

Movement (scanning) of a coherent light spot

Wave field direction

Simultaneous illumination with multiple light sources of different directions

Dynamic changing the angular spectrum

Polarization

Splitting a light source into two temporary incoherent tracks with linear polarization changes

Dynamic changing the state of polarization

Phase front

Dynamic diffuser;

Vibrating multimode fiber