2.1 Laser SpecklesWhen light falls

2.1 Laser Speckles
When light falls onto an object and the scattered light is
projected onto a screen, the screen is speckled with bright
and dark regions which represents a speckle pattern [11].
A Speckle pattern is a random intensity pattern produced
by the mutual interference of coherent or partially coherent
wavefronts that are subject to phase dierences or intensity

uctuations. At the screen these rays have a dierent op-