Abstract
This paper focuses on the theoretical analyzation of laser speckle
reduction by utilizing a microlens array (MLA). A theoretical model
was established to describe the screen effect on speckle reduction,
taking into account MLA cell size and on-screen projection/detection
resolution area size. The relationship between the speckle contrast
ratio (SCR) of a projection system and the cell size of an MLA was
studied and investigated. A guideline for choosing an MLA that is able
to suppress SCR below the threshold of human perception is proposed
from the obtained results.
© 2017 Optical Society of
America
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