Optimal full speckle suppression in laser projectors using one 2D Barker code-type optical diffractive elements
نویسندگان
چکیده
The effective method of a speckle suppression using one moving 2D diffractive optical elements based on the periodic Barker code sequence is developed. It was proved that method has the same optical parameters as method based on two 1D Barker code DOE stretched and moving in orthogonal directions. It is shown that DOE movement in special direction allows to use full numerical aperture of objective lens for speckle averaging by angle diversity. It is found that 2D DOE based on Barker code of length of 13 allows to decrease speckle contrast below human eye sensitivity with optical losses less than 10%.
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