Paper
13 September 2010 Effect of projection lens numerical aperture and aberrations on speckle reduction in line-scan laser projectors
Author Affiliations +
Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73871O (2010) https://doi.org/10.1117/12.869422
Event: Speckle 2010, 2010, Florianapolis, Brazil
Abstract
Barker and Barker-like binary phase codes have previously been used for speckle reduction in line-scan laser projectors, and a speckle contrast factor decreased down to 6% has been theoretically achieved assuming ideal imaging conditions. In this article, it is shown by theoretical simulations that the speckle reduction performance of the the binary phase codes is adversely affected by the finite numerical aperture and the aberrations of the projections lens. A minimum numerical aperture of the projection lens is needed to faithfully reproduce the binary phase code placed at an intermediate image plane onto the final display screen. The effects of the cell dimension of the binary phase code are also considerd in simulations.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Nadeem Akram "Effect of projection lens numerical aperture and aberrations on speckle reduction in line-scan laser projectors", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73871O (13 September 2010); https://doi.org/10.1117/12.869422
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Cited by 1 scholarly publication.
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KEYWORDS
Speckle

Binary data

Point spread functions

Projection systems

Line scan image sensors

Eye

Monochromatic aberrations

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