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Article Abstract
An equal-intensity beam splitter that utilizes tandem dielectric beam splitters with specific splitting ratios and a high-reflectivity mirror for passive laser speckle reduction is presented. The beam splitter coatings of the dielectric beam splitters were designed using Essential Macleod software simulations; specifically, three laser sub-beams of equal optical intensities were generated. The optical path delay between laser sub-beams destroyed the temporal and spatial coherence of the laser. The objective speckle contrasts decreased from 0.75 to 0.47 when all three laser sub-beams were utilized. The study demonstrates the potential of the equal-intensity beam splitter, which can be designed to be compact and static, for laser projection.
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| http://dx.doi.org/10.1364/AO.554544 | DOI Listing |
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