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Paper detail

Relative limitations of increasing the number of modulation levels in computer generated holography

Phase and amplitude spatial light modulators (SLMs) capable of both binary and multi-level modulation are widely available and offer a wide range of technologies to choose from for holographic applications. While the replay fields generated with multi-level phase-only SLMs are of a significantly higher quality than those generated by equivalent binary phase-only SLMs, evidence is presented in this letter that this improvement is not as marked for amplitude SLMs, where multi-level devices offer only a small benefit over their binary counterparts. Heuristic and numerical justifications for this are discussed and conclusions drawn.

preprint2020arXivOpen access
Peter J. ChristopherTimothy D. Wilkinson
eess.IVphysics.optics
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Open access2 authors2 topics
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Peter J. ChristopherTimothy D. Wilkinson

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