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

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 hig...

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Bibliographic Details
Main Authors: Christopher, Peter J, Wilkinson, Timothy D
Format: Journal Article
Language:English
Published: 24-08-2020
Subjects:
Physics - Optics
Online Access:Get full text
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Summary: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.
DOI:10.48550/arxiv.2008.11519