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Holographic Display Improvements Poised to Enhance Virtual, Augmented Reality

By SciTechDaily

February 1, 2021

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An approach developed by researchers at NVIDIA and Stanford University can improve image quality and contrast for holographic displays.

The new approach, labeled Michelson holography, uses two phase-only spatial light modulators (SLMs).

Said researcher Jonghyun Kim, "The core idea of Michelson holography is to destructively interfere with the diffracted light of one SLM using the undiffracted light of the other. This allows the undiffracted light to contribute to forming the image rather than creating speckle and other artifacts."

This was combined with a modified camera-in-the-loop (CITL) optimization procedure, which allowed researchers to correct small misalignments of the optical system.

Said Kim, "Once the computer model is trained, it can be used to precisely figure out what a captured image would look like without physically capturing it. This means that the entire optical setup can be simulated in the cloud to perform real-time inference of computationally heavy problems with parallel computing."

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