Analog-to-digital conversion of information archived in display holograms: I. discussion

Ekaterina V. Rabosh; Nikolay S. Balbekin; Nikolay V. Petrov

doi:10.1364/JOSAA.478498

Journal of the Optical Society of America A
Vol. 40,
Issue 4,
pp. B47-B56
(2023)
•https://doi.org/10.1364/JOSAA.478498

Analog-to-digital conversion of information archived in display holograms: I. discussion

Ekaterina V. Rabosh, Nikolay S. Balbekin, and Nikolay V. Petrov

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Ekaterina V. Rabosh, Nikolay S. Balbekin, and Nikolay V. Petrov, "Analog-to-digital conversion of information archived in display holograms: I. discussion," J. Opt. Soc. Am. A 40, B47-B56 (2023)

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Abstract

This discussion paper highlights the potential of display holograms in the storage of information about objects’ shape. The images recorded and reconstructed from holograms have high visual appeal, and the holographic carrier has far higher information capacity than other storage media. One hindrance to the application of display holograms is the inadequate development of techniques for digitizing information from them, which is compounded by insufficient analysis and discussion of existing approaches. In this review, we provide a historical retrospective of the use of display holography to save comprehensive information on object morphology. We also discuss existing and emerging technologies for converting information into a digital format, addressing one of the most serious challenges to the widespread use of display holography. Potential applications of these technologies are also analyzed.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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	Features	Challenges
	Holographic Image Digitization
	• Vibration insensitive image-based approach.	• Achieving interferometric accuracy.
	Photogrammetric Digitization of Holographic Image Views Reconstructed from Reflection Holograms [20]
	• Ability to use widespread equipment and software;	• Improving Digital 3D models precision and detail;
	• Suitable for large holograms & holographic stereograms;	• Standardize positioning conditions for hologram recording;
	• Cost effective.	• Vignetting during photographing.
	HoloGraphics for Digitization of Distorted Holographic Image Views Reconstructed from Reflection Holograms [61,62]
	• It was developed for combination with computer graphics.	• Efficient coupling between spatial light modulators (SLMs) and analog holograms.
	Digitization of Volumetric Holographic Image by Holographic Topometry [63–70]
	• Digitizes off-axis hologram images.	• Axial digitization of reflection holograms.
	Digital Holographic Digitization
	• Diffraction-limited wavefront-based approach;	• The need for aperture synthesis and data fusion;
	• Interferometric detailing.	• Expanding wavelength-limited phase dynamic range.
	Light-in-Flight Digital Holography [74–76]
	• Extracting shape information from light’s time-of-flight.	• First practical implementation.
	Object Wavefront’s Digitization by Lensless Fourier Synthetic Aperture Digital Holography [71,72]
	• 3D models from digital holograms by numerical reconstruction.	• Minimizing sensitivity to vibrations.
	Microscopic Digitization of the Diffractive Structure of an Off-axis Hologram [73]
	• Using microscopy to digitize diffractive structures;	• Increasing the FOV of the scanning microscope.
	• Efficient way to separate signals in the frequency domain [93].
	Digitized Holography [94–96]
	• Real objects shape digitization for CGH;	• Digitization of the content of analog holograms;
	• Digital processing of real object’s shape data.	• Minimization of a vergence–accommodation conflict.
	Computer Holographic Computations
	• Using numerical calculations to obtain CGH models;	• Obtaining 3D-image quality on par with classic holograms;
	• 3D models: virtual and digitized from real objects.	• Optimizing SLM size and pixel count.
	Holographic Wavefront Printing [77–80]
	• Volumetric holograms recording from CGH models;	• Simplification of methods for diffraction calculation;
	• Exact depth representation.	• Reducing coding noise and wavefront degradation.
	Fringe Printing [81,82]
	• Referenceless thin hologram recording from CGHs models;	• Simplification of methods for diffraction calculation;
	• Allows fabrication of thin transmission holograms.	• Implementation of color selectivity.
	Holographic Stereogram Printing [84,85,87,89,90]
	• Eligible for volumetric hologram recording;	• Encoding the information about object shape;
	• Easy and fast calculations.	• Improvement of depth representation.

Ekaterina V. Rabosh	https://orcid.org/0000-0003-1231-1618
Nikolay S. Balbekin	https://orcid.org/0000-0003-0152-6795
Nikolay V. Petrov	https://orcid.org/0000-0002-8866-7592

Abstract

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Journal of the Optical Society of America A