3D computer-generated holography by non-convex optimization

Zhang, Jingzhao; Pégard, Nicolas C.; Zhong, Jingshan; Adesnik, Hillel; Waller, Laura

doi:10.1364/optica.4.001306

Cited by 179 publications

(151 citation statements)

References 24 publications

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“…Since the characteristic timescale of the microbial opsin (or the calibration camera) is much longer than the duration of individual projection masks, the relevant light sculpting pattern is the time-averaged sum of the intensity of several mutually incoherent masks. In addition, the computing speed of masks in 3D-MAP is based on ray tracing and can be calculated much faster than in CGH [19][20] . 3D-MAP is a new method to sculpt light in 3D and enable new real time applications such as mapping neural circuits (see below).…”

Section: Optical Design Of 3d-mapmentioning

confidence: 99%

Three-dimensional Multi-site Random Access Photostimulation (3D-MAP)

Xue

Waller

Adesnik

et al. 2020

Preprint

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AbstractHigh precision optical control of neural ensemble activity is essential for understanding brain function and may ultimately revolutionize the treatment of brain disease. Currently only multiphoton holographic optogenetics achieves the requisite spatial resolution for precise neural network control. However, it suffers from critical drawbacks that limit the number of addressable neurons and prevent the development of implantable or wireless devices. Therefore, achieving high-resolution optogenetic control with one-photon activation is essential to catalyze a dramatic leap in spatiotemporally precise multi-site optogenetic technology for research and clinical use. To overcome this challenge, we developed a new light sculpting technique that can synthesize custom illumination patterns in 3D by rapidly projecting structured illumination patterns along with novel computational methods for precise optogenetic control, termed ‘3D-MAP’, for Three-dimensional Multi-site random Access Photostimulation. This technology enables the optogenetic synthesis of complex spatiotemporal sequences of neural activity in the intact brain. As a one-photon photostimulation technology, 3D-MAP can be widely adopted for custom optogenetic applications by the neuroscience research community, and opens the door to scalable, wireless high precision optical brain interfaces.

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Section: Optical Design Of 3d-mapmentioning

confidence: 99%

Three-dimensional Multi-site Random Access Photostimulation (3D-MAP)

Xue

Waller

Adesnik

et al. 2020

Preprint

Self Cite

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“…Using intensities in the range of~0.1 to 2.0 mW/cm 2 , we produced a large array of geometries ( CAL is a physical implementation of the back-projection algorithm used in CT reconstruction, subject to a positivity constraint in the filtered projections (20,21). Prior work addressing the volumetric 3D lithography problem used holography and field interference to sculpt 3D energy distributions, with compelling results on sparse or highly symmetric geometries (9,22). However, the standard digital holography problem is ill-posed because of the dimensionality mismatch between 3D space and 2D projections (23).…”

mentioning

confidence: 99%

Volumetric additive manufacturing via tomographic reconstruction

Kelly

Bhattacharya

Heidari

et al. 2019

Science

701

606

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Additive manufacturing promises enormous geometrical freedom and the potential to combine materials for complex functions. The speed, geometry, and surface quality limitations of additive processes are linked to their reliance on material layering. We demonstrated concurrent printing of all points within a three-dimensional object by illuminating a rotating volume of photosensitive material with a dynamically evolving light pattern. We printed features as small as 0.3 millimeters in engineering acrylate polymers and printed soft structures with exceptionally smooth surfaces into a gelatin methacrylate hydrogel. Our process enables us to construct components that encase other preexisting solid objects, allowing for multimaterial fabrication. We developed models to describe speed and spatial resolution capabilities and demonstrated printing times of 30 to 120 seconds for diverse centimeter-scale objects.

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“…Generating multiple independent images from a single computer-generated hologram (CGH) is important for many practical applications [3,4]. For instance, the multiple imaging based on the viewing positions or angles is crucial to address the accommodation-convergence conflict in true 3D and near-eye displays [5,6].…”

Section: Introductionmentioning

confidence: 99%

Domain Multiplexed Computer-generated Holography by Embedded Wavevector Filtering Algorithm

Zhang

2020

Preprint

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Computer-generated holography can obtain the wavefront required for constructing arbitrary intensity distributions in space. Currently, speckle noises in holography remain an issue for most computational methods. In addition, there lacks a multiplexing technology by which images from a single hologram and light source can be switched by a lens. In this work, we first come up with a new algorithm to generate holograms to project smoother images by wavevector filtering. Thereupon, we propose a unique multiplexing scheme enabled by a Fourier lens, as the incident light can be decomposed either by a superposition of spherical waves or plane waves. Different images are obtained experimentally in the spatial and wavevector domains, switchable by a lens. The embedded wavevector filtering algorithm provides a new prospective for speckle suppression without the need for postprocessing. The multiplexing technology can double the capacity of current holographic systems and exhibits potential for various interesting display applications.

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3D computer-generated holography by non-convex optimization

Cited by 179 publications

References 24 publications

Three-dimensional Multi-site Random Access Photostimulation (3D-MAP)

Three-dimensional Multi-site Random Access Photostimulation (3D-MAP)

Volumetric additive manufacturing via tomographic reconstruction

Domain Multiplexed Computer-generated Holography by Embedded Wavevector Filtering Algorithm

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