Computer-generated double-phase holograms

Hsueh, Chia-Wei; Sawchuk, Alexander A.

doi:10.1364/ao.17.003874

Cited by 196 publications

(77 citation statements)

References 14 publications

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“…SLMs allow full spatial control over the phase directly, but amplitude control must be achieved indirectly. For instance one can use two SLMs in series to create any arbitrary field by exploiting polarisation optics to convert phase to amplitude information [11,12] and there are more advanced techniques, which can manipulate the amplitude and phase with only a single phase-only SLM [13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Comparison of beam generation techniques using a phase only spatial light modulator

Clark¹,

Offer²,

Franke‐Arnold³

et al. 2016

Opt. Express

128

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Abstract:Whether in art or for QR codes, images have proven to be both powerful and efficient carriers of information. Spatial light modulators allow an unprecedented level of control over the generation of optical fields by using digital holograms. There is no unique way of obtaining a desired light pattern however, leaving many competing methods for hologram generation. In this paper, we test six hologram generation techniques in the creation of a variety of modes as well as a photographic image: rating the methods according to obtained mode quality and power. All techniques compensate for a non-uniform mode profile of the input laser and incorporate amplitude scaling. We find that all methods perform well and stress the importance of appropriate spatial filtering. We expect these results to be of interest to those working in the contexts of microscopy, optical trapping or quantum image creation.

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Section: Introductionmentioning

confidence: 99%

Comparison of beam generation techniques using a phase only spatial light modulator

Clark¹,

Offer²,

Franke‐Arnold³

et al. 2016

Opt. Express

128

View full text Add to dashboard Cite

show abstract

“…Every uctuation that can in uence phase shift will cause a speckle or the distorted image, such like the uctuation of driving voltage, cell gap variation, and every thickness variation of each lm [28,29,[31][32][33]. The fabrication requirements of holographic display is more precise than commercial LCDs.…”

Section: Light Sourcementioning

confidence: 99%

Augmented reality using holographic display

Lin¹,

Wu²

2017

Optical Data Processing and Storage

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Augmented reality (AR) provided extra information to the user by applying virtual image onto the real environment. There are many methods achieving AR. Holographic display is one of the potential ways due to its perfect 3D demonstration. Holographic display can provide the virtual 3D object with depth information. It can be realized an AR device with real 3D scene by combing holographic display. However, it is di cult to realize a compact holographic display with wide viewing angle and enough resolution. It limits holographic display to apply to AR. In this paper, we will discuss the requirements of holographic display based on the development of LCD, including resolution (ppi), viewing angle, image quality and backlight. We wish this article can provide preliminary direction for the LCD industry to develop AR technology using holographic display.

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“…A straightforward solution to this problem, is to employ two spatial light modulators (SLMs) to display the real and imaginary components, or the amplitude and phase information, of a complex hologram [3][4][5]. Likewise, a complex hologram can be simulated with a double phase-only hologram [6], and displayed with a pair of phase-only SLMs. In some implementation, the pair of SLMs is replaced by a single device, displaying a pair of holograms and subsequently merging the reconstructed wavefront through a grating [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Novel method for converting digital Fresnel hologram to phase-only hologram based on bidirectional error diffusion

Tsang¹,

Poon²

2013

Opt. Express

143

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Abstract:We report a novel and fast method for converting a digital, complex Fresnel hologram into a phase-only hologram. Briefly, the pixels in the complex hologram are scanned sequentially in a row by row manner. The odd and even rows are scanned from opposite directions, constituting to a bidirectional error diffusion process. The magnitude of each visited pixel is forced to be a constant value, while preserving the exact phase value. The resulting error is diffused to the neighboring pixels that have not been visited before. The resulting novel phase-only hologram is called the bidirectional error diffusion (BERD) hologram. The reconstructed image from the BERD hologram exhibits high fidelity as compared with those obtained with the original complex hologram.

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Computer-generated double-phase holograms

Cited by 196 publications

References 14 publications

Comparison of beam generation techniques using a phase only spatial light modulator

Comparison of beam generation techniques using a phase only spatial light modulator

Augmented reality using holographic display

Novel method for converting digital Fresnel hologram to phase-only hologram based on bidirectional error diffusion

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