Image Plane Holography

Brandt, Gerald B.

doi:10.1364/ao.8.001421

Cited by 72 publications

(16 citation statements)

References 15 publications

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“…[31] In other words, it implies that SIHs hologram will accept a broadband of wavelength from each speckle image point without triggering any spectral distortion even when the SIHs is illuminated with white point light source. In this scenario, the object plane coincides with the hologram plane (z i = 0), so that the image blur goes to zero too.…”

Section: Design and Fabrication Of Sihsmentioning

confidence: 99%

“…Furthermore, a similar result holds for an extended reference beam hologram reconstructed with a point source. [31] In other words, it implies that SIHs hologram will accept a broadband of wavelength from each speckle image point without triggering any spectral distortion even when the SIHs is illuminated with white point light source.…”

Section: Design and Fabrication Of Sihsmentioning

confidence: 99%

See 1 more Smart Citation

Tunable Broadband Wavefronts Shaping via Chaotic Speckle Image Holography Carrier Fringes

Zhou

Zhu

Zhou

et al. 2016

Advanced Optical Materials

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nanostructured interferogram holography metasurfaces, which is among the various metasurfaces, can govern light in its propagation by surface waves or freespace waves and generate desired arbitrary optical images, [5,6] leading to various applications such as multilevel optical switching, [7] beam shaping, [8] plasmonic lens, [9] optical vortex beams detector, [10] laser tweezers, [11] data storage, [12] 3D holographic displays, [13,14] and high polarization conversion efficiency. [15] Therefore, these new types of holography metasurfaces have offered attractive functionalities for developing new types of optoelectronic devices. However, the holography metasurfaces are constrained by sophisticated design and fabrication procedures and are less compatible with dynamic functionalities as well as unequal across the electromagnetic spectrum. [16] Consequently, the creation of new optical holography metasurfaces that can be adjusted at will and integrated into optoelectronic systems would help to bridge the chasm between our macroscopic world and application based on this fascinating emerging field of microscopic systems.Nowadays, interest in the application of white organic lightemitting diodes (WOLEDs) for solid-state lighting and flat-panel display backlightings has been steadily increasing. [17][18][19] The maximum scientific reported power efficiency (PE) of WOLEDs has exceeded 100 lm W −1 beyond fluorescent tude efficiency for both rigid and flexible devices. [20][21][22] However, it is difficult for WOLEDs to compete in fields where concentrated or collimated ultrahigh luminous flux is needed. For example, they cannot operate in car headlights, general lighting retrofit bulbsor or flashlights. [23] Additionally, the intrinsically large-area light emitting characteristic limits the effectiveness of them in the luminance enhancment of liquid crystal displays (LCDs) as backlighting sources. [24] Therefore, tailoring broadband directive emission profile for WOLEDs by wavefronts shaping technology is extremely appealing and scientifically curious for aforementioned specific applications.Similarly, wavefronts shaping has also been attractive research direction for optical diffusers, which are widely used in the optical industry for distributing or spreading the light intensity. [25] One of the most common applications of optical diffusers is the backlighting system of the LCDs. Nevertheless, an additional prism sheet is usually added to limit the scattering angle of the light beams due to the poor light steeringThe advent of holography metasurfaces unlocks a plethora of exciting opportunities for rapid progress at the frontiers of various branches of science and engineering. However, the holography metasurfaces are constrained by sophisticated design and fabrication procedures and are less compatible with dynamic functionalities as well as unequal across the electromagnetic spectrum. Here, a new approach is proposed to fabricate speckle image holography metasurfaces with chaotic carrier fringes for broadband photon m...

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Section: Design and Fabrication Of Sihsmentioning

confidence: 99%

Section: Design and Fabrication Of Sihsmentioning

confidence: 99%

Tunable Broadband Wavefronts Shaping via Chaotic Speckle Image Holography Carrier Fringes

Zhou

Zhu

Zhou

et al. 2016

Advanced Optical Materials

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“…To demonstrate SPAR algorithm in off-axis holography concept we will use the so-called image-plane holography, [59][60][61] where the object image is reconstructed at the sensor plane. In contrast to the conventional image plane holography typically using a single lens to transfer image to the registration plane, we use a bitelecentric 4f system with two lenses instead, because the scheme with a single lens leads to a quadratic phase factor.…”

Section: Off-axis Sparse Wavefront Reconstructionmentioning

confidence: 99%

Sparse approximations of phase and amplitude for wave field reconstruction from noisy data

et al. 2015

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The topic of sparse representations (SR) of images has attracted tremendous interest from the research community in the last ten years. This interest stems from the fundamental role that the low dimensional models play in many signal and image processing areas, i.e., real world images can be well approximated by a linear combination of a small number of atoms (i.e., patches of images) taken from a large frame, often termed dictionary. The principal point is that these large dictionaries as well as the elements of these dictionaries taken for approximation are not known in advance and should be taken from given noisy observations. The sparse phase and amplitude reconstruction (SPAR) algorithm has been developed for monochromatic coherent wave field reconstruction, for phase-shifting interferometry and holography. In this paper the SPAR technique is extended to off-axis holography. Pragmatically, SPAR representations are result in design of efficient data-adaptive filters. We develop and study the algorithm where these filters are applied for denoising of phase and amplitude in object and sensor planes. This algorithm is iterative and developed as a maximum likelihood optimal solution provided that the noise in intensity measurements is Gaussian. The multiple simulation and real data experiments demonstrate the advance performance of the new technique.

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“…The deviation from perfect linearity over a depth modulation of three half waves of wavelength, X = 0.4416 urn was unmeasurable. This condition was met by exposing for the time required to reach the above depth of 0.664 ^ when developed for 29 [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] seconds in 4:1 developer at 20° C using ultrasonic agitation in the developer tank. The significance of the indicated depth is that 100% modulation of the refracted light by the grating takes place for a depth of \/2 in reflection mode (and X in the transmission mode assuming refractive index of the medium to be 1.5).…”

Section: -21mentioning

confidence: 99%

“…Two hologram forms 4-2 10 Redundancy effect 4- 6 11 Screen contrast as a function of screen reflectivity for various K values 4-9 12 Viewing system configuration schematic 4-12 13 Viewing geometry 4-14 14 Viewing screen, exploded view 4-15 15 Viewing screen ray trace -transmission 4-16 16 Viewing screen ray trace -reflection 4-17 17 Color coverage 4-19 18 Color separation plate densities 4-20 19 Tone reproduction cycle 4-22 20 Photoresist and dichromated gelatin sensitivity as a function of wavelength 4-31 21…”

mentioning

confidence: 99%