High-quality full-parallax full-color three-dimensional image reconstructed by stacking large-scale computer-generated volume holograms

Kunieda, Orie; Matsushima, Kyoji

doi:10.1364/ao.58.00g104

Cited by 22 publications

(15 citation statements)

References 23 publications

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“…Moreover, the WLED packages these articles concentrated on is the single-chip one. In other words, their results did not really work with high CCT multi-chip white LEDs [21][22][23].…”

Section: Introductionmentioning

confidence: 86%

Enhancement of luminous flux and color quality of white light-emitting diodes by using green (Y,Gd)BO3:Tb3+ phosphor

2021

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In the study, we analyzed and clarified the effect of green (Y,Gd)BO3:Tb 3+ phosphor on chromatic homogeneity and optical performance of multi-chip white LEDs (MCW-LED). Thereby there is a solution to get the best luminous efficiency. In addition, (Y,Gd)BO3:Tb 3+ is known as one of the factors that has a significant impact on lighting performance, so it needs to add the (Y,Gd)BO3:Tb 3+ phosphor in the structure of LEDs to combine with the yellow phosphor YAG:Ce 3+ to receive the best results. Therefore, the concentration and size of (Y,Gd)BO3:Tb 3+ should be choose carefully so that the presentation of MCW-LEDs would be more incredible. The results show that when the concentration of green-emitting (Y,Gd)BO3:Tb 3+ phosphor tends to increase, it also helps the color homogeneity and the lumen efficiency of MCW-LEDs with the average correlated color temperature (CCT) of 5600 K-8500 K become better.

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“…Moreover, the WLED packages these articles concentrated on is the single-chip one. In other words, their results did not really work with high CCT multi-chip white LEDs [21][22][23].…”

Section: Introductionmentioning

confidence: 86%

Enhancement of luminous flux and color quality of white light-emitting diodes by using green (Y,Gd)BO3:Tb3+ phosphor

2021

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“…High-resolution holograms such as rainbow holograms and Fresnel holograms are applicable for 3D advertising and packaging because of the emergence of holographic printing technology [9][10][11][12][13][14]. The biggest challenge for high-resolution holography is the huge amount of computation.…”

Section: Introductionmentioning

confidence: 99%

High-Resolution Hologram Calculation Method Based on Light Field Image Rendering

Yang

Zhang

et al. 2020

Applied Sciences

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A fast calculation method for a full parallax high-resolution hologram is proposed based on elemental light field image (EI) rendering. A 3D object located near the holographic plane is firstly rendered as multiple EIs with a pinhole array. Each EI is interpolated and multiplied by a divergent sphere wave and interfered with a reference wave to form a hogel. Parallel acceleration is used to calculate the high-resolution hologram because the calculation of each hogel is independent. A high-resolution hologram with the resolution of 200,000 × 200,000 pixels is calculated within only eight minutes. Full parallax high-resolution 3D displays are realized by optical reconstructions.

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“…Due to the efficiency in lighting and energy-saving, the diodes with light radiating ability called LEDs has soon recognized as potential lighting method. The applications of LEDs are spread out in many different fields from general usage of street lighting, back-lighting to more advanced utilization in medical and automobile [1][2][3]. To produce white light, the most common approach is to apply the combination of chromatic lights which yielded from the blue LED chip and the phosphor that ejects light downward.…”

Section: Introductionmentioning

confidence: 99%

Enhance the chromatic uniformity and luminous efficiency of WLEDs with triple-layer remote phosphor structures

Loan

2020

IJECE

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The angular color uniformity (ACU) with the ability to evaluate chromatic performance of WLED has become an important target to achieve in producing higher-quality WLEDs. This paper studies the ACU enhancing effects of novel triple-phosphor configuration in lighting devices with remote phosphor structure. Moreover, the optical influences of remote phosphor structure with three phosphor layers (TL) on WLEDs properties are calculated and compared to the dual-layer (DL) one for reference. The experiments are applied to devices at 5 distinct correlated color temperature ranging from 5600-8500 K. The results presented that DL structure attains better color rendering index (CRI) than the TL one. Meanwhile, in terms of color quality scales (CQS), TL model shows higher values at all ACCTs, compared to the DL. Moreover, the luminous flux of DL configuration is lower than that of TL structure. In addition, the diversion of color temperature depicts as D-CCT in TL structure is much better than the value in DL structure, especially at high ACCT as 8500 K, which means TL is good for chromatic uniformity of high ACCTs WLEDs. These results proved that the triple-layer structure is superior and more effective to apply for acquiring the enhancement of WLEDs package.

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High-quality full-parallax full-color three-dimensional image reconstructed by stacking large-scale computer-generated volume holograms

Cited by 22 publications

References 23 publications

Enhancement of luminous flux and color quality of white light-emitting diodes by using green (Y,Gd)BO3:Tb3+ phosphor

Enhancement of luminous flux and color quality of white light-emitting diodes by using green (Y,Gd)BO3:Tb3+ phosphor

High-Resolution Hologram Calculation Method Based on Light Field Image Rendering

Enhance the chromatic uniformity and luminous efficiency of WLEDs with triple-layer remote phosphor structures

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