Lenticular Objects: 3D Printed Objects with Lenticular Lens Surfaces That Can Change their Appearance Depending on the Viewpoint

Zeng, Jiani; Deng, Honghao; Zhu, Yunyi; Wessely, Michael; Kilian, Axel; Mueller, Stefanie

doi:10.1145/3472749.3474815

Cited by 23 publications

(9 citation statements)

References 35 publications

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“…Lenticular sheets are typically made of optical glass, or polymers with high refractive indices such as polycarbonate (PC), acrylic (PMMA), etc. Recently, the use of transparent 3D printable materials [8], [9] has become common especially in prototyping contexts, opening up new possibilities for non-planar integral imaging [10]. Efforts are also being made [11], [12] to create lenticular sheets using deformable, liquid-filled lenses that allow dynamic control of optical properties.…”

Section: A 3d Displaysmentioning

confidence: 99%

Theory and Implementation of Integral Illumination

Takeuchi

Nagamine

2022

IEEE Access

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Integral imaging, i.e., the use of lenticular optics to display stereoscopic/multiscopic images, is now being used in an array of products including glasses-free 3D displays. This paper describes integral illumination, an adaptation of integral imaging where fine-grained control of plenoptic light fields is used to realize new forms of programmable lighting. Relying on a combination of an imaging apparatus and custom lenticular optics, integral illumination devices can produce high-fidelity illusions of real and imagined light sources (e.g., spotlight, chandelier), replicating their illumination effects. Such devices have potential uses as ambient lighting fixtures, photography/videography equipment, components of artistic installations, etc. The paper will provide a general overview of integral illumination, describing its basic principles, hardware configuration, control mechanism, range of capabilities, and theoretical/practical limitations. We will also present a sample implementation of a working integral illumination device, describe its engineering details, report performance measurements, and discuss possibilities for future improvements and extensions.INDEX TERMS Integral illumination, integral imaging, plenoptic light field, programmable lighting.

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Section: A 3d Displaysmentioning

confidence: 99%

Theory and Implementation of Integral Illumination

Takeuchi

Nagamine

2022

IEEE Access

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“…Build orientation can also affect the surface appearance of 3D-printed parts. Manufactured objects can also be designed so that they appear differently from various viewpoints or by using the reflection properties of colors to achieve viewpoint-dependent appearances [27]. A few studies have mentioned the rotary build platform model of MJT technology [27,28] and the liquid jetting at a rotary disk [29].…”

Section: Introductionmentioning

confidence: 99%

“…Manufactured objects can also be designed so that they appear differently from various viewpoints or by using the reflection properties of colors to achieve viewpoint-dependent appearances [27]. A few studies have mentioned the rotary build platform model of MJT technology [27,28] and the liquid jetting at a rotary disk [29]. However, the effect of centrifugal force caused by the rotating build platform on shaping the layers and color quality has yet to be investigated.…”

Section: Introductionmentioning

confidence: 99%

Color appearance in rotational material jetting

Golhin

Sole

Strandlie

2022

Int J Adv Manuf Technol

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Material jetting (MJT) is a recognized additive manufacturing (AM) method to combine various materials and create a wide range of designed appearances. However, the measured color of MJT objects is frequently different from the color provided in the printer software. As a result, estimating the color quality and the measured color attributes of an object before printing is vital for accurate color reproduction. This study investigates the color variation based on the texture in an object 3D-printed using the MJT method on a rotary tray. The novel radial shape of the rotary tray build platform and variation in the layers structure were targeted as the main factors that can increase the uncertainty in accurate color reproduction. The influence of the PolyJet printer setup has been examined by thickness variation of the colored layers, location on the tray (swath selection), ink color, and finish type between layers. Color quality was assessed by comparing the produced object color by calculating spectral and colorimetric differences. Spearman rank correlation coefficient and principal component analysis (PCA) methods were used to analyze the direct or indirect influence of independent categorical factors on the measured color variables. Based on the studied parameters, switching swathes did not fail printer objects for industrial color matching. In contrast, a thickness variation as small as 0.5 mm could cause CIEDE2000 above 5 for most models, resulting in unnatural color reproduction. Color differences in most objects might be discernible to inexperienced observers, depending on the 3D printing parameters.

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“…In this demonstration, we present Lenticular Objects, creating curved 3D objects with lenticular surfaces [8] that look diferent from multiple viewpoints. We demonstrate our 3D editor tool that takes as input the 3D model, the desired viewpoints, and the corresponding color textures and then computes the lens placement and color pattern across the object's surface (Figure 1).…”

Section: Introductionmentioning

confidence: 99%