3D Printing of Optics Based on Conventional Printing Technologies

Rank, Manuel; Sigel, Andre; Bauckhage, Yannick; Suresh-Nair, Sangeetha; Dohmen, Mike; Eder, Christian; Berge, Christian; Heinrich, Andreas

doi:10.1007/978-3-030-58960-8_3

Cited by 6 publications

(6 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DLP printing technology offers high resolution, which can create very fine details and intricate geometries with precision. [ 53 ] Moreover, it produces very little distortion or warping of the printed parts, as the layers are cured quickly and evenly.…”

Section: Resultsmentioning

confidence: 99%

Additive Manufacturing of Transparent Multi‐Component Nanoporous Glasses

Li,

Cooperstein

et al. 2023

Advanced Science

View full text Add to dashboard Cite

Fabrication of glass with complex geocd the low resolution of particle‐based or fused glass technologies. Herein, a high‐resolution 3D printing of transparent nanoporous glass is presented, by the combination of transparent photo‐curable sol–gel printing compositions and digital light processing (DLP) technology. Multi‐component glass, including binary (Al2O3‐SiO2), ternary (ZnO‐Al2O3‐SiO2, TiO2‐Al2O3‐SiO2), and quaternary oxide (CaO‐P2O5‐Al2O3‐SiO2) nanoporous glass objects with complex shapes, high spatial resolutions, and multi‐oxide chemical compositions are fabricated, by DLP printing and subsequent sintering process. The uniform nanopores of Al2O3‐SiO2‐based nanoporous glasses with the diameter (≈6.04 nm), which is much smaller than the visible light wavelength, result in high transmittance (>95%) at the visible range. The high surface area of printed glass objectives allows post‐functionalization via the adsorption of functional guest molecules. The photoluminescence and hydrophobic modification of 3D printed glass objectives are successfully demonstrated. This work extends the scope of 3D printing to transparent nanoporous glasses with complex geometry and facile functionalization, making them available for a wide range of applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Additive Manufacturing of Transparent Multi‐Component Nanoporous Glasses

Li,

Cooperstein

et al. 2023

Advanced Science

View full text Add to dashboard Cite

show abstract

“…Modified DLP printers have been developed to enable automated material change. These printers achieve the change in material by either using an array of vats, ,, or with partitioned material sections within a single vat, , or by pumping mechanisms to change the materials in the vat, , or by dropping puddles of material onto the vat which is cleaned by an air jet . However, DLP printers with these kinds of modifications are not widely available on a commercial scale.…”

Section: Introductionmentioning

confidence: 99%

“…These issues also limit the production of multimaterial objects with complex patterns. These challenges include the formation of an interface at the point of a material change, the change in lateral dimensions with material change, and difficulty in producing variations in the lateral ( x – y ) plane. , Previous studies have shown that lateral deviations can be resolved by suitable CAD model correction . However, there are no studies which sufficiently address the other two challenges.…”

Section: Introductionmentioning

confidence: 99%

“… 28 However, there are no studies which sufficiently address the other two challenges. Rank et al 25 described the printing of samples with four different materials on the x-y plane by dividing the vat into four separate sections. However, this technique is applicable only for certain limited geometries and not applicable for more complex shapes, such as contact lenses.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

3D Printing of Multimaterial Contact Lenses

Hisham

Salih

Butt

2023

ACS Biomater. Sci. Eng.

View full text Add to dashboard Cite

3D printing of multimaterial objects is an emerging field with promising applications. The layer-by-layer material addition technique used in 3D printing enables incorporation of distinct functionalized materials into the specialized devices. However, very few studies have been performed on the usage of multimaterial 3D printing for printable photonic and wearable devices. Here, we employ vat photopolymerization-based 3D printing to produce multimaterial contact lenses, offering enhanced multiband optical filtration, which can be valuable for tackling ocular conditions such as color blindness. A combination of hydroxyethyl methacrylate (HEMA) and polyethylene glycol diacrylate (PEGDA) was used as the base hydrogel for 3D printing. Atto565 and Atto488 dyes were added to the hydrogel for wavelength filtering, each dye suitable for a different type of color blindness. Multimaterial disks and contact lenses, with separate sections containing distinct dyes, were 3D-printed, and their optical properties were studied. The characteristics of multimaterial printing were analyzed, focusing on the formation of a uniform multimaterial interface. In addition, a novel technique was developed for printing multiple dyed materials in complex lateral geometrical patterns, by employing suitable variations in CAD models and the UV curing time. It was observed that the multimaterial printing process does not negatively affect the optical properties of the contact lenses. The printed multimaterial contact lenses offered a combined multi-band color blindness correction due to the two dyes used. The resulting optical spectrum was a close match to the commercially available color blindness correction glasses.

show abstract

“…Selective Laser Melting (SLM) is emerged as dominant metal AM technology, due to its unique advantage of unparallel design freedom with minimum surface defects 11,12 . One notable advantage of this AM technique is its ability to directly fabricate intricate lenses or mirrors by customizing the material according to specific requirements [13][14][15] . Akhil et al demonstrated selective laser melting based additive manufacturing surface characteristics using the analysis of surface images 16 .…”

Section: Introductionmentioning

confidence: 99%

Discrete wavelet transforms analysis of vibration signals for correlating tool wear in diamond turning of additive manufactured Ti-6Al-4V alloy

Manjunath,

Tewary,

Khatri

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

Ultra-precision machining (UPM) of Ti-6Al-4V alloy is widely regarded as a challenging material processing due to excessive tool wear and chemical reactivity of the tool and workpiece. Tool wear has a significant influence on the surface quality and also causes damage to the substrate. Therefore, it is critical to consider the tool condition during diamond turning, especially as precision machining moves toward intelligent systems. Consequently, there is a need for effective ways for in-process tool wear monitoring in UPM. This study aims to monitor the diamond tool wear using time-frequency-based wavelet analysis on vibrational signals acquired during the machining of Additively Manufactured (AM) Ti6Al4V alloy. The analysis employed Daubechies wavelet (db4, level 8) to establish a correlation between the Standard Deviation (SD) of the magnitude in the decomposed vibrational signal obtained from both the fresh and used tools. The analysis revealed that at a feed rate of 1 mm/min, the change in SD is 32.3% whereas at a feed rate of 5 mm/min, the change in SD is 8.4%. Furthermore, the flank wear and microfractures are observed using a scanning electron microscope on the respective flank and rake face of the diamond tool.

show abstract

3D Printing of Optics Based on Conventional Printing Technologies

Cited by 6 publications

References 73 publications

Additive Manufacturing of Transparent Multi‐Component Nanoporous Glasses

Additive Manufacturing of Transparent Multi‐Component Nanoporous Glasses

3D Printing of Multimaterial Contact Lenses

Discrete wavelet transforms analysis of vibration signals for correlating tool wear in diamond turning of additive manufactured Ti-6Al-4V alloy

Contact Info

Product

Resources

About