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The growing interest in 3D printing of silica glass has spurred substantial research efforts. The prior work utilizing a liquid silica resin (LSR) demonstrated high printing accuracy and resolution. However, the resin's sensitivity to moisture posed limitations, restricting the printing environment. On the other hand, polyhedral oligomeric silsesquioxane (POSS)‐based materials offer excellent water stability and sinterless features. Yet, they suffer from relatively high shrinkage due to the presence of additional organic monomers. In this study, a polymeric silsesquioxane (PSQ) resin is presented with reduced shrinkage, enhanced moisture stability, and the retention of sinterless features, providing a promising solution for achieving high‐resolution 3D printing of glass objects. Leveraging the two‐photon polymerization (2PP) method, nanostructures are realized with feature sizes below 80 nm. Moreover, the tunability of the refractive index is demonstrated by incorporating zirconium moieties into the resin, facilitating the fabrication of glass micro‐optics with varying refractive indices. Importantly, the self‐welding capability observed between two individual components provides a flexible approach for producing micro‐optics with multiple components, each possessing distinct refractive indices. This research represents a significant advancement in the field of advanced glass manufacturing, paving the way for future applications in micro‐ and nano‐scale glass objects. [ABSTRACT FROM AUTHOR]

To address the major challenges to obtain high spatial resolution in snapshot hyperspectral imaging, 3D printed glass lightguide array is developed to sample the intermediate image in high spatial resolution and redistribute the pixels in the output end to achieve high spectral resolution. Curved 3D printed lightguide array can significantly simplify the snapshot hyperspectral imaging system, achieve better imaging performance, and reduce the system complexity and cost. Two‐photon polymerization process to print glass lightguide array is developed, and the system performance with biological samples is demonstrated. This new snapshot technology will catalyze new hyperspectral imaging system development and open doors for new applications from UV to infrared. [ABSTRACT FROM AUTHOR]

3D printing of optics has gained significant attention in optical industry, but most of the research has been focused on organic polymers. In spite of recent progress in 3D printing glass, 3D printing of precision glass optics for imaging applications still faces challenges from shrinkage during printing and thermal processing, and from inadequate surface shape and quality to meet the requirements for imaging applications. This paper reports a new liquid silica resin (LSR) with higher curing speed, better mechanical properties, lower sintering temperature, and reduced shrinkage, as well as the printing process for high‐precision glass optics for imaging applications. It is demonstrated that the proposed material and printing process can print almost all types of optical surfaces, including flat, spherical, aspherical, freeform, and discontinuous surfaces, with accurate surface shape and high surface quality for imaging applications. It is also demonstrated that the proposed method can print complex optical systems with multiple optical elements, completely removing the time‐consuming and error‐prone alignment process. Most importantly, the proposed printing method is able to print optical systems with active moving elements, significantly improving system flexibility and functionality. The printing method will enable the much‐needed transformational manufacturing of complex freeform glass optics that are currently inaccessible with conventional processes. [ABSTRACT FROM AUTHOR]

This research demonstrates that 3D printing of glass imaging optics has a high potential for precision optical imaging applications. B 3D Printing of Glass Imaging Optics b In article number 2105595, Douglas A. Loy, Rongguang Liang, and co-workers develop a liquid silica resin (the left molecule in the picture) to print optical element with high precision through two-photon polymerization. High-Precision Printing of Complex Glass Imaging Optics with Precondensed Liquid Silica Resin (Adv. Sci. 18/2022). [Extracted from the article]