Three-dimensional printing of glass micro-optics

To meet the increasing needs of high-precision glass micro-optics and address the major limitations of current three-dimensional (3D) printing optics, we have developed a liquid, solvent-free, silica precursor and two-photon 3D printing process. The printed optical elements can be fully converted to transparent inorganic glass at temperatures as low as 600 C with a shrinkage rate of 17%. We have demonstrated the whole process, from material development, printing, and performance evaluation of the printed glass micro-optics. 3D printing of glass micro-optics with isotropic shrinkage, micrometer resol ution, low peak-to-valley deviation (<100 nm), and low surface roughness (<6 nm) has been achieved. The reported technique will enable the rapid prototyping of complex glass micro-optics previously impossible using conventional glass optics fabrication processes. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Automated summary

A novel 3D printing process for glass micro-optics has been developed in this study, which can convert printed optical elements into transparent inorganic glass at low temperatures with specific performance indicators.