1. Center for Optical and Laser Engineering (COLE) School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore
2. Singapore Centre for 3D Printing (SC3DP) School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore
3. Chester F. Carlson Center for Imaging Science Rochester Institute of Technology Rochester NY 14623 USA
4. School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore
5. Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak‐ro Yuseong‐gu Daejeon 34141 South Korea