Di Chang
Papers
1
Total Citations
11
H-Index
1
About
Di Chang is a researcher working at the intersection of precision measurement, optical interferometry, and spatial orientation representation. Their most notable contribution to date centers on advancing the theoretical and practical foundations of six-degree-of-freedom (6-DOF) grating interferometry — a sophisticated field critical to ultra-precise motion measurement in advanced manufacturing, semiconductor lithography, and metrology systems. In their most cited work (2021, 11 citations), Chang identified a significant gap in the literature: while orientation representation is fundamental to 6-DOF interferometric measurement, the conventional roll-pitch-yaw angle system — borrowed from aviation and robotics — carries inherent limitations when applied to multi-degree-of-freedom interferometric contexts. To address this, Chang proposed "fused-like angles" as a principled alternative, offering improved mathematical properties and practical advantages for representing orientation in such systems. This contribution demonstrates both interdisciplinary thinking — bridging robotics-derived mathematical tools with optical precision engineering — and a keen awareness of underexplored challenges in an otherwise technically mature field. Though early in citation accumulation, this work positions Chang as an emerging voice in high-precision measurement science, with potential to influence instrument design and calibration methodologies going forward.
Research Focus
Key Achievements
Top Papers
- 1