1. OptoTech Optikmaschinen GmbH, Optotech OWI 150 XLC Interferometer (2022). 〈https://www.optotech.de/en/measuring/owi-150-xlc〉.
2. OptoTech Optikmaschinen GmbH, 8-Axis Ultra-Precision Generating and Polishing Center (2022). 〈https://www.optotech.de/en/precision-optics/upg-2000-cnc〉.
3. QED Technologies, ASI(Q) Aspheric Stitching Interferometer with QIS (2022). 〈https://qedmrf.com/ssi-metrology/asiq/〉.
4. ZEISS Metrology, Zeiss Contura Bridge Coordinate Measuring Machine (2022). 〈https://www.zeiss.com/metrology/products/systems/coordinate-measuring-machines/bridge-type-cmms/contura-2019.html〉.
5. AMETEK.Inc. Taylor Hobson Metrology, LUPHOScan 850 HD Non-contact Profilometer (2020). 〈https://www.taylor-hobson.com/products/non-contact-3d-optical-profilers/luphos/luphoscan-850-hd〉.