@conference{102216, author = {Quandou Wang and Guangjun Gao and Ulf Griesmann}, title = {Radius Measurement of Spherical Surfaces With Large Radii-of-Curvature Using Dual-Focus Zone Plates}, year = {2008}, month = {2008-10-20}, publisher = {Technical Digest of the 2008 Optical Society of America Optical Fabrication and Testing Meeting, Rochester, NY}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=824680}, language = {en}, }