TY - CONF AU - Ulf Griesmann AU - Quandou Wang AU - Johannes Soons AU - Remi Carakos C2 - SPIE Optics and Photonics 2005 Conference, San Diego, CA DA - 2005-01-01 LA - en M1 - 5869 PB - SPIE Optics and Photonics 2005 Conference, San Diego, CA PY - 2005 TI - A Simple Ball Averager for Reference Sphere Calibrations UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=822303 ER -