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Traceable Reference Full Metrology Chain for Innovative Aspheric and Freeform Optical Surfaces Accurate at the Nanometer Level

Yassir Arezki, Rong Su, Ville Heikkinen, François Leprete, Pavel Posta, Youichi Bitou, Christian Schober, Charyar Mehdi-Souzani, Bandar Abdulrahman Mohammed Alzahrani, Xiangchao Zhang, Yohan Kondo, Christof Pruss (+5 others)
2021 Sensors  
Agreement among the results of several partners was observed, which demonstrates the establishment of a traceable reference full metrology chain for aspherical and freeform optical surfaces with small  ...  The design of innovative reference aspheric and freeform optical elements was investigated with the aim of calibration and verification of ultra-high accurate measurement systems.  ...  Description of the traceable reference full metrology chain for aspherical and freeform optical surfaces with respect to the SI unit meter definition.  ... 
doi:10.3390/s21041103 pmid:33562598 pmcid:PMC7915810 fatcat:tjmu7gk65zdfrfe2mq6e4yueoe

Tilted wave interferometer measures aspheres and freeform optics

2016 SPIE Professional  
measurement of important classes of optical functional surfaces: aspheres and freeforms.  ...  In cooperation with the company Mahr a research team at the Institute of Applied Optics of the University Stuttgart has developed and implemented an entirely new approach for the precise and effective  ...  Optical metrology enables a unique approach for the measurement of surfaces, both technical and optical, over a wide range from macro to nano.  ... 
doi:10.1117/2.4201607.04 fatcat:dscuxmx6arhyzdkdfi4wasmi4q

Aalborg Universitet Investigation of the influence of the properties of polymer solution on the properties of electrospun fibers Sponsors Platinum Silver Rheology course sponsored by Poster prizes sponsored by Industrial Exhibition Malvern Instruments Formulaction Conference Venue & Floor Plan

Xiaoli Liu, Johanna Aho, Stefania Baldursdottir, Haiyan Qu, Lars Christensen, Porskjaer, Jukka Rantanen, Yang, X Liu, S Qu, H Christensen, J Yang (+1 others)
These cross-links are not fixed and can slide along the polymer chains of the network and equalize the tension of polymer chains in a manner similar to pulleys; this is called the pulley effect.  ...  The complete unthreading of the chain being prevented by bulky groups attached to its extremities.  ...  The steps in the traceability chain are in particular: 1. Thorough calibration of a "primary" reference rheometer traceable to the Système international d'unités (SI); 2.  ...