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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
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
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. ...fatcat:4hdhz73derb3xij2z3dozx6loy