caa a22 4500 46581381X CHVBK 20180323112122.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF01331796 doi (NATIONALLICENCE)springer-10.1007/BF01331796 Two-color rotary modulated flow birefringence [Elektronische Daten] [V. Abetz, G. Fuller] A method is described that solves the problem of determining the correct birefringence and orientation angle of samples having multiple orders of retardation. The approach simultaneously uses two wavelengths of light combined with modulation of the polarization vector using a high-speed rotating half waveplate. The simultaneous application of two wavelengths is possible with the use of an achromatic waveplate. The technique is demonstrated by performing start-up Couette flow experiments on a concentrated polystyrene solution that produced multiple orders in retardation. Steinkopff, 1990 Birefringence nationallicence multiple order retardation nationallicence Abetz V. Department of Chemical Engineering, Stanford University, 94305-5025, Stanford, CA, USA aut Fuller G. Department of Chemical Engineering, Stanford University, 94305-5025, Stanford, CA, USA aut Rheologica Acta Steinkopff-Verlag 29/1(1990-01-01), 11-15 0035-4511 29:1<11 1990 29 397 https://doi.org/10.1007/BF01331796 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01331796 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abetz V. Department of Chemical Engineering, Stanford University, 94305-5025, Stanford, CA, USA aut NATIONALLICENCE 700 1- Fuller G. Department of Chemical Engineering, Stanford University, 94305-5025, Stanford, CA, USA aut NATIONALLICENCE 773 0- Rheologica Acta Steinkopff-Verlag 29/1(1990-01-01), 11-15 0035-4511 29:1<11 1990 29 397 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer