Abstract
A general problem when using a Schlieren optical system in an Analytical Ultracentrifuge is the modulation of the beam of parallel light, which passes the sector-shaped cell during a measurement. In this paper, two new facilities to modulate the laser beam are described. In the first set-up presented, a laser diode is used as the source of light. This diode can be modulated with a multiplexer up to at least 50 000 rpm in a simple way. The second set-up is realized with a Model E by the use of a fast shutter camera. The TTL signal, which is generated by the multiplexer in dependence on the cell position, controls the shutter of this camera. By means of both new setups the light intensity, which is available for the measurements, is raised and the calibration procedure is easier in comparison to the equipment developed earlier.
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References
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© 1999 Springer-Verlag
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Kisters, D., Borchard, W. (1999). New facilities to improve the properties of Schlieren optics. In: Cölfen, H. (eds) Analytical Ultracentrifugation V. Progress in Colloid and Polymer Science, vol 113. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-48703-4_2
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DOI: https://doi.org/10.1007/3-540-48703-4_2
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Print ISBN: 978-3-540-66175-7
Online ISBN: 978-3-540-48703-6
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