Optics: measuring and testing – Motion stopping
Patent
1977-12-28
1980-03-04
Clark, Conrad J.
Optics: measuring and testing
Motion stopping
356361, 356427, G03B 2732, G01B 902
Patent
active
041914694
ABSTRACT:
The specification describes an interference optical measuring or sensing device, comprising a light source, a beam splitter, two component light paths and a radiation sensor for a multiple hole centrifuge rotor. When the rotor is in motion sample cells and the counter-weight move successively through the component light paths and at a particular position have both light paths extending through them. There is furthermore an arrangement for producing a position signal indicating that a selected hole is in a certain position in which it has both component light paths extending through it. A control arrangement ensures that the measuring device is activated briefly in the predetermined position of the selected hole. The light source continuously supplies light between the periods of activation of the measuring device. The component beam paths are respectively coupled with a control light sensor at positions, which in terms of the direction of light from the light source lie behind the multiple hole rotor and the control light sensor produces a component beam output signal when the respective component beam path is completed by a hole in the rotor. The position signal and the two component beam path signals are supplied to a coincidence circuit, which activates the measuring or sensing device on the simultaneous arrival of all three signals.
REFERENCES:
patent: 2883900 (1959-04-01), Svensson
patent: 3391597 (1968-07-01), Gropper
patent: 3599002 (1971-08-01), Beutelspacher et al.
patent: 3778171 (1973-12-01), Chervenka
patent: 3798958 (1974-03-01), Marini et al.
Paul, Carlton, H.; Pulsed Laser Interferometry (PLI) in the Analytical Ultracentrifuge: I and II, Analytical Biochemistry, vol. 48, pp. 588-612, 1972.
Flossdorf Josef
Schillig Henning
Schindler Klaus-Peter
Clark Conrad J.
Gesellschaft fur biotechnologische Forschung m.b.H.
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