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Title
Phasenfluorometer zur Stoffbestimmung
Date Issued
1995
Author(s)
Grabowski, R.
Patent No
1992-4234071
Abstract
A phase fluorometer (1) serves to determine the substances in a sample (2) and consists of a laser light source (3) which excites the said substance to emit fluorescent light. The laser light source (3) is a laser diode with modulatable intensity and continuously variable frequency; it is connected to an optical system (4) for focusing the rays onto the sample (2). Between a monochromator (6) arranged downstream and the sample (2), there is a further optical system (5) to project the fluorescent light emitted by the sample (2) onto an inlet aperture of a monochromator (6). At the outlet aperture of the monochromator (6) is a measuring detector (7) to generate a measuring signal, whereby a further optical system (8) is arranged between the monochromator (6) and the measuring detector (7) for focusing purposes. A beam splitter (9) which deflects part of the beam coming from the laser diode (3) onto a reference detector (10) linked to the measuring detector (7) is arranged in the beam pat h of the laser diode (3). The phase between the signals and their degree of modulation is determined from the intensity-modulated signals supplied by the measuring and reference detectors (7, 10).
Language
de
Patenprio
DE 1992-4234071 A: 19921009