Patent ID: 8374802
Filing Date: 2013-02-12
Classification: G01N

Abstract:
1. Method for radiometrically investigating N (N is a natural number with N>1) sample radiations of at least two samples, which are caused by the radiation of N emitter elements of at least one radiation element wherein said N emitter elements are emitting radiation during time periods which at least partially overlap, wherein the sample radiation is fluorescent light, comprising the steps: determining a set of N basic frequencies, adding one reference frequency to each of said basic frequencies wherein said reference frequency is higher than each of said basic frequencies, using the N sums of the reference frequency and of the basic frequency to provide N modulation signals wherein each modulation signal is used to modulate the radiation of a different emitter element, detecting the N sample radiations as a sum signal wherein each sample radiation is modulated according to the modulated radiation which caused the respective sample radiation, demodulating the sum signal by using a demodulation method, performing a transformation to transfer the demodulated sum signal from a time dependent signal into a frequency dependent signal, and determining the quantity of at least one individual sample radiation from the amplitude of said frequency dependent signal in dependence of the basic frequency.