Patent ID: 6927402

Claim:
A device for detecting different fluorescence signals of a sample carrier illuminated over a surface thereof by different excitation wavelengths, the excitation wavelengths having a plurality of samples excited by different optical wavelengths to output different fluorescent light, comprising: a first light source and a second light source being provided for generating light beams of different optical wavelengths, the light beams being directed via an excitation optical system toward a surface of a sample carrier; fluorescent light emitted by the sample carrier being directed to a receiver, wherein said receiver generates fluorescence signals based on the fluorescent light being projected onto a photosensitive element of the receiver; and a mirror arrangement with silvered and transmitting regions being connected between the light sources and the sample carrier; wherein in a first operating state, a first light beam of the first light source passes through a transmitting region to the sample carrier, and a second light beam from the second light source is reflected from the silvered region such that it does not reach the sample carrier, and a first fluorescent light is emitted from the sample carrier to the reflecting region, which reflects it to a first fixed mirror, and that the first fixed mirror reflects the first fluorescent light through the transmitting region to the receiver, the receiver being screened from the light sources in such a way that the receiver detects fluorescent light emitted by the plurality of samples, and in a second operating state, the second light beam of the second light source passes through the transmitting region to the sample carrier, and the first light beam from the first light source is reflected from the silvered region such that it does not reach the sample carrier, and a second fluorescent light is emitted from the sample carrier to the reflecting region, which reflects it to a second fixed mirror, and the second fixed mirror reflects the second fluorescent light through the transmitting region to the receiver, the receiver being screened from the light sources in such way that the receiver detects fluorescent light emitted by the plurality of samples.