Method and apparatus for performing spectrometric measurements

A method for performing spectrometric measurements, said method comprising:

• supplying a laser light generated by a tunable laser light source with an excitation wavelength to an optical sensor which produces a sample specific response light signal;
• measuring by an optical reference filter the laser light with the excitation wavelength and feeding it back as a reference signal to provide wavelength calibration of the tunable laser light source;
• measuring by an optical measurement filter the sample specific response light signal produced by the optical sensor;
• and
• coupling thermally the optical reference filter and the measurement filter to maintain a stable wavelength relationship between the filter characteristics of the optical filters.

A virus detection device comprising an apparatus adapted to perform spectrometric measurements, said apparatus comprising:

• a tunable laser light source adapted to generate a laser light with an excitation wavelength supplied to an optical sensor which produces a sample specific response light signal;
• an optical reference filter adapted to measure laser light with the excitation wavelength fed back as a reference signal to provide wavelength calibration of the tunable laser light source;
• at least one optical measurement filter adapted to measure the sample specific response light signal produced by the optical sensor;
• wherein the optical reference filter and the at least one optical measurement filter are thermally coupled to maintain a constant wavelength relationship between the filter characteristics of the optical filter.