A spectrometer module10 comprising a plurality of separate electronic circuit modules20 is disclosed. Each separate electronic module comprises an integrated sensor circuit including a light sensitive area22 occupying part of an area of the integrated sensor circuit, the integrated sensor circuit being arranged to detect incident light. In one aspect, the plurality of separate electronic circuit modules includes a group of adjacent electronic circuit modules. The light sensitive areas of the electronic circuit modules20 in the group are so arranged on the respective integrated sensor circuits that the group of adjacent electronic circuit modules20 is mounted so that the light sensitive areas thereof are arranged in vicinity to each other. The spectrometer module10 includes an optical module, which is common to said plurality of separate electronic circuit modules and arranged to direct incident light towards the light sensitive areas22 of each of said electronic circuit modules20.