Apparatus for illuminating matter

An apparatus for detecting matter, the apparatus comprising:

• an irradiation arrangement, which comprises a first illumination device adapted to emit a first set of illumination beams and a second illumination device adapted to emit a second set of illumination beams,
• a scanning element,
• an optical arrangement, adapted to receive and direct at least one of said first and second sets of illumination beams towards said scanning element,
• wherein the scanning element is configured to redirect only one of said first and second sets of illumination beams towards a first detection zone through which the matter is provided,
• a detector system including at least one sensor arrangement adapted to receive and analyse optical radiation which optical radiation is reflected, emitted and/or scattered by matter in the first detection zone, in response to said matter being irradiated by one of said first and second set of illumination beams,
• a reference arrangement comprising a white reference element, which reference arrangement is adapted to receive optical radiation from at least one of said first illumination device and said second illumination device and adapted to direct said received optical radiation towards said detector system via said white reference element, and
• wherein said irradiation arrangement further comprises an active illumination position and a least one in-active illumination position, and an automated or semiautomated switching device comprising:
• a carrier having a first receiving portion for receiving and holding said first illumination device, and a second receiving portion for receiving and holding said second illumination device, and wherein said carrier is movable between a first position, wherein said first receiving portion holds said first illumination device in said active illumination position and said second receiving portion holds said second illumination device in one of said at least one in-active illumination position, and a second position wherein said first receiving portion holds said first illumination device in one of said at least one in-active illumination position and said second receiving portion holds said second illumination device in said active illumination position, and wherein said irradiation arrangement is configured to emit an illumination beam only from the one of said first and second illumination devices arranged in said active illumination position,
• guiding elements configured to guide the movement of said carrier form said first position to said second position
• an actuator for physically moving said carrier form said first position to said second position based on the condition of said first illumination device and/or in response to a user-initiated input.