In a container assembly for a laser diode module in which a temperature control device is not incorporated in advance, a heat-insulative casing is adapted to accommodate the laser diode module. The analysis typically involves the use of mass spectrometry. This difference is used to derive a modification function that is applied to each display. The scourer according to the present invention is convenient for removal of dirt stuck in deep, narrow recessed portions or the inside corners of a container. Furthermore, a device for imaging the object is described.