The present invention is one gene construct or a combination of two gene constructs or expression vectors incorporating a Cypridina luciferase gene and a copepod luciferase under the control of distinct promoters. The display device is provided with a function device having a first interface and a second interface, and stores configuration information assigning the same class to the first interface and the second interface in a storage section. At least a portion of the components are instructed to switch between the first, second, and third modes. 6, where ENP denotes the diameter of the entry pupil of the magnification changer at the maximum magnification and F denotes the focal length of the objective, and tan0. An imaging device comprising an image sensor, an analogue image processor, an analogue to digital converter, and a timing generator, according to the description given above, providing timing signals to the image sensor, the analogue image processor and the AD converter. The cooling channels are formed by corrugated components, the corrugation shape of which matches the outer surface, including the outer contour in corner regions of the coil.