Reliable and at the same time simple operation of a plurality of system components using only a single control element is guaranteed by means of the combination of a control lever which can be swiveled manually and a rotational control unit which can be rotated manually. Each of the capillaries has an open end flush with a front face of the tubesheet. The power-generating device further comprises one or more wires for transmitting electrical signals between a first and a second electrical component by way of the power-generating device. According to the invention, it is foreseen to use reflected transmission and polarisation holography with different write and read wavelengths, and to correct during reading the distortion in the readout channel caused by the difference between the write and read wavelengths. The adaptive filter updates the filter coefficient at the update rate. The structural strength of the shadow mask is increased, thereby greatly improving thermal distortion and vibration problems of the shadow mask as well as greatly improving the qualities such as the drop characteristic, doming characteristic and inner pin distortion problem.