A substrate conveying system for conveying a substrate contained in an accommodating container having a supporting member for supporting the substrate. The system preferably utilizes a continuous-wave radar generating short-wavelength radio-frequency signal beam-scanned over angular displacements following a scanning pattern toward a target area. A pair of spaced apart hooks are provided on the top of the backboard to hook the backboard over the top of a door. According to the invention, on its side oriented toward the clutch plate, the device for axially moving the axial bearing has at least one actuating section that is situated in a second recess of the housing component and on the side oriented toward the clutch plate, cooperates with an adjusting element for the device. Evaluation coefficients k1 to k3 for respectively weighting evaluation functions f1 to f3 are determined based on an APR average value. The emitter comprises hemispheroidal nanofiber clusters that emit electrons at low field strengths and high current densities, producing bright light by the interaction of the electrons and a fluorescent andor phosphorescent film on an anode spaced across an evacuated gap.