Abstract: The invention concerns a process and circuit for correcting the light-power output of a laser diode. The circuit comprises a generator (2) for generating a driver current (I.sub.T) which determines the light-power output of the laser diode. The driver current (I.sub.T) is modulated by a modulation signal (B). To correct the light-power output, the circuit includes a linear low-pass filter (5) which is acted on by the modulation signal (B) and which approximately simulates the change with time of the internal temperature of the laser diode (1) as a function of the modulation signal (B). The output signal of the linear low-pass filter (5) acts as a driver current (I.sub.T) correction signal (K), thus compensating for the temperature dependence of the laser-diode light-power output.

Abstract: A device for automatic loading of film material on a suction plate by transport roller pairs arranged at two oppositely disposed ends of the suction plate. One pair receives the film material and the other pair further transports the film material. At the two other lateral sides or ends of the suction plate, a roller is respectively provided extending over an entire side of the plate. A cloth can be wound on this roller such that the roller and cloth are so arranged that they respectively form a blind covering the suction plate up to and overlapping lateral edges of the film material.

Abstract: In an electronic pattern generator characters to be recorded are displayed on the screen of a cathode ray tube and then exposed on a recording medium mounted on a carrier, which is displacable in a plane parallel to the plane of the screen.The characters are displayed from video-data recallable from a store. The recalled video-data are transformed into a first video signal for the brightness control of the electron beam of the cathode ray tube into first deflection signals for the beam and into displacement signals for the carrier.For controlling the make-up and composing process the characters are displayed identically on a further screen of a soft copy terminal independently of the display on the screen of the cathode ray tube.By identical display it is understood, that the various type fonts and sizes of characters are not displayed in an unitary fashion, but in the original font of writing, as they will appear later in the typographical composition on the recording medium.