Abstract: A laser diode in a recorder is thermally stabilized. The laser diode is used to produce a light beam, which is modulated by superimposing a basic current and a modulation current derived from an image signal, and exposes a recording material point by point and line by line. Between the exposure periods, wherein in each case one line is exposed, there are return periods, wherein the light beam is guided to the start of the next line, and wherein the laser diode is modulated for the purpose of thermal stabilization. In the return period, the laser diode is modulated with the basic current during a stabilization period, the sum of the modulation times during the exposure period and during the stabilization period being constant. In addition, during the return period, the laser diode can be modulated with a modulation current, which is derived from the inverted image signal from the preceding or the following line.

Abstract: A laser diode in a recorder is thermally stabilized. The laser diode is used to produce a light beam, which is modulated by superimposing a basic current and a modulation current derived from an image signal, and exposes a recording material point by point and line by line. Between the exposure periods, wherein in each case one line is exposed, there are return periods, wherein the light beam is guided to the start of the next line, and wherein the laser diode is modulated for the purpose of thermal stabilization. In the return period, the laser diode is modulated with the basic current during a stabilization period, the sum of the modulation times during the exposure period and during the stabilization period being constant. In addition, during the return period, the laser diode can be modulated with a modulation current, which is derived from the inverted image signal from the preceding or the following line.

Abstract: A method and apparatus is provided for exposing the recording material. A light beam is generated by a light source. The light beam passes through an optical isolator, through a light modulator, and then exposes recording material point-by-point and line-by-line. The modulator is activated during exposing of each line in an exposing time span, the modulator being deactivated at least at times within a return time span for each line. The optical isolator is enabled during the exposing time span. To compensate for heating of the optical isolator, the optical isolator is also activated for at least a portion of the return time span. A sum of time extents of the exposing time span and the compensation time span are approximately a constant for each line. Activation of the isolator during the compensation time span compensates for thermal effects which occur in the optical isolator as a result of activation and de-activation thereof.