| 摘要 |
The present invention relates to an apparatus for image projecting and/or material processing having a deflection device ( 3 ) for variably deflecting a light beam ( 2 ) emanating from a light source ( 1 ) onto a projection area or a processing area ( 7 ), a modulation device ( 4 ) for modulating an intensity of the light beam ( 2 ) and a control unit ( 5 ) which is connected to the modulation device ( 4 ) and by means of which the modulation device ( 4 ) can be triggered to modulate the intensity of the light beam ( 2 ) according to input data. Disposed between the deflection device ( 3 ) and the projection area or the processing area ( 7 ) is a shading element ( 6 ), by means of which the light beam ( 2 ) is faded out within a multiplicity of time intervals, into which the total duration of the projection or the processing is subdivided, for one or a multiplicity of time segments, and the control unit ( 5 ) contains a control program which regulates the modulation device ( 4 ) during the time segments in such a manner that an at least approximately constant mean intensity of the light beam ( 2 ) is yielded in the time intervals. The present apparatus and the corresponding method permit attaining a temporally constant temperature of the deflection element of the deflection device during processing and/or projection.
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