To simplify the constitution of a driving circuit, to facilitate timing control and prevent color slippage from occurring even when carrying speed becomes irregular by providing a light receiving means receiving emitted light at a position, where a photosensitive material is exposed, and an adjustment means adjusting the position of a light emitting element array.
The light emitted from a light mixing means consisting of dichroic mirrors 29a and 29b is condensed on photographic paper by a Selfoc lens array 25 for exposure. An image sensor 105 is arranged at an exposure position by a CPU 30. Light corresponding to the image signals of every color is emitted in identical timing by the array light sources 21-23 receiving light emission signals from head driver circuits(HD circuits). Then, the emitted light mixed by the light mixing means is made incident on the sensor 105 and supplied to the CPU 30. The CPU 30 controls the position adjustment means 21A-23A respectively in a prescribed direction so as to execute focusing and adjustment of the exposure position.
ITO EIJI
SUZUKI KOJI
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