Patent ID: 7471309
Filing Date: 2008-12-30
Classification: G02B,G03F

Abstract:
1. An image exposing apparatus for two-dimensionally scanning a printing plate precursor with a light beam modulated based on an image signal to carry out image exposure on the printing plate precursor, said image exposing apparatus comprising: exposing means for emitting a light beam in a pulsed form with a predetermined pulse repetition period onto said printing plate precursor; branching means for branching at least a part of said light beam emitted from said exposing means; a pulse stretcher for stretching a pulse width of a branch beam branched by said branching means; synchronous signal generating means for generating a synchronous signal synchronized with said pulse repetition period of said light beam from said branch beam having the pulse width stretched by said pulse stretcher; and modulating means for modulating said light beam emitted from said exposing means with an image exposure period synchronized with said synchronous signal.