SMALL-SIZED IMAGING HEAD, HIGH-SPEED MULTI-HEAD LASER IMAGING ASSEMBLY, AND HIGH-SPEED MULTI-HEAD LASER IMAGING METHOD

摘要

PROBLEM TO BE SOLVED: To overcome a limitation and a defect of a conventional CTP system, by improving productivity thereof.

SOLUTION: An optical projection head includes: a laser diode array having a plurality of light-emitting elements; a TIR modulator capable of diffracting a beam from the array according to an applied electric field; an optical mixer capable of equalizing an energy beam from the array; a first optical component group capable of forming an energy beam from the laser array and turning that to the mixer; a second optical component group capable of turning the beam emitted from the mixer toward the modulator; a lens capable of focusing the beam emitted from the modulator on a contact member which can remove an undesirable diffraction beam; and an optical assembly which is an imaging objective assembly capable of forming an image by focusing the beam emitted from the contact member on a radiation sensitive medium, and includes means for adjusting the radiation of the beam from the modulator to be a selected value which influences on image width.

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