Liquid crystal mask, liquid crystal type laser marker, and marking method using this

摘要

When one design is divided into a plurality of blocks and engraved, a clearance is not generated on the alignment face of each block.;For this purpose, in a liquid crystal type laser marker in which the engraved design is displayed on a liquid crystal mask composed of a plurality of pixels and the laser light transmitted from the liquid crystal mask is irradiated to the workpiece,;The liquid crystal mask having the pixels on the outermost periphery or on the sides of some of the pixels has a liquid crystal mask different from that of the pixels in the inside and the one design is divided into the plurality of blocks 1, (11) controls the engraving position so that the engraved position by the adjacent block (1) overlaps the engraved position of the adjacent block (1) by the required length of the portion corresponding to the outermost pixel of the liquid crystal mask, . Alternatively, the liquid crystal masks having the same dimensions of all the pixels and the position of the engraving by the liquid crystal mask displaying each block 1 may be different from the positions of the adjoining blocks 1 and the outermost pixels of the liquid crystal mask And a controller 11 for controlling the engraving position so as to overlap with a predetermined length of a portion corresponding to the engraved portion.