Patent ID: 7354136

Claim:
An inkjet head comprising: a plurality of nozzles for ejecting ink arranged on an ink ejection face of the inkjet head in 4n rows (n: a natural number) extending parallel to each other in one direction such that projection points of the nozzles obtained by projecting all the nozzles constituting the 4n rows on an imaginary straight line extending in the one direction, from a direction parallel to a plane including therein the 4n rows, and perpendicular to each row, are arranged on the imaginary straight line at regular intervals, the plurality of nozzles being arranged in a cycle corresponding to a distance between the projection points at both ends of 4n+1 projection points arranged on the imaginary straight line; the total of products each obtained by a peak value of a modulation transfer function defined by the arrangement of the plurality of nozzles, multiplied by a value of a visual transfer function at a spatial frequency corresponding to the peak value of the modulation transfer function, being not more than 0.10.