US Patent 7199899 Image recording method and apparatus

A method of recording a transmission image composed of dots on a recording medium having the steps of; moving a recording medium in a sub-scanning direction, and moving a recording head relatively with respect to the recording medium in a main scanning direction which is crossing the sub-scanning direction, wherein a diameter D of a dot recorded on said recording medium falls within a range expressed by 1.5A≦D≦A+150 [μm], wherein,A=max(Pm, Ps),Pm=pitch of an array of pixels in the main scanning direction,Ps=pitch of an array of pixels in the sub-scanning direction.