Patent ID: 7440080
Filing Date: 2008-10-21
Classification: G03B

Abstract:
1. An automatic correction method for a direct exposure apparatus in which a plurality of exposure heads having exposure elements arranged in a two-dimensional manner with an inclination with respect to relative movement of an exposure target are arranged in a direction orthogonal to the direction of said relative movement, comprising: an illumination step of illuminating two exposure elements, which are included in adjacent ones of said exposure heads separately and which are to expose an identical line on said exposure target, among said exposure elements; a detection step of detecting the illumination of said two exposure elements by using a sensor that is moved, on the side where said exposure heads are illuminated, in the direction in which said exposure heads are arranged; and a correction step of calculating correction amounts for correcting so that said two exposure elements can expose the identical line on said exposure target, based on a detection result of the illumination of said exposure elements by said sensor.