Patent ID: 6886154

Claim:
A multi-exposure drawing apparatus that draws a given pattern on a drawing surface by using a multi-exposure method, and an exposure unit including a plurality of optical modulation elements arranged in a matrix, which comprises: a first memory that stores raster-data of said given pattern; a second memory that stores first-coordinate data which represents a position of each of said optical modulation elements relative to said drawing surface; a third memory that stores second-coordinate data which represents a position of said exposure unit relative to said drawing surface; a coordinate transformation processor that is able to perform a coordinate transformation on one of said first-coordinate data and said second-coordinate data; a calculating processor that calculates address-data in accordance with a pixel size used for said raster-data, and based on the sum of said first-coordinate data and said second-coordinate data; and an exposure-data generating processor that generates exposure-data for each of said optical modulation elements, by means of reading out said raster-data corresponding to said address-data from said first memory; wherein a pattern that is obtained by reversing said coordinate transformation of said given pattern, is drawn on said drawing surface as a result of said coordinate transformation performed on one of said first-coordinate data and said second-coordinate data.