摘要:
A method of aligning a multi-station flexographic printing system using Moiré interference includes printing, using a first flexographic printing station, at least one Moiré interference pattern in a unique location on a first side of a substrate for each of at least one subsequent flexographic printing stations of the system. For each of the at least one subsequent flexographic printing stations, at least one inverted Moiré interference pattern is printed on either side of the substrate in a location corresponding to that station's unique location on the substrate. An alignment of at least one of the at least one subsequent flexographic printing stations is adjusted when at least one Moiré interference pattern interferes with a corresponding at least one inverted Moiré interference pattern.
摘要:
A method of aligning transparent substrates includes disposing one or more Moiré interference patterns on a side of a first transparent substrate, disposing one or more inverted Moiré interference patterns on a side of a second transparent substrate, and aligning the first transparent substrate to the second transparent substrate using Moiré interference. Each Moiré interference pattern is center-aligned to a corresponding inverted Moiré interference pattern.