METHOD AND DEVICE FOR PRODUCING REGISTERED HOLOGRAPHIC MICROSTRUCTURE REFRACTIVE AND REFLECTIVE EFFECTS

摘要

An apparatus and method for preparing a flexible substrate with uniformly spaced images and corresponding physical or virtual registration marks at regular intervals, applying an energy curable coating to the flexible substrate either uniformly or in selected spots, and providing a master web carrying uniformly spaced impressing images and corresponding registration marks at regular intervals, where accurate alignment of the registration marks of the flexible substrate and the master web is achieved by stretching the master web to align the registration marks. One embodiment of the apparatus comprises scanners which sense the location of the registration marks on the flexible substrate and the master web; an electronic register control system programmed to monitor error signals representing the on-the-fly deviation in the alignment of the master and flexible substrate registration marks and makes determinations of the amount of stretching that must be applied to the master web in order to bring the registration marks into alignment; and means for achieving the appropriate stretching of the master web to produce the desired alignment.