Optical device employing a piezoelectric reflector array for increasing the resolution of a photosensor

摘要

The present invention relates to a dataform reading module. At least one photosensor provides a plurality of different zones for image capture. A lens focuses a respective image representing a portion of a dataform taken along a target line onto a respective one of the plurality of different zones. At least two piezoelectric reflectors are configured to focus an image of adjacent and partially overlapping portions of the dataform taken along the target line onto the lens. An illuminating device illuminates the dataform. The piezoelectric reflectors are configurable to vary the width of the overlapping portions, so that multiple samples of the same dataform can be taken. The piezoelectric reflectors can also be configured to eliminate the overlapping portions for a second reading.