A method and apparatus for illumination control to increase the manufacturing yield for a bar code and position reference reader in a mass storage auto-changer

摘要

A method and apparatus that allows the adjustment of the intensity of the illumination source in a barcode reader, using the barcode reader as the measuring device, to give a predetermined amount of light from a known target. The adjustment of the intensity of the illumination source in the barcode reader compensates for the manufacturing tolerances of the barcode reader.