METHOD AND SYSTEM FOR ADJUSTING THE PITCH OF LIGHT SPOTS USED TO READ AN INFORMATION CARRIER

摘要

The invention relates to a method and system for adjusting the pitch of an array of light spots (103) in an information carrier reading apparatus so as to correspond with the size of the macro-cells in which data is stored. A degree of mismatch between the pitch of the array of light spots (103) and the size of the macro-cells is determined when the probe array generation device (102) is illuminated with an input light beam, and the pitch adjusted accordingly by adjusting the distance of the focus of the light source (12) so as to converge or diverge the input light beam (104) to the probe array generation device (102), thereby to create a non-collimated input light beam (104) and magnify the pitch of the array of light spots (103) accordingly.