Postal parcel image acquisition device for use in postal sorting machine, has LEDs including light radiations that illuminate address information visible by contrast, and fluorescent mark in zones of window, respectively

摘要

The device has an optical band-pass filter arranged in front of a time delayed integration type linear charge coupled device camera. The filter has an opaque screen, which is centered on an emission wavelength of a fluorescent mark e.g. bar code, during its excitation by a light radiation of a LED (20). Another LED (21) has another radiation that contains the wavelength of the mark during its excitation by the former radiation. The light radiations of the LEDs illuminate address information visible by contrast, and the mark in lower and upper zones (22, 23) of a window (4), respectively.