| 摘要 |
A mail processing system with a UV imaging subsystem that uses radiation filtering for improved reliability in processing mail. The UV imaging subsystem has one or more filters, such as a short pass filter between a UV radiation source and a mailpiece under examination or long pass filter between the mailpiece and a detector array. The UV subsystem can quickly and reliably form UV images. Though the images are of low resolution, the image quality is adequate to allow the system to identify features-such as barcodes, IBI and stamps-on mailpieces. The image quality is also sufficient to allow the mail processing system to make mail processing decisions-such as whether to invert the mailpiece or where to spray a cancellation mark-as mailpieces are passing through the mail processing system.
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