A disk cartridge has various structures for clearly delineating the cartridge from foreign objects which may cause damage to a disk drive. In one embodiment, one or more serial reflectors are embedded within a cartridge so as to return a reflected illuminance pattern distinguishable from a flat specular...http://www.google.fr/patents/US6067214?utm_source=gb-gplus-shareBrevet US6067214 - Data cartridge marker for foreign object detection
Data cartridge marker for foreign object detection
