A bar-code reader includes a laser source for emitting a laser beam, and a scan device having reflecting surfaces for scanning a bar code with the laser beam according to a predetermined scanning pattern. A window passes the laser beam from the scan device toward the bar code. A condensing device is...http://www.google.de/patents/US5900615?utm_source=gb-gplus-sharePatent US5900615 - Bar-code reader having advanced emission-condensing unit
