Patent ID: 7271941
Filing Date: 2007-09-18
Classification: B41J,G02B

Abstract:
1. A laser scanning unit comprising: a housing; a scanning device; a first pre-scan assembly generating a first light beam and directing said first light beam toward said scanning device; a second pre-scan assembly generating a second light beam and directing said second light beam toward said scanning device; a first post-scan assembly receiving said first light beam reflected from said scanning device and causing a first portion of said first light beam to scan along a first scan path; a second post-scan assembly receiving said second light beam reflected from said scanning device and causing a first portion of said second light beam to scan along a second scan path; said first post-scan assembly further reflecting a second portion of said first light beam in a direction away from said first scan path; and a shield associated with said housing for blocking said second portion of said first light beam reflected by said first post-scan assembly during at least a portion of the scan of said first portion of said first light beam along the first scan path so as to prevent said second portion of said first light beam from entering said second post-scan assembly during said at least a portion of said scan of said first portion of said first light beam.