Patent ID: 6407867
Filing Date: 2002-06-18
Classification: B41J,G02B

Abstract:
A beam spacer for closely spacing four parallel light beams comprising:a first laser source for emitting a first light beam, a second laser source for emitting a second light beam, a first roof mirror for reflecting said first light beam and said second light beam, said first light beam and said second light beam being separated by a first spacing, said first light beam and said second light beam being parallel, a third laser source for emitting a third light beam, a fourth laser source for emitting a fourth light beam, a second roof mirror for reflecting said third light beam and said fourth light beam, said third light beam and said fourth light beam being separated by said first spacing, said third light beam and said fourth light beam being parallel, and a beam splitter cube for reflecting said first light beam and said second light beam from said first roof mirror to a scan line, said beam splitter cube for transmitting said third light beam and said fourth light beam from said second roof mirror to said scan line, said beam splitter cube interlacing said light beams at said scan line, whereby said first light beam and said fourth light beam are separated by a second spacing at said scan line, said fourth light beam and said second light beam are separated by said second spacing at said scan line, said second light beam and said third light beam are separated by said second spacing at said scan line, wherein said first light beam, said second light beam, said third light beam and said fourth light beam are parallel at said scan line and said second spacing is less than said first spacing.