Two-beam scanning optical system

Details Two-beam scanning optical system Two-beam scanning optical system

G - Physics

02

B

88/96.8

G02B 27/00 (2006.01) G02B 26/12 (2006.01) G06K 15/12 (2006.01) H04N 1/207 (2006.01)

Patent

CA 1195865

ABSTRACT OF THE DISCLOSURE A two-beam scanning optical system comprising two laser beams each having a polarization charac- teristic, a first polarization beam splitter for compounding the two laser beams into one laser beam, a rotary polygonal mirror for scanning the compounded laser beam, a second polarization beam splitter for separating the compounded laser beam into two laser beams, and a lens system for focusing the separated laser beams onto a surface of a sensitive drum of a laser printer and onto a surface of an original document to be read, respectively, so that said two separated laser beams scan the respective surfaces of the sensitive drum and the original document.

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