Two beam scanning optical system

Abstract

Abstract PURPOSE:To make one of two beams usable for recording and the other usable for reading by combining two laser beams having polarizing characteristics to one with the 1st polarizing beam splitter and separating the same into two beams with the 2nd polarizing beam splitter. CONSTITUTION:Since the 1st polarizing beam splitter 3 reflects the S polarized light from semiconductor lasers 1, 2 and allows the transmission of the P polarized light, the two beams are combined to one beam which is scanned with a scanner 4 such as a polygonal mirror and is conducted to the 2nd polarizing beam splitter by an optical system 5 such as an FQ lens. Hereon the beams combined once to one are separated to two beams. The S polarized beam is stopped down as a small spot on an original 7 such as document and is used as a beam for reading documents, and the other beam is used as a laser printer on a photosensitive drum 8.

Inventors

• 👤 Kimio Tateno
• 👤 立野　公男
• 👤 Susumu Saito
• 👤 進 斉藤

Bibliographic Details