Patent ID: 6411419
Filing Date: 2002-06-25
Classification: G02B

Abstract:
A beam scanning optical apparatus comprising:a first optical system comprising a plurality of optical blocks including beam emitters, deflectors and scanning lenses, wherein beams emitted from the beam emitters are deflected by the deflectors, and then led to the scanning lenses so as to be focused onto surfaces to be scanned, a second optical system comprising a plurality of optical blocks including beam emitters, deflectors and scanning lenses, wherein, in the second optical system, beams emitted from the beam emitters are deflected by the deflectors, and then led to the scanning lenses so as to be focused onto surfaces to be scanned, wherein an advancing direction of the beams from the deflectors to the scanning lenses in the first optical system is reverse to an advancing direction of the beams from the deflectors to the scanning lenses in the second optical system, and the beams in the second optical system are led through between optical elements in the first optical system, for scanning the surfaces to be scanned.