Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1997-12-16
1999-11-30
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347241, 347244, 359205, 359206, 359662, 359691, G02B 2608
Patent
active
059951311
ABSTRACT:
A scanning optical apparatus includes a light source device, a first optical element for converting a beam emitted from the light source device to a converging light beam, a deflecting element for deflecting the beam emitted from the light source device, a second optical element for focusing the beam emerging from the first optical element in a linear shape longitudinal in a main scanning direction on a deflective face of the deflecting element, and a third optical element for focusing the beam deflected by the deflecting element in a spot shape on a scanned surface. The third optical element has a spherical lens and a toric lens in order from the side of the deflecting element, surfaces of the spherical lens comprise a meniscus shape of positive refracting power with a concave surface faced toward the deflecting element, and the toric lens has two lens surfaces formed in aspherical shapes in a main scanning section and comprising a meniscus shape of positive refracting power with a convex surface faced toward the deflecting element in the vicinity of a center of scan.
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Fujibayashi Kazuo
Hoshi Koji
Ishibe Yoshihiro
Kato Manabu
Canon Kabushiki Kaisha
Le N.
Pham Hai C.
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