Light scanning unit
AssigneeSamsung Electronics Co., Ltd.
InventorJae-hwan Yoo
Life of this patent
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Abstract
A light scanning unit that corrects skew of a scanning line. The light scanning unit, which scans light on an exposed surface of a photosensitive medium, includes a light source to generate and illuminate at least one beam that corresponds to an image signal while being controlled on and off. A beam deflector deflects and scans a beam provided from the light source. A reflection mirror is obliquely arranged so that a scanning line directed to the exposed surface may be inclined with respect to a segment perpendicular to a transferring direction of the exposed surface to direct the scanning line to the exposed surface of the photosensitive medium by reflecting the scanning line provided from the beam deflector.
Claims14
A light scanning unit for scanning light on an exposed surface of a photosensitive medium, comprising:
- a light source to generate and illuminate at least one beam that corresponds to an image signal while being controlled on and off;
- a beam deflector to deflect and scan a beam provided from the light source;
- and
- a reflection mirror obliquely arranged so that a segment formed by a projection plane of the reflection mirror onto the exposed surface is maintained inclined with respect to a segment perpendicular to a transferring direction of the exposed surface to direct the scanning line to the exposed surface of the photosensitive medium by reflecting the scanning line provided from the beam deflector, the reflection mirror being arranged such that an optical path between the light source and a scan starting point on the reflection mirror is shorter than an optical path between the light source and a scan ending point on the reflection mirror.
A light scanning unit for scanning light onto an exposed surface of a photosensitive medium, comprising:
- a light source to generate and illuminate at least one beam that corresponds to an image signal while being controlled on and off;
- a collimating lens to condense a beam illuminated from the light source to change the beam into parallel or converging light beams;
- a beam deflector having a driving source and a polygonal mirror rotatable by the driving source to deflect and scan an incident beam;
- a cylindrical lens arranged between the collimating lens and the beam deflector to linearly focus a beam passing through the collimating lens onto the beam deflector;
- an f-θ lens to focus a beam onto a photosensitive medium by correcting the beam deflected from the beam deflector with different magnifications with respect to a primary and a secondary scanning directions;
- and
- a reflection mirror obliquely arranged so that a segment formed by a projection plane of the reflection mirror onto the exposed surface is maintained inclined with respect to a segment perpendicular to a transferring direction of the exposed surface to direct the scanning line to the exposed surface of the photosensitive medium by reflecting the scanning line provided from the beam deflector, the reflection mirror being arranged such that an optical path between the light source and a scan starting point on the reflection mirror is shorter than an optical path between the light source and a scan ending point on the reflection mirror.
Dependencies are inferred from the claim text.