Optical scanning device, image forming apparatus, and optical scanning method
AssigneeRicoh Company, Ltd.
InventorsSeizo Suzuki, Kenichi Takanashi
Life of this patent
Estimating the term…
Abstract
An optical scanning device condenses a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scans the surface to be scanned by the beam spot. At least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame, wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the end in the longitudinal direction of the holding frame is changed in light path in a sub-scan direction.
Claims17
An optical scanning device condensing a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the end in the longitudinal direction of the holding frame is changed in light path in a sub-scan direction.
An optical scanning device condensing a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the holding frame is turned outside of an effective writing range in a main scan direction.
An optical scanning device condensing a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is curved so that a ghost light generated as a result of the deflected beam being reflected by the holding frame forms a beam spot sufficiently spread on the surface to be scanned.
An image forming apparatus of performing optical scanning of a photosensitive surface of a photosensitive medium by an optical scanning device, forming a latent image, and visualizing the latent image,
- wherein the optical scanning device performing the optical scanning of the photosensitive surface of the photosensitive medium condenses the beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned as the photosensitive surface to form a beam spot thereon, and scans the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the end in the longitudinal direction of the holding frame is changed in light path in a sub-scan direction.
An image forming apparatus of performing optical scanning of a photosensitive surface of a photosensitive medium by an optical scanning device, forming a latent image, and visualizing the latent image,
- wherein the optical scanning device performing the optical scanning of the photosensitive surface of the photosensitive medium condenses the beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned as the photosensitive surface to form a beam spot thereon, and scans the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the holding frame is turned outside of an effective writing range in a main scan direction.
An image forming apparatus of performing optical scanning of a photosensitive surface of a photosensitive medium by an optical scanning device, forming a latent image, and visualizing the latent image,
- wherein the optical scanning device performing the optical scanning of the photosensitive surface of the photosensitive medium condenses the beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned as the photosensitive surface to form a beam spot thereon, and scans the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is curved so that a ghost light generated as a result of the deflected beam being reflected by the holding frame forms a beam spot sufficiently spread on the surface to be scanned.
An optical scanning method of condensing a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the end in the longitudinal direction of the holding frame is changed in light path in a sub-scan direction.
An optical scanning method of condensing a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the holding frame is turned outside of an effective writing range in a main scan direction.
An optical scanning method of condensing a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is curved so that a ghost light generated as a result of the deflected beam being reflected by the holding frame forms a beam spot sufficiently spread on the surface to be scanned.
An optical scanning device condensing a beam deflected by light deflecting means, by scanning and imaging means toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging means is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the end in the longitudinal direction of the holding frame is changed in light path in a sub-scan direction.
An optical scanning device condensing a beam deflected by light deflecting means, by scanning and imaging means toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging means is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the holding frame is turned outside of an effective writing range in a main scan direction.
An optical scanning device condensing a beam deflected by light deflecting means, by scanning and imaging means toward a surface to be scanned to form a beam spot thereon, and scanning the surface to be scanned by the beam spot,
- wherein at least one lens of the scanning and imaging means is configured so that a lens body thereof is held by a holding frame,
- wherein a rib surface at an end in a longitudinal direction of the holding frame is curved so that a ghost light generated as a result of the deflected beam being reflected by the holding frame forms a beam spot sufficiently spread on the surface to be scanned.
Dependencies are inferred from the claim text.