Samsung Electronics Co., Ltd.

Hewlett-packard Development Company, L.P.

S-printing Solution Co., Ltd.

Hp Printing Korea Co., Ltd.

Heon-Hee Lim

Jin-kwon Chun

Jae-hwan Yoo

Jong-Wuk Ku

Ho-hyun Hwang

Won-young Cho

Sung-dae Kim

Han-sung Lee

An optical scanning device includes an optical source portion to emit an optical beam; an optical deflector to deflect the optical beam in a main scanning direction; and an imaging lens to image the deflected optical beam onto a light-exposed object. A scanning line curvature caused by a refractive index deviation of the imaging lens is determined, and a curvature of the imaging lens in a sub-scanning direction is determined based on the determined scanning line curvature.

Compensation for scanning line curvature by using imaging lens

Provided are an light scanning device capable of adjusting the position of optics and an image forming apparatus including the light scanning device. The light scanning device includes first and second light sources configured to emit first and second light beams, respectively; optics including first and second lenses for transmitting the first and second light beams therethrough and a lens holder configured to support the second lens; and a housing configured to support the first and second light sources and the optics, wherein the first and second light sources and the first lens are supported to be fixed to the housing, and the second lens is supported to be able to move with respect to the first lens.

Light scanning device with lens holder and image forming apparatus

A light scanning unit includes a light source to emit a light beam; a polygonal mirror to deflect the light beam in a main scanning direction; and an imaging optical system to image the light beam onto a scanning surface. The polygonal mirror includes a plurality of reflection surfaces that are formed in an outer portion of the polygonal mirror and rotate around a rotational axis and an internal mirror surface that defines a hole. A ratio of an internal diameter d to an outer diameter D satisfies 0.1&#x2266;d/D&#x2266;0.3. The polygonal mirror is adhered to a motor unit that supports and rotates the polygonal mirror, using an adhesive. The internal mirror surface of the polygonal mirror defining the hole is point-bonded to the motor unit using the adhesive, and the point-bonding is conducted in a direction toward a corner of the reflection surfaces.

Weight-balanced polygonal mirror, light scanning unit using the polygonal mirror, and image forming apparatus

A polygon mirror assembly, a light scanning unit employing the polygon mirror assembly, and an image forming apparatus. The polygon mirror assembly includes a polygon mirror formed of a plastic material and having a plurality of reflection surfaces; and a motor unit to support and rotate the polygon mirror, where the polygon mirror is coupled to the motor unit by using an adhesive material.

Polygon mirror assembly, light scanning unit employing polygon mirror assembly, and image forming apparatus

A rotational polygon mirror includes a plurality of reflection surfaces that rotate with respect to a rotation axis, wherein each of the reflection surfaces has a convex shape and a cross-sectional profile perpendicular to the rotation axis having at least two inflection points.

Rotational polygon mirror having convex reflection surfaces and light scanning unit employing the same

A polygonal mirror, a light scanning unit using the polygonal mirror, and an image forming apparatus. The polygonal mirror is formed of a plastic and includes a plurality of reflection surfaces that are formed in an outer portion of the polygonal mirror and rotate around a rotational axis, and an internal mirror surface that defines a hole, wherein a ratio of an internal diameter d to an outer diameter D satisfies 0.1&#x2266;d/D&#x2266;0.3.

Disclosed is a light scanning unit that includes an imaging optical system disposed between a beam deflector and a surface to be scanned. The imaging optical system includes two adjacent imaging optical devices that are inclined with respect to the light path. The inclination directions of the two adjacent imaging optical devices may be determined according to the number of reflection units that are disposed on the light path between the two adjacent imaging optical devices. The disclosed light scanning unit of the above configuration may advantageously exhibit reduced ghost images, reduced bowing of the scan line, improved beam diameter uniformity, and/or improved color registration.

Light scanning unit

Disclosed is a light scanner with improved assembling datums of optical components. In the light scanner, an assembling datum with respect to a support body of an optical component is positioned between two ends of the optical component, for example, adjacent the central portion of the optical component. Accordingly, even when the lens is displaced, the change in an optical path may be reduced to mitigate the degradation in the image quality.

Growing community of inventors

Suwon-si, South Korea

Heon-Hee Lim