Samsung Electronics Co., Ltd.

Hp Printing Korea Co., Ltd.

Hewlett-packard Development Company, L.P.

S-printing Solution Co., Ltd.

Jong-Wuk Ku

Heon-Hee Lim

Jae-hwan Yoo

Jin-kwon Chun

A plurality of light sources, an optical deflector including a rotational member configured to be rotational about an axis of rotation thereof, and a plurality of reflective members, are provided in a light scanning unit for an image forming apparatus. The optical deflector is arranged to deflect light incident obliquely from the plurality of light sources and the plurality of reflective members are arranged to reflect the light deflected by the optical deflector to a plurality of surfaces, which are to be scanned and correspond to the plurality of light sources, and arranged such that scan lines on opposite surfaces with respect to the axis of rotation of the optical deflector among the plurality of surfaces to be scanned are bent in the same direction.

Light scanning unit and image forming apparatus having the same

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 light scanning unit and an electrophotographic image forming apparatus using the same. The light scanning unit uses a reduced number of optical components by forming an optical unit disposed between a light source and an optical deflector by using only a single lens and ensures optical and mechanical properties by having an appropriate main/sub scanning magnification ratio.

Light scanning unit and electrophotographic image forming apparatus using the same

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

An optical scanning unit that includes a first optical device that forms collimated light from light radiated from a light source, a second optical device that focuses the collimated light onto a deflector, and an imaging optical device that focuses light deflected by the deflector onto an exposure object. The optical scanning unit further includes a refraction unit and a diffraction unit, and the power of the refraction unit is &#x3c6;r, the power of the diffraction unit is &#x3c6;d, and the ratio &#x3c6;r/&#x3c6;d is such that 0.5&#x3c;&#x3c6;r/&#x3c6;d&#x3c;1.3.

Growing community of inventors

Suwon-si, South Korea

Jong-Wuk Ku