Samsung Electronics Co., Ltd.

S-printing Solution Co., Ltd.

Hewlett-packard Development Company, L.P.

Won-young Cho

Jae-hwan Yoo

Heon-Hee Lim

Ho-hyun Hwang

Jin-kwon Chun

There are provided a lens, a method of fabricating the lens, and a light scanning unit. The lens includes a lens portion having an effective optical surface, and a gate-side flange portion between the lens portion and a gate-side end of the lens. If the lens is disposed between two polarizers configured to polarize light linearly in perpendicular directions and is illuminated in an optical axis direction, interference fringes are generated on the lens, and peripheral interference fringes of the interference fringes extend continuously from the gate-side end and are longer than the gate-side flange portion.

Lens with low birefringence, method of fabricating the lens, and light scanning unit including the lens

A lens, a light scanning unit, and an electrophotography type image forming apparatus includes effective optical surfaces, wherein reference indicating portions to measure a decenter of the lens are arranged on the effective optical surfaces.

Lens, light scanning unit, and electrophotography type 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 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.

Provided are a light scanning unit and an electrophotographic image forming apparatus employing the same. A possible form deviation during fabrication of a cylindrical lens employed by the light scanning unit is reduced by intentionally giving a form deviation to the incident surface and the emission surface of the cylindrical lens in the main scanning direction.

Growing community of inventors

Suwon-si, South Korea

Won-young Cho