Sharp Kabushiki Kaisha Corporation

Hiroshi Yamamoto

Takaharu Motoyama

Atsuo Nakao

Hidenori Sato

Reishi Aoki

Atsushi Ueda

Yoshiyuki Nasuno

Kazuhito Nishimura

Takayuki Ohno

Kenji Wada

Yoshitaka Sugita

Hiroaki Goi

An optical scanning device includes a housing and an fθ lens accommodated in the housing. The housing has a bottom surface, and side walls erected from a bottom surface and surrounding the bottom surface along a perimeter thereof. One side wall of the side walls has, on an outer surface thereof, one or more positioners that position the optical scanning device relative to an image forming apparatus main body. The bottom surface has one or more first bottom surface ribs extending from the positioners toward the fθ lens in an oblique direction with respect to the side wall having the positioners in a plan view.

Optical scanning device and image forming apparatus including optical scanning device

An optical scanning apparatus includes a first polarizing member and a second polarizing member between a light source and a MEMS mirror that is a deflection mirror. The first polarizing member reflects a first polarization component included in a beam light emitted from the light source so as to squarely enter the MEMS mirror and passes a second polarization component having a phase difference of a half-wavelength with respect to the first polarization component. The second polarizing member is provided between the first polarizing member and the MEMS mirror to pass the first polarization component reflected by the first polarizing member therethrough twice before and after being reflected by the MEMS mirror to change the first polarization component into the second polarization component. A rotation axis of the MEMS mirror is parallel to an optical axis of the beam light immediately before being reflected by the first polarizing member.

Optical scanning apparatus and image forming apparatus

An optical scanning device comprises an optical box that houses an optical component(s). The optical box includes a box main body and a cover member. A first engaging portion is formed on a side wall of the box main body, and a second engaging portion that engages with the first engaging portion is formed on a first fitting wall portion of the cover member. The box main body is provided with a vertical wall that is erected inside the first engaging portion. Moreover, there is formed on the cover member with a first barrier wall that is protruded downward from a top wall so as to enter a space between the first engaging portion and the vertical wall.

Optical scanning device, housing cover, optical box and image forming apparatus

An optical scanning device according to the present invention has a 2-beam type first laser diode and a 1-beam type second laser diode. When resolution in a sub-scanning direction is 600 dpi, exposure processing is executed by a first laser beam and a second laser beam emitted from the first laser diode. And when the resolution in the sub-scanning direction is 1200 dpi, the exposure processing is executed by the first laser beam and a third laser beam emitted from the second laser diode.

Optical scanning device, image forming apparatus including optical scanning device, and optical scanning method

To provide an optical scanning device including a lower housing including an opened top part, an upper housing that covers the top part of the lower housing, a rotating polygon mirror that reflects a beam, an f&#x3b8; lens on which the beam reflected by the rotating polygon mirror is incident, and a reflection mirror that reflects the beam. The lower housing is provided with a bottom surface opening including an opened bottom surface between the rotating polygon mirror and the reflection mirror.

Optical scanning device including lower housing with bottom surface opening, and image forming apparatus

To provide an optical scanning device including a lower housing including an opened upper part, an upper housing that covers the upper part of the lower housing, and an f&#x3b8; lens on which a beam reflected by a rotating polygon mirror is incident. The lower housing includes a raised area being raised upward from a lower housing bottom surface. The f&#x3b8; lens is mounted to face a bottom side of the raised area.

Optical scanning device and image forming apparatus

An optical scanning device includes: a polygon mirror deflecting light beams; and a plurality of reflective mirrors reflecting the light beams so as to guide the light beams to respective photosensitive drums. A first f&#x3b8; lens is provided on an optical path of the light beam from the polygon mirror to a first reflective mirror. The optical path of the light beam reflected by a third reflective mirror crosses the optical path between the first reflective mirror and a second reflective mirror.

Light scanning device and image forming apparatus including the same

An optical scanning device provided with a casing, a plurality of light sources, a deflection scanning unit that deflects and scans light beams from the plurality of light sources onto a plurality of bodies to be scanned, and a plurality of optical units arranged between the deflection scanning unit and the bodies to be scanned, in which optical unit supporting members that support the optical units are provided, the optical unit supporting members support the plurality of optical units arranged at predetermined intervals, and a thermal expansion coefficient of the optical unit supporting members is lower than a thermal expansion coefficient of the casing.

Optical scanning device and image forming device provided with optical scanning device

A photoelectric conversion device comprising: a pin-type photoelectric conversion layer constituted of a p-type semiconductor layer, an i-type semiconductor layer and an n-type semiconductor layer, wherein the p-type semiconductor layer contains silicon atoms and nitrogen atoms, which is possible to improve photoelectric conversion efficiency.

Photoelectric conversion device and manufacturing method thereof

A thin-film solar cell comprises a set of a transparent conductive layer and a photoelectric conversion layer laminated in this order on a substrate, wherein the photoelectric conversion layer is made of a p-i-n junction, the i-layer is made of a crystalline layer and the transparent conductive layer is provided with a plurality of holes at its surface of the side of the photoelectric conversion layer, each of said holes having irregularities formed on its surface.

Growing community of inventors

Sakai, Japan

Hiroshi Yamamoto