Konica Minolta, Inc.

Daisuke Kobayashi

Makoto Ooki

Takafumi Yuasa

Masahiko Takahashi

Takaki Uemura

Shohei Dokiya

Yoshihiro Inagaki

Naoki Tajima

Kazuki Ikeda

Takashi Kurosawa

Hideo Uemura

Mohdmakhtar Nurnabila

Nurnabila Mohdmakhtar

A sheet type discrimination device includes: a first light source unit that irradiates a sheet with light having a first wavelength and light having a second wavelength; a detection unit that detects light from the sheet and acquires a detection value based on the light; and a control unit that derives a determination result of a type of the sheet, wherein the first light source unit and the detection unit are located on a same side with respect to the sheet, the detection value includes: a first detection value; and a second detection value, and the control unit discriminates first-type recycled paper by first processing using the first detection value, and discriminates second-type recycled paper different from the first-type recycled paper by second processing using the second detection value.

Sheet type discrimination device, sheet type discrimination method, and sheet type discrimination program

A technology aimed at improvement of paper discriminating accuracy is provided. In an image forming apparatus, a control unit derives a discriminating result for types of paper. To be specific, the control unit derives the discriminating result for types of paper using a first detection value based on absorption by the paper of the light having the first wavelength and a second detection value based on absorption by the paper of the light having the second wavelength. The first wavelength ranges from 750 nm to 1100 nm. The second wavelength ranges from 400 nm to 500 nm.

Paper discriminating device, image forming apparatus, paper type discriminating method, and recording medium

A recording medium determination device includes a light emitter, a light detector, and a hardware processor. The light emitter emits inspection light to a recording medium. The light detector detects incident light including at least one of diffuse reflected light of the inspection light emitted to the recording medium and fluorescent light excited by the inspection light in the recording medium. The hardware processor makes a determination depending on a property of the recording medium based on a detection result of first incident light of the incident light in accordance with first inspection light of the inspection light and second incident light of the incident light in accordance with second inspection light of the inspection light obtained by the light detector. The second inspection light has an intensity whose peak wavelength is shorter than the peak wavelength of the first inspection light.

Recording medium determination device, image formation device, and recording medium determination method

A holder includes first and second attachments to be attached to an attachment target part of an image formation apparatus. The first attachment is located on a reflection light source side relative to a sensor in a direction of a line connecting the sensor and a reflection light source of the image formation apparatus The second attachment is located on an opposite side to the reflection light source relative to the sensor in the line direction. A holder includes first, second, and third attachments to be attached to an attachment target part of an image formation apparatus. The three attachments are elastically deformable portions. The first and second attachments are provided on one end side of the holder. The third attachment is provided on other end side of the holder. The three attachments are provided as to clamp the attachment target part by using resilience associated with elastic deformation.

Holder

An image forming apparatus includes a photoconductor, a light emitting substrate, and imaging optical systems, wherein an optical axis of the imaging optical systems are parallel, imaging magnifications of the imaging optical systems are substantially equal for the light emitting point groups, the imaging optical systems includes a first lens array, a second lens array, and apertures, central points of the light emitting point group exist in a first plane, central points of the imaging lenses exist in a second plane, central points of the apertures exist in a third plane, central points of the imaging lenses exist in a fourth plane, the first plane forms a non-zero predetermined angle with respect to a plane perpendicular to an optical axis direction, and the angle formed with respect to the plane perpendicular to the optical axis direction is greater in the order of the first, second, third, and the fourth plane.

Image forming apparatus

An image forming apparatus includes: a light-emitting element that includes light-emitting point groups; and an optical system that includes imaging systems focusing light from light-emitting points of the light-emitting point groups, wherein the light-emitting point groups and the imaging systems are combined into sets, the light-receiving surface has a cylindrical shape, each imaging system has a negative imaging magnification, light-emitting point groups are arranged at different positions, the imaging systems adjacent to each other have optical axes non-parallel to each other, each optical axis has an angle being not zero relative to the central normal, and a plane including the optical axis and the central normal is perpendicular to a rotational symmetry axis, and an angle between the optical axis and a line normal to the light-receiving surface is smaller than an angle between the central normal and a line normal to the light-receiving surface.

Provided is an image writing device including a deflector having deflective reflection surfaces for deflecting light flux emitted from a light source and a scanning imaging optical system that condenses the light flux as a light spot on a scanned surface of a latent image carrier, and performing optical scanning on the scanned surface at a constant speed, the image writing device further including: a surface detector that detects a deflective reflection surface that deflects the light flux; a storage that prestores a beam irradiation position in a sub scanning direction corresponding to each main image height on each of the deflective reflection surfaces; and a hardware processor that controls, on the basis of a beam irradiation position in the sub scanning direction corresponding to each main image height on the deflective reflection surface a light quantity of the light flux to be irradiated to the beam irradiation position.

Image writing device, image forming apparatus, and pitch unevenness suppressing method

A scanning optical apparatus includes a light source, a deflector and an imaging optical system. The deflector deflects a beam emitted from the light source to scan a scanning surface with the beam in a main scanning direction. The imaging optical system focuses the beam on the scanning surface. The imaging optical system includes a first lens having negative power in a sub scanning direction and a second lens having positive power in the sub scanning direction, in which the sub scanning direction is parallel to the scanning surface and perpendicular to the main scanning direction. The power &#x3c6;1 of the first lens, the power &#x3c6;2 of the second lens and a magnification &#x3b2; in the sub scanning direction of the imaging optical system satisfy the conditions &#x2212;1.2&#x2264;&#x3c6;1/&#x3c6;2&#x2264;&#x2212;0.9 and &#x2212;1.3&#x2264;&#x3b2;&#x2264;&#x2212;0.8.

Growing community of inventors

Hino, Japan

Daisuke Kobayashi