Mitsubishi Electric Corporation

Daisuke Ohama

Taku Matsuzawa

Akiko Fujiuchi

Toru Shiraki

Yuki Okuhigashi

Hideki Kunishio

Masahiko Takashina

Masaaki Okada

Masaki Wakisaka

Atsushi Ito

Shigeru Matsuo

Hajime Nakajima

Hiroyuki Kawano

Hiroyuki Asano

Akira Daijogo

Toru Aramaki

Akira Ota

Sadaaki Yoshioka

Masaru Imaizumi

Toshiaki Shoji

Seiichi Matsumura

Homare Takeda

Hiroaki Matsunaga

An image-reading apparatus includes a housing having a rectangular-shaped opening on a side of a reading target, a lens portion retained or housed within the housing, and a sensor element to receive light condensed by the lens portion, the light being from the reading target. Long sides of the opening include a first layer that is flat and is disposed on the side of the reading target and a second layer that is continuous with the first layer. The long sides of the opening of the housing of the image-reading apparatus has a flat surface on the side of the reading target and an interface between the first layer and the second layer that is curved.

Image reading device having a rectangular-shaped opening on a side of a reading target, wherein long sides of the rectangular shaped opening including a first layer, a second layer and an interface between the first layer and the second layer that has an arched shape warping from a center portion of the rectangular-shaped opening

An image reading device includes (i) light guides extending in a main scanning direction and configured to emit light from a light source toward a reading target moving relatively in a sub-scanning direction, the light from the light source being projected into end surfaces of the light guides in the main scanning direction, (ii) an optical filter arranged between the light source and the end surfaces of the light guides and configured to block or attenuate light having a specific wavelength from the light from the light source, (iii) a lens body to focus reflected light reflected by the reading target onto a light receiver to convert the reflected light into an electrical signal, and (iv) a lens holder. The lens holder includes a first positioner for positioning the light guides and a second positioner for positioning the optical filter.

Image reading device

A light guide includes an incident surface provided at an end portion of the light guide in the longitudinal direction and upon which light emitted by a light source incidents; an emission surface being flat-shaped, the emission surface emitting the light that enters the light guide through the incident surface to an illumination target; a reflective surface having a parabolic shape to generate collimated light directed toward the emission surface by reflecting light from a focal point of the parabolic shape or light from a predetermined area including the focal point, and a light scatterer having a predetermined scattering area to scatter light that entered the light guide through the incident surface and reflect light that entered the light guide through the incident surface in a direction of the reflective surface. The emission surface includes a first emission surface that has a predetermined length from an end portion of the light guide facing the light source along the longitudinal direction, the emission surface being set to an angle at which, among the light scattered by the light scatterer, the collimated light generated by the reflective surface is totally reflected.

Light guide and image scanning device

An image reading device includes light guides () that emit light to an object to be read, a lens body () that condenses reflected light, a light receiver () that receives the reflected light, a sensor board () on which is mounted the light receiver (), a lens holder (), and a housing () that houses or holds these components. The lens holder () includes a holder bottom (), light guide positioners () and lens body holders (). In the lens holder (), the lens body () is attached between the lens body holders (), the sensor board () is attached to the holder bottom () such that the light receiver () aligns with an optical axis of the lens body (), and the light guides () are attached to the light guide positioners (). A surface of each light guide positioner () that faces the corresponding light guide () to be attached has at least a portion having a same shape a s a shape of a surface of the light guide.

An image scanning device includes a linear light source to illuminate a linear illumination position of a scan target with light, a lens body, and a sensor. The linear light source includes a light guide, a scatterer, an emitter, a stepped portion, and a light-shielding member. The stepped portion is formed, from the end surface of the transparent body along the main scan direction, on a side of the light guide that is opposite to the illumination position side of the light guide. The light-shielding member covers a portion of the emitter of the light guide, the portion including the end surface of the transparent body, and extends beyond the stepped portion in the main scan direction and has an end portion that is located out of a scan range of the sensor in the main scan direction.

Image scanning device

An illumination device includes a light source and a rod-like light guide extending in a longitudinal direction for guiding incident light to an object to be illuminated. The light source is disposed at an end of the light guide extending in a longitudinal direction. The light guide includes an incident surface at the longitudinal end to receive light emitted from the light source, a flat emission surface to emit light incident on the light guide toward the object to be illuminated, a parabolic reflective surface to reflect, toward the emission surface, light from a focus of the paraboloid shape of the refractive surface or light passing through the focus from a predetermined area, and a light-scattering portion, having a predetermined area, to scatter light entering through the incident surface and reflect the light toward the reflective surface. The light-scattering portion is placed at the focus of the paraboloid shape or at a position where light reflected by the scattering area on the light-scattering portion passes through the focus.

Illumination device and image reading device

An objective of the present disclosure is to obtain a light guide and an image reading apparatus capable of efficiently irradiating an object to be irradiated (). The light guide and the image reading apparatus include a rod-shaped light guide main body () extending in the longitudinal direction, a first end face () that is an end face of the light guide main body () along the transverse direction, a light scattering pattern () that scatters light that enters from the first end face () and is guided inside the light guide main body (), and a light emission surface portion () formed on the light guide main body along a longitudinal direction, the light emission surface portion () being a surface from which the light scattered at the light scattering pattern () is emitted to outside the light guide main body () after being reflected on a wall surface of the light guide main body (). The light emission surface portion () includes a first light emission surface () that is disposed near the first end face () in the longitudinal direction and a second light emission surface () that is contiguous with the first light emission surface () in the longitudinal direction. A width of the first light emission surface () in the transverse direction is shorter than a width of the second light emission surface () in the transverse direction.

Light guide and image reading apparatus

An image reader configured to read an image of an object-to-be-read includes: a board, a line sensor assembly including a plurality of photosensitive elements formed on one surface of the board along a main scanning direction, a lens array assembly including a plurality of lenses arrayed along the main scanning direction, and configured to focus the reflected light onto the line sensor assembly, a light shield configured to support a portion of the lens array assembly at the line-sensor-assembly side or to be in contact with the portion of the lens array assembly at the line-sensor-assembly side, and to block light other than the light focused by the lens array assembly, and a transparent member made of transparent material, formed with a retainer space where the lens array assembly and the light shield are retained, and covering a portion of the lens array assembly at the object-to-be-read side and the light shield.

Image read-in device with fastener to fasten transparent member retaining lens array assembly and light shield to board

An image sensor including: light guides for irradiating light onto an irradiated object; a lens that focuses reflected light that was reflected by the irradiated object; a sensor that receives the reflected light that was focused by the lens; and a housing. The housing houses or holds the light guides, the lens, and the sensor, and is formed by integrating a housing metal portion and a housing resin portion.

Image sensor

A light source device includes: a light-emitting part; a light guide including in its center a columnar part whose central axis direction is a lengthwise direction, that guides light input into an end face from the light-emitting part, and outputs light from a side face of the columnar part; a light guide holder that covers an end of the light guide except for at least part of the end face; and a support part, including a through-hole that penetrates from one face to another face formed therein, that holds an end of the light guide holder on a side of a first opening on the one face of the through-hole so as to allow sliding in the lengthwise direction, and light is input into the light guide via a second opening on the other face of the through-hole.

Light-source device

A light source device includes: a rod-shaped light source or an array light source extending in a main scanning direction; a reflector that is placed opposite the rod-shaped light source or the array light source, extends in the main scanning direction, and reflects light output from a side face of the rod-shaped light source or the array light source; and a plurality of reflector supports that are arranged at an interval along the main scanning direction and support the reflector.

Light-source device and reflector-support structure

An illuminating apparatus includes a columnar light guide, a board having a light source fastened on one surface thereof, and a holder. The holder is formed with a through-hole into which an end of the light guide in the columnar center axis direction is fitted to hold the light guide, and a catch that catches and holds the board with the light source facing the end surface of the light guide in the columnar center axis direction in the through-hole.

Growing community of inventors

Chiyoda-ku, Japan

Daisuke Ohama