Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Toru Shiraki

Daisuke Ohama

Daisuke Fukui

Eiji Niikura

Taku Matsuzawa

Mizuki Ogawa

Hideki Kunishio

Yuki Okuhigashi

Satoshi Yamanaka

Jun Someya

Yoshiaki Okuno

Hironobu Arimoto

Masaaki Okada

Masahiko Takashina

Homare Takeda

An image reading device includes a board including a plurality of imaging elements arranged along a scanning direction, and a housing including a plurality of optical components that are arranged along the scanning direction and a plurality of housing components that are arranged along the scanning direction. Each of the plurality of optical components focuses light reflected by a reading target onto a corresponding imaging element, and each of the plurality of housing components holds at least one optical component. The plurality of housing components are arranged to have a clearance therebetween and each of the plurality of housing components is fixed to the board at a position to transmit light through the optical components to focus onto the corresponding imaging element.

Image-reading device comprising a plurality of optical components arranged along the scanning direction board components arranged to have a second clearance therebetween and board components fixed to the housing

Image-reading device comprising a plurality of optical components arranged along the scanning direction and housing components arranged to have a first clearance therebetween, board components arranged to have a second clearance therebetween and the first clearance and the second clearance are arranged to be staggered in the scanning direction

An image reading device () includes a board () including a plurality of imaging elements () arranged along a scanning direction, and a housing () including (i) a plurality of optical components that are arranged along the scanning direction and (ii) a plurality of housing components () that are arranged along the scanning direction. Each of the plurality of optical components focuses light reflected by a reading target onto a corresponding imaging element (), and each of the plurality of housing components holds at least one optical component. The plurality of housing components () are arranged to have a clearance therebetween and each of the plurality of housing components () is fixed to the board () at a position to transmit light through the optical components to focus onto the corresponding imaging element ().

Image-reading device comprising a plurality of optical components arranged along the scanning direction and housing components arranged to have a first clearance therebetween

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

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 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

Interpolation data for a missing pixel are obtained () after a correction () for variations in the characteristics of the imaging devices ((),()). The correction for variations in characteristics includes, for example, a black level correction () and a sensitivity correction (). The interpolation includes, for example, interpolation calculations ((),()) such that a mean value of a plurality of pixels including the missing pixel and a mean value of a plurality of pixels not including the missing pixel become equal and an interpolation calculation (()) that takes the mean of the pixels to the right and left of the missing pixel, the calculation with the least error being selected (). Thus missing pixels in highly periodic images can be properly interpolated, and interpolation can be performed with high precision even when there are variations in the sensitivity characteristics of the individual imaging devices constituting the contact image sensor.

Image scanner and signal processing method

A signal-processing unit according to the present invention comprises: an input line provided with a plurality of analog input signal lines; a multiplexer circuit transmitting the plurality of analog signals from this input line to one signal line in the subsequent stage in a desired sequence; an analog-digital conversion circuit that converts an analog signal into a digital signal and outputs it; and a cross talk compensation circuit that with respect to each of signals having been sequentially outputted from the analog-digital conversion circuit, a coefficient of an effect level between this signal and the other plural signals interfering with each other is calculated, and data obtained by multiplying the signals by these coefficients are added up.

Growing community of inventors

Chiyoda-ku, Japan

Toru Shiraki