Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Yohei Nokami

Takafumi Endo

Shigeru Toyota

Hideki Matsui

Takashi Iwakura

Hirokatsu Okegawa

Kimihiro Kaneko

Hideo Enomoto

Hirofumi Ryoki

An optical member includes a lens array including lens bodies, and transmissive members. The transmissive members are made of a material having a uniform refractive index, and are disposed at positions nearer an object-to-be-read than the corresponding lens bodies are disposed or at positions farther from the object-to-be-read than the corresponding lens bodies are disposed. The transmissive members have a columnar shape extending along the optical axes of the lens bodies, and allow light incident through one end faces to exit through the other end faces. At least either ones of the lens bodies or the transmissive members are arranged with distances therebetween larger than errors in the arrangement of the lens bodies and the transmissive members.

Optical member and image reading device

An image reading device having a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction; a first light source for applying light to an irradiated part in the hologram area; and a second light source separated from the first light source along the conveying direction and applying light to an irradiated part in the hologram area when the hologram area is conveyed by a prescribed distance. An irradiation angle at which the irradiated part is irradiated with the light of the first light source is made to be different from an irradiation angle at which the irradiated part is irradiated with the light of the second light source when the hologram part is conveyed by the prescribed distance. Lights reflected by the hologram area are respectively received to detect an electric signal of the hologram area of the irradiated member.

Image reading device

An image reading device includes: a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction; a first light source for applying light to an irradiated part in the hologram area; and a second light source separated from the first light source along the conveying direction and applying light to an irradiated part in the hologram area when the hologram area is conveyed by a prescribed distance. An irradiation angle at which the irradiated part is irradiated with the light of the first light source is made to be different from an irradiation angle at which the irradiated part is irradiated with the light of the second light source when the hologram part is conveyed by the prescribed distance. Lights reflected by the hologram area are respectively received to detect an electric signal of the hologram area of the irradiated member.

Image reading device which includes a light controlling unit

An RFID tag characterized in including: a dielectric substrate having a hole formed in one main surface thereof; a ground conductive pattern disposed on another main surface of this dielectric substrate; a conductive pattern disposed on the one main surface of the above-mentioned dielectric substrate in such a way as to be placed in an inner portion of the dielectric substrate at a predetermined distance from each of edges of the above-mentioned dielectric substrate, a slot being formed in this conductive pattern; and an IC chip electrically connected to the above-mentioned conductive pattern via this slot, and inserted into the above-mentioned hole of the above-mentioned dielectric substrate.

RFID tag

An image reading device having a compact plane-shaped illumination portion is provided, by which a portion of a target to be light-irradiated can be irradiated with light whose oblique angles are different from each other, and a transmission part of the target can be read. The image reading device includes a conveying means for conveying in a conveying direction a target to be light-irradiated including a transparent portion, a lens assembly, arranged on one side of the target, for focusing transmission light having passed through the transparent portion of the target, a sensor for receiving the transmission light focused by the lens assembly, a light source, positioned on the other side of the target, arranged in a main-scanning direction, and a light guide for guiding light from the light source in a sub-scanning direction, and the light guide having a reflective portion for reflecting the guided light and then irradiating a portion to be irradiated with the reflected light.

A compact image reading device is provided in which a plurality of illumination devices are not needed, and by which a hologram image can be accurately identified in a short period. The image reading device includes a first light source, arranged in a main-scanning direction on a face perpendicular to the conveying direction, for emitting light having a plurality of wavelengths, a second light source, arranged, in parallel to the first-light-source arrangement, on the same face on which the first light source is provided, or in the periphery thereof, for emitting light having a plurality of wavelengths, a light guide for guiding light from the first and second light sources in a sub-scanning direction, and the light guide, having total reflection faces whose illumination angles are different from each other, for irradiating a portion, of a hologram region, to be irradiated with light after totally reflected by the reflection faces, a lighting control means for controlling in a time division manner an exposure ratio between light quantities incident on the total reflection faces of the light guide, a lens assembly for focusing reflection light reflected by a reflective portion of a target positioned at the portion to be light-irradiated, and a sensor for receiving, for each divided time, light focused by the lens assembly, whereby the device is configured to enable detection of the hologram region in the target.

An image sensor includes: a light source that irradiates a light on an object; a lens body that converges a reflection of the light from the object; a plurality of IC chips that receive the reflection passed through the lens body; and a transparent member provided between the IC chips and the lens body. The transparent member includes a refractive index changing region provided at a portion opposite to a gap between adjacent IC chips. A refractive index in the refractive index changing region increases continuously or stepwise toward an inner portion of the transparent member from a surface of the transparent member on an IC chips side so that the refractive index changing region refracts a part of the reflection to be incident into the gap to the IC chips.

Image sensor and manufacturing method thereof

Image sensor with a transparent plate having refractive index changing regions

An image sensor includes: a sensor substrate on that a large number of semiconductor chips each of which has a plurality of image pickup elements, are linearly arranged to receive the reflected light converged by the lens; and a transparent plate that is interposed between the lens and the sensor substrate, and provides a light path region corresponding to the boundary region between adjacent semiconductor chips with a refractive function, so that the vertical light incident on the boundary region between semiconductor chipsis refracted and incident dividedly to the directions of respective image pickup elements.

Growing community of inventors

Tokyo, Japan

Yohei Nokami